×
验证码:
换一张
忘记密码？
记住我
×
登录
中文版
|
English
中国科学院昆明植物研究所知识管理系统
Knowledge Management System of Kunming Institute of Botany,CAS
登录
注册
ALL
ORCID
题名
作者
学科领域
关键词
资助项目
文献类型
出处
收录类别
出版者
发表日期
存缴日期
学科门类
学习讨论厅
图片搜索
粘贴图片网址
首页
研究单元&专题
作者
文献类型
学科分类
知识图谱
新闻&公告
在结果中检索
研究单元&专题
昆明植物所硕博研... [603]
作者
彭德力 [2]
夏恩华 [2]
葛佳 [2]
刘杰 [1]
胡茜 [1]
庄会富 [1]
更多...
文献类型
学位论文 [603]
发表日期
2022 [18]
2021 [16]
2020 [82]
2019 [69]
2018 [54]
2017 [60]
更多...
语种
中文 [390]
英语 [15]
出处
资助项目
6 could use lots of photosynthates, but contributed little to the accumulation of biomass. 4. Photosynthetic rate of P. armeniacum decreased a little at the noon, and the highest photosynthetic rate was observed at 10:00h in the greenhouse. The variation of photosynthetic rate was in the same trend as stomatal conductance. Higher relative humidity seemed to be the key for higher photosynthetic rate in P. armeniacum. 5. The photosynthetic capacity of C. flavum was statistically larger than that of P. armeniacum. The lower leaf photosynthetic capacity of P. armeniacum was related to its lower leaf nitrogen concentration,leaf phosphorus concentration and enzyme activities. Meanwhile, the extremely lower stomatal conductance and internal mesophyll conductance might greatly limit the photosynthetic capacity of P. armeniacum. The lower stomatal conductance and photosynthetic rate of Paphiopedilum might partially caused by the lack of chloroplasts in the guard cell of Paphiopedilum. Compared with C. flavum, P. armeniacum was more fond of shade environment.6. The short longevity leaf of Cypripedium had bigger photosynthetic capacity and greater potential for fast growth. But the longer LL of Paphiopedilum enhanced nutrient conservation which could compensate its lower photosynthetic capacity. The short longevity leaf of Cypripedium usually had higher photosynthetic rate per unit leaf mass and dark respiration rate, and photosynthetic capacity decreased fast with leaf age. However, for Paphiopedilum, the situation was the opposite. 7. Compared with Cypripedium, Paphiopedilum had higher water use efficiency and lower photosynthetic nitrogen use efficiency. 8. The leaf of Paphiopedilum had higher leaf construction cost and longer repayment time than that of Cypripedium. The leaf structures and physiological functions of Paphiopedilum and Cypripedium reflected the adaptation to their habitats. The leaf morphological and physiological evolution of Paphiopedilum was related to water and resource-conserving traits in the karst habitat. The leaf traits of Cypripedium were the adaptation to the environment rich in water and nutrients but easy to change with seasons.Our results provided evidence of divergent evolution of congeneric orchids under natural selection.","jscount":"1","jsurl":"/simple-search?field1=all&rpp=10&accurate=false&advanced=false&fq=location.comm.id%3A1&sort_by=2&isNonaffiliated=false&search_type=-1&query1=Function&order=desc&&fq=dc.project.title_filter%3APaphiopedilum%5C+and%5C+Cypripedium%5C+are%5C+close%5C+relatives%5C+belonging%5C+to%5C+the%5C+subfamily%5C+Cypripedioideae.%5C+However%2C%5C+they%5C+undergo%5C+considerable%5C+divergence%5C+in%5C+the%5C+aspects%5C+of%5C+life%5C+forms%2C%5C+leaf%5C+traits%5C+and%5C+habitats.%5C+In%5C+present%5C+study%2C%5C+leaf%5C+morphologies%5C+and%5C+anatomical%5C+structures%2C%5C+leaf%5C+lifespans%2C%5C+leaf%5C+mass%5C+per%5C+area%2C%5C+photosynthetic%5C+capacities%2C%5C+nutrient%5C+use%5C+efficiencies%2C%5C+leaf%5C+construction%5C+costs%2C%5C+and%5C+maintenance%5C+costs%5C+were%5C+investigated%5C+to%5C+understand%5C+the%5C+relationship%5C+between%5C+leaf%5C+traits%5C+and%5C+ecophysiological%5C+adaptability%5C+of%5C+the%5C+two%5C+types%5C+of%5C+plants%5C+and%5C+explore%5C+the%5C+related%5C+ecological%5C+and%5C+evolutionary%5C+significances.%5C+The%5C+results%5C+suggest%5C+that%5C%3A1.%5C+Compared%5C+with%5C+Cypripedium%2C%5C+Paphiopedilum%5C+was%5C+characterized%5C+by%5C+drought%5C+tolerance%5C+from%5C+its%5C+leaf%5C+anatomical%5C+structure%5C+including%5C+fleshy%5C+leaf%2C%5C+thicker%5C+surface%5C+cuticle%2C%5C+huge%5C+abaxial%5C+epidermis%5C+cells%2C%5C+differentiation%5C+of%5C+palisade%5C+and%5C+spongy%5C+mesophyll%5C+layers%2C%5C+the%5C+prominent%5C+of%5C+mucilaginous%5C+substances%2C%5C+supportable%5C+leaf%5C+main%5C+vein%2C%5C+lower%5C+total%5C+stoma%5C+area%5C+%5C%28%25%5C%29%2C%5C+sunken%5C+stomata%5C+and%5C+special%5C+stoma%5C+structure.%5C+Leaf%5C+morphologies%5C+and%5C+structures%5C+of%5C+Cypripedium%5C+were%5C+to%5C+the%5C+contrary%5C+of%5C+Paphiopedilum.%5C+Leaf%5C+morphologies%5C+and%5C+structures%5C+embodied%5C+the%5C+adaptation%5C+to%5C+the%5C+environment%5C+in%5C+both%5C+Paphiopedilum%5C+and%5C+Cypripedium.%5C+Our%5C+results%5C+also%5C+confirmed%5C+the%5C+previous%5C+observation%5C+that%5C+Paphiopedilum%5C+was%5C+the%5C+only%5C+genus%5C+that%5C+did%5C+not%5C+possess%5C+guard%5C+cell%5C+chloroplasts.2.%5C+The%5C+photosynthetic%5C+capacities%5C+of%5C+P.%5C+armeniacum%5C+leaves%5C+were%5C+different%5C+with%5C+different%5C+leaf%5C+ages.%5C+The%5C+highest%5C+photosynthetic%5C+capacity%5C+occurred%5C+in%5C+leaf%5C+age%5C+1%5C-2%5C+years%2C%5C+followed%5C+by%5C+1%5C+year%5C+and%5C+2%5C-4%5C+years.%5C+The%5C+highest%5C+photosynthetic%5C+capacity%5C+of%5C+C.%5C+flavum%5C+occurred%5C+in%5C+leaf%5C+age%5C+60%5C+days%2C%5C+followed%5C+by%5C+30%5C+days%2C%5C+90%5C+days%5C+and%5C+120%5C+days.%5C+3.%5C+Photosynthetic%5C+capacities%5C+of%5C+different%5C+leaf%5C+positions%5C+were%5C+mainly%5C+affected%5C+by%5C+leaf%5C+ages%5C+in%5C+P.%5C+armeniacum.%5C+The%5C+four%5C+leaves%5C+lying%5C+on%5C+the%5C+top%5C+did%5C+the%5C+most%5C+accumulation%5C+of%5C+the%5C+assimilation%5C+products%5C+in%5C+the%5C+whole%5C+plant.%5C+The%5C+leaves%5C+of%5C+sequence%5C+number%5C+%3E%5C+6%5C+could%5C+use%5C+lots%5C+of%5C+photosynthates%2C%5C+but%5C+contributed%5C+little%5C+to%5C+the%5C+accumulation%5C+of%5C+biomass.%5C+4.%5C+Photosynthetic%5C+rate%5C+of%5C+P.%5C+armeniacum%5C+decreased%5C+a%5C+little%5C+at%5C+the%5C+noon%2C%5C+and%5C+the%5C+highest%5C+photosynthetic%5C+rate%5C+was%5C+observed%5C+at%5C+10%5C%3A00h%5C+in%5C+the%5C+greenhouse.%5C+The%5C+variation%5C+of%5C+photosynthetic%5C+rate%5C+was%5C+in%5C+the%5C+same%5C+trend%5C+as%5C+stomatal%5C+conductance.%5C+Higher%5C+relative%5C+humidity%5C+seemed%5C+to%5C+be%5C+the%5C+key%5C+for%5C+higher%5C+photosynthetic%5C+rate%5C+in%5C+P.%5C+armeniacum.%5C+5.%5C+The%5C+photosynthetic%5C+capacity%5C+of%5C+C.%5C+flavum%5C+was%5C+statistically%5C+larger%5C+than%5C+that%5C+of%5C+P.%5C+armeniacum.%5C+The%5C+lower%5C+leaf%5C+photosynthetic%5C+capacity%5C+of%5C+P.%5C+armeniacum%5C+was%5C+related%5C+to%5C+its%5C+lower%5C+leaf%5C+nitrogen%5C+concentration%2Cleaf%5C+phosphorus%5C+concentration%5C+and%5C+enzyme%5C+activities.%5C+Meanwhile%2C%5C+the%5C+extremely%5C+lower%5C+stomatal%5C+conductance%5C+and%5C+internal%5C+mesophyll%5C+conductance%5C+might%5C+greatly%5C+limit%5C+the%5C+photosynthetic%5C+capacity%5C+of%5C+P.%5C+armeniacum.%5C+The%5C+lower%5C+stomatal%5C+conductance%5C+and%5C+photosynthetic%5C+rate%5C+of%5C+Paphiopedilum%5C+might%5C+partially%5C+caused%5C+by%5C+the%5C+lack%5C+of%5C+chloroplasts%5C+in%5C+the%5C+guard%5C+cell%5C+of%5C+Paphiopedilum.%5C+Compared%5C+with%5C+C.%5C+flavum%2C%5C+P.%5C+armeniacum%5C+was%5C+more%5C+fond%5C+of%5C+shade%5C+environment.6.%5C+The%5C+short%5C+longevity%5C+leaf%5C+of%5C+Cypripedium%5C+had%5C+bigger%5C+photosynthetic%5C+capacity%5C+and%5C+greater%5C+potential%5C+for%5C+fast%5C+growth.%5C+But%5C+the%5C+longer%5C+LL%5C+of%5C+Paphiopedilum%5C+enhanced%5C+nutrient%5C+conservation%5C+which%5C+could%5C+compensate%5C+its%5C+lower%5C+photosynthetic%5C+capacity.%5C+The%5C+short%5C+longevity%5C+leaf%5C+of%5C+Cypripedium%5C+usually%5C+had%5C+higher%5C+photosynthetic%5C+rate%5C+per%5C+unit%5C+leaf%5C+mass%5C+and%5C+dark%5C+respiration%5C+rate%2C%5C+and%5C+photosynthetic%5C+capacity%5C+decreased%5C+fast%5C+with%5C+leaf%5C+age.%5C+However%2C%5C+for%5C+Paphiopedilum%2C%5C+the%5C+situation%5C+was%5C+the%5C+opposite.%5C+7.%5C+Compared%5C+with%5C+Cypripedium%2C%5C+Paphiopedilum%5C+had%5C+higher%5C+water%5C+use%5C+efficiency%5C+and%5C+lower%5C+photosynthetic%5C+nitrogen%5C+use%5C+efficiency.%5C+8.%5C+The%5C+leaf%5C+of%5C+Paphiopedilum%5C+had%5C+higher%5C+leaf%5C+construction%5C+cost%5C+and%5C+longer%5C+repayment%5C+time%5C+than%5C+that%5C+of%5C+Cypripedium.%5C+The%5C+leaf%5C+structures%5C+and%5C+physiological%5C+functions%5C+of%5C+Paphiopedilum%5C+and%5C+Cypripedium%5C+reflected%5C+the%5C+adaptation%5C+to%5C+their%5C+habitats.%5C+The%5C+leaf%5C+morphological%5C+and%5C+physiological%5C+evolution%5C+of%5C+Paphiopedilum%5C+was%5C+related%5C+to%5C+water%5C+and%5C+resource%5C-conserving%5C+traits%5C+in%5C+the%5C+karst%5C+habitat.%5C+The%5C+leaf%5C+traits%5C+of%5C+Cypripedium%5C+were%5C+the%5C+adaptation%5C+to%5C+the%5C+environment%5C+rich%5C+in%5C+water%5C+and%5C+nutrients%5C+but%5C+easy%5C+to%5C+change%5C+with%5C+seasons.Our%5C+results%5C+provided%5C+evidence%5C+of%5C+divergent%5C+evolution%5C+of%5C+congeneric%5C+orchids%5C+under%5C+natural%5C+selection."},{"jsname":"Paphiopedilum and Cypripedium，known as slipper orchids in horticulture, belong to the subfamily Cypripedioideae of the Orchidaceae. Although they are closely related phylogenetically, there are significant differences in leaf traits and geographical distributions between two genera. This dissertation includes the following sections: (1) the leaf functional traits were compared in six species of the two genera; (2) the physiological responses of P. armeniacum to different water regimes, light regimes and low temperature; (3) the leaf phenotypic plastics of C. flavum in response to the different light condition and the photosynthetic characteristics of three Cypripedium species during sexual reproduction. The aims are to understand the convergent and divergent evolution between the two genera in leaf traits and their adaptive significances, and the leaf plastic responses to different levels of resources. Such information could provide scientific basis for conservation and domestication of Paphiopedilum and Cypripedium. The results are given below:1. Compared with Paphiopedilum, Cypripedium showed significantly higher photosynthetic rate (Pmax), leaf nitrogen content (Na), photosynthetic nitrogen utilization (PNUE), the fractions of leaf nitrogen partitioning in carboxylation (PC) and bioenergetics (PB), specific leaf area (SLA), ratio of leaf chlorophyll a and b (Chla/b), but significantly lower leaf construction cost (CC) and the ratio of leaf carbon content to leaf nitrogen (C/N). These leaf traits of Cypripedium are considered as the adaptation to short growing period and rich soil nutrients in the alpine habitats. Conversely, the long life span, low Pmax and mesophyll conductance (gm) but high SLA, CC and C/N in Paphiopedilum indicated that the adaptation to low-light, limited-nutrient habitat in the limestone area. As a sympatric species of Paphiopedilum, C. lentiginosum not only kept phylogenetically leaf traits of Cypripedium, suchas stomatal conductance (gs), Pmax, PNUE and dormant in winter, but also possessed many leaf traits which is similar to that in Paphiopedilum, such as relative stomatal limitations (RSL), gm, the ratio of leaf chlorophyll a and b (Chl a/b), fraction of leaf nitrogen allocated to light-harvesting components (PL). These results indicated the convergent and divergent evolution of Paphiopedilum and Cypripedium in leaf traits.2. Paphiopedilum. armeniacum exhibited a high plasticity of leaf photosynthetic function in response to different light regimes, but the responses changes with the time. Due to grow under low light habitat, P. armeniacum grown under 50% shade (HL) had the significantly lowest Pmax than the plants grown under 75% shade (ML) and 95% shade (LL) after six months. However, after twelve months, the Pmax of the plants grown under HL increased significantly and then became the highest one among three levels of light. It is also found that leaf dry mass per unit area (LMA), leaf stomatal conductance (gS), internal mesophyll conductance (gm), the fraction of leaf nitrogen partitioning in photosynthetic carboxylation (PC), bioeneretics (PB) were greatly influenced by irradiance. The plants grown under HL increased gS, gm, PC, PB to increase Pmax. In addition, the plants grown under HL had the highest ratio of total chlorophyll content to total Carotenoid content (Car/Chl) while the plants grown under LL had the lowest ratio of leaf chlorophyll a and b (Chl a/b). As a result, plasticity of leaf photosynthetic physiology of P. armeniacum in response to different light regimes depended largely on leaf nitrogen partitioning and leaf structure. As for the numbers of flowering and fruiting, ML was the best light level.3. The responses of P. armeniacum to different water regimes were not significantly different. But the Pmax and the maximum photochemical efficiency of PSⅡ (Fv/Fm) decreased with the increased frequency of watering. The reasons were that the plants have high respiration rate (Rd) and make more use of light energy to oxidation cycle. The plants watered every eight days (MW) and every twenty days (LW) had higher Pmax than the plant watered every four days (HW) mainly because of the higher PC and PB. Besides, the leaves of P. armeniacum had excellent property for holding water also contributed to the high photosynthetic capacity.4. Paphiopedilum. armeniacum was very sensitive to the low temperature. The plants significantly decreased photosynthetic capacity after grown under 4℃ for three days and the photosynthetic machinery was destroyed after fifteen days. The photosynthetic capacity of P. armeniacum exhibited no change at 10℃ and 15℃.5. Cypripedium flavum of four habitats (DB, XRD, XZD and TSQ) with different light intensity exhibited different photosynthetic characteristics after transplanted to the same environment in Kunming. Among the habitats, the light intensity of DB was the highest while XRD was the lowest. The light intensity of XZD and TSQ were not significantly difference. Among all the plants in Kunming, the plants of DB had the significantly highest Pmax but the plants of XRD had the lowest Pmax. The light saturation point (LSP) and photosynthetic nitrogen use efficiency (PNUE) agreed well with the light intensity of four habitats and contributed to the high Pmax of DB. The LMA, Chl and leaf nitrogen content were not different among all the plants. C. flavum exhibited sensitively response to the change of light in leaf construction while kept the plasticity of leaf photosynthetic characteristics which developed from its own habitat.6. The photosynthetic capacity of C. tibeticum and C. flavum were significantly increased at the flowering stage. For these two species, the significantly increased Amax were closely related to the maximum carboxylation rate by ribulose-1, 5-bisphosphate carboxylase/oxygenase (Vcmax), photon saturated rate of electron transport (Jmax), the rate of triose phosphate utilization (TPU) and actual quantum efficiency of the photosystem II photochemistry (ΦPSII) respectively. However, flowering almost did not affect the photosynthetic capacity of C. guttatum. C. guttatum had the smallest plant size, the leaf area, the volume of labellum and the volume of fruit, but the biggest fruit volume per leaf area among three species. These results indicated that for C. flavum and C. tibeticum there were a physiological mechanism in photosynthesis to compensate the cost of flowering as well as increased resource acquisitions, which would be beneficial to the survival or future flowering of the plant. C. gutattum could keep a steady photosynthetic capacity during life history. This kind of pattern could decrease the effect of the reproductive costs as much as possible. In contrast to C. flavum and C. tibeticum, C. gutattum possessed a more economical and effective reproductive pattern which maybe related to its wider distribution.In conclusion, Paphiopedilum and Cypripedium have significantly different leaf traits which agree well with their habitats and there is a divergent and convergent evolution between the two genera. P. armeniacum is much tolerant and responsive to varying water and light availability but very sensitivity to the low temperature. Confronting the suddenly change of light environment, C. flavum can respond sensitively to the change of light in leaf construction but the plasticity of leaf photosynthetic characteristics which developed from its own habitat can hold for the next growing season. In contrast to C. flavum and C. tibeticum, C. gutattum possesses a more economical and effective reproductive pattern which maybe related to its wider distribution. The study of the relationship between the two genera, the response and tolerance to the environmental factors of the two genera are important for understanding the adaptation and evolution of the Cypripedioideae.","jscount":"1","jsurl":"/simple-search?field1=all&rpp=10&accurate=false&advanced=false&fq=location.comm.id%3A1&sort_by=2&isNonaffiliated=false&search_type=-1&query1=Function&order=desc&&fq=dc.project.title_filter%3APaphiopedilum%5C+and%5C+Cypripedium%EF%BC%8Cknown%5C+as%5C+slipper%5C+orchids%5C+in%5C+horticulture%2C%5C+belong%5C+to%5C+the%5C+subfamily%5C+Cypripedioideae%5C+of%5C+the%5C+Orchidaceae.%5C+Although%5C+they%5C+are%5C+closely%5C+related%5C+phylogenetically%2C%5C+there%5C+are%5C+significant%5C+differences%5C+in%5C+leaf%5C+traits%5C+and%5C+geographical%5C+distributions%5C+between%5C+two%5C+genera.%5C+This%5C+dissertation%5C+includes%5C+the%5C+following%5C+sections%5C%3A%5C+%5C%281%5C%29%5C+the%5C+leaf%5C+functional%5C+traits%5C+were%5C+compared%5C+in%5C+six%5C+species%5C+of%5C+the%5C+two%5C+genera%5C%3B%5C+%5C%282%5C%29%5C+the%5C+physiological%5C+responses%5C+of%5C+P.%5C+armeniacum%5C+to%5C+different%5C+water%5C+regimes%2C%5C+light%5C+regimes%5C+and%5C+low%5C+temperature%5C%3B%5C+%5C%283%5C%29%5C+the%5C+leaf%5C+phenotypic%5C+plastics%5C+of%5C+C.%5C+flavum%5C+in%5C+response%5C+to%5C+the%5C+different%5C+light%5C+condition%5C+and%5C+the%5C+photosynthetic%5C+characteristics%5C+of%5C+three%5C+Cypripedium%5C+species%5C+during%5C+sexual%5C+reproduction.%5C+The%5C+aims%5C+are%5C+to%5C+understand%5C+the%5C+convergent%5C+and%5C+divergent%5C+evolution%5C+between%5C+the%5C+two%5C+genera%5C+in%5C+leaf%5C+traits%5C+and%5C+their%5C+adaptive%5C+significances%2C%5C+and%5C+the%5C+leaf%5C+plastic%5C+responses%5C+to%5C+different%5C+levels%5C+of%5C+resources.%5C+Such%5C+information%5C+could%5C+provide%5C+scientific%5C+basis%5C+for%5C+conservation%5C+and%5C+domestication%5C+of%5C+Paphiopedilum%5C+and%5C+Cypripedium.%5C+The%5C+results%5C+are%5C+given%5C+below%5C%3A1.%5C+Compared%5C+with%5C+Paphiopedilum%2C%5C+Cypripedium%5C+showed%5C+significantly%5C+higher%5C+photosynthetic%5C+rate%5C+%5C%28Pmax%5C%29%2C%5C+leaf%5C+nitrogen%5C+content%5C+%5C%28Na%5C%29%2C%5C+photosynthetic%5C+nitrogen%5C+utilization%5C+%5C%28PNUE%5C%29%2C%5C+the%5C+fractions%5C+of%5C+leaf%5C+nitrogen%5C+partitioning%5C+in%5C+carboxylation%5C+%5C%28PC%5C%29%5C+and%5C+bioenergetics%5C+%5C%28PB%5C%29%2C%5C+specific%5C+leaf%5C+area%5C+%5C%28SLA%5C%29%2C%5C+ratio%5C+of%5C+leaf%5C+chlorophyll%5C+a%5C+and%5C+b%5C+%5C%28Chla%5C%2Fb%5C%29%2C%5C+but%5C+significantly%5C+lower%5C+leaf%5C+construction%5C+cost%5C+%5C%28CC%5C%29%5C+and%5C+the%5C+ratio%5C+of%5C+leaf%5C+carbon%5C+content%5C+to%5C+leaf%5C+nitrogen%5C+%5C%28C%5C%2FN%5C%29.%5C+These%5C+leaf%5C+traits%5C+of%5C+Cypripedium%5C+are%5C+considered%5C+as%5C+the%5C+adaptation%5C+to%5C+short%5C+growing%5C+period%5C+and%5C+rich%5C+soil%5C+nutrients%5C+in%5C+the%5C+alpine%5C+habitats.%5C+Conversely%2C%5C+the%5C+long%5C+life%5C+span%2C%5C+low%5C+Pmax%5C+and%5C+mesophyll%5C+conductance%5C+%5C%28gm%5C%29%5C+but%5C+high%5C+SLA%2C%5C+CC%5C+and%5C+C%5C%2FN%5C+in%5C+Paphiopedilum%5C+indicated%5C+that%5C+the%5C+adaptation%5C+to%5C+low%5C-light%2C%5C+limited%5C-nutrient%5C+habitat%5C+in%5C+the%5C+limestone%5C+area.%5C+As%5C+a%5C+sympatric%5C+species%5C+of%5C+Paphiopedilum%2C%5C+C.%5C+lentiginosum%5C+not%5C+only%5C+kept%5C+phylogenetically%5C+leaf%5C+traits%5C+of%5C+Cypripedium%2C%5C+suchas%5C+stomatal%5C+conductance%5C+%5C%28gs%5C%29%2C%5C+Pmax%2C%5C+PNUE%5C+and%5C+dormant%5C+in%5C+winter%2C%5C+but%5C+also%5C+possessed%5C+many%5C+leaf%5C+traits%5C+which%5C+is%5C+similar%5C+to%5C+that%5C+in%5C+Paphiopedilum%2C%5C+such%5C+as%5C+relative%5C+stomatal%5C+limitations%5C+%5C%28RSL%5C%29%2C%5C+gm%2C%5C+the%5C+ratio%5C+of%5C+leaf%5C+chlorophyll%5C+a%5C+and%5C+b%5C+%5C%28Chl%5C+a%5C%2Fb%5C%29%2C%5C+fraction%5C+of%5C+leaf%5C+nitrogen%5C+allocated%5C+to%5C+light%5C-harvesting%5C+components%5C+%5C%28PL%5C%29.%5C+These%5C+results%5C+indicated%5C+the%5C+convergent%5C+and%5C+divergent%5C+evolution%5C+of%5C+Paphiopedilum%5C+and%5C+Cypripedium%5C+in%5C+leaf%5C+traits.2.%5C+Paphiopedilum.%5C+armeniacum%5C+exhibited%5C+a%5C+high%5C+plasticity%5C+of%5C+leaf%5C+photosynthetic%5C+function%5C+in%5C+response%5C+to%5C+different%5C+light%5C+regimes%2C%5C+but%5C+the%5C+responses%5C+changes%5C+with%5C+the%5C+time.%5C+Due%5C+to%5C+grow%5C+under%5C+low%5C+light%5C+habitat%2C%5C+P.%5C+armeniacum%5C+grown%5C+under%5C+50%25%5C+shade%5C+%5C%28HL%5C%29%5C+had%5C+the%5C+significantly%5C+lowest%5C+Pmax%5C+than%5C+the%5C+plants%5C+grown%5C+under%5C+75%25%5C+shade%5C+%5C%28ML%5C%29%5C+and%5C+95%25%5C+shade%5C+%5C%28LL%5C%29%5C+after%5C+six%5C+months.%5C+However%2C%5C+after%5C+twelve%5C+months%2C%5C+the%5C+Pmax%5C+of%5C+the%5C+plants%5C+grown%5C+under%5C+HL%5C+increased%5C+significantly%5C+and%5C+then%5C+became%5C+the%5C+highest%5C+one%5C+among%5C+three%5C+levels%5C+of%5C+light.%5C+It%5C+is%5C+also%5C+found%5C+that%5C+leaf%5C+dry%5C+mass%5C+per%5C+unit%5C+area%5C+%5C%28LMA%5C%29%2C%5C+leaf%5C+stomatal%5C+conductance%5C+%5C%28gS%5C%29%2C%5C+internal%5C+mesophyll%5C+conductance%5C+%5C%28gm%5C%29%2C%5C+the%5C+fraction%5C+of%5C+leaf%5C+nitrogen%5C+partitioning%5C+in%5C+photosynthetic%5C+carboxylation%5C+%5C%28PC%5C%29%2C%5C+bioeneretics%5C+%5C%28PB%5C%29%5C+were%5C+greatly%5C+influenced%5C+by%5C+irradiance.%5C+The%5C+plants%5C+grown%5C+under%5C+HL%5C+increased%5C+gS%2C%5C+gm%2C%5C+PC%2C%5C+PB%5C+to%5C+increase%5C+Pmax.%5C+In%5C+addition%2C%5C+the%5C+plants%5C+grown%5C+under%5C+HL%5C+had%5C+the%5C+highest%5C+ratio%5C+of%5C+total%5C+chlorophyll%5C+content%5C+to%5C+total%5C+Carotenoid%5C+content%5C+%5C%28Car%5C%2FChl%5C%29%5C+while%5C+the%5C+plants%5C+grown%5C+under%5C+LL%5C+had%5C+the%5C+lowest%5C+ratio%5C+of%5C+leaf%5C+chlorophyll%5C+a%5C+and%5C+b%5C+%5C%28Chl%5C+a%5C%2Fb%5C%29.%5C+As%5C+a%5C+result%2C%5C+plasticity%5C+of%5C+leaf%5C+photosynthetic%5C+physiology%5C+of%5C+P.%5C+armeniacum%5C+in%5C+response%5C+to%5C+different%5C+light%5C+regimes%5C+depended%5C+largely%5C+on%5C+leaf%5C+nitrogen%5C+partitioning%5C+and%5C+leaf%5C+structure.%5C+As%5C+for%5C+the%5C+numbers%5C+of%5C+flowering%5C+and%5C+fruiting%2C%5C+ML%5C+was%5C+the%5C+best%5C+light%5C+level.3.%5C+The%5C+responses%5C+of%5C+P.%5C+armeniacum%5C+to%5C+different%5C+water%5C+regimes%5C+were%5C+not%5C+significantly%5C+different.%5C+But%5C+the%5C+Pmax%5C+and%5C+the%5C+maximum%5C+photochemical%5C+efficiency%5C+of%5C+PS%E2%85%A1%5C+%5C%28Fv%5C%2FFm%5C%29%5C+decreased%5C+with%5C+the%5C+increased%5C+frequency%5C+of%5C+watering.%5C+The%5C+reasons%5C+were%5C+that%5C+the%5C+plants%5C+have%5C+high%5C+respiration%5C+rate%5C+%5C%28Rd%5C%29%5C+and%5C+make%5C+more%5C+use%5C+of%5C+light%5C+energy%5C+to%5C+oxidation%5C+cycle.%5C+The%5C+plants%5C+watered%5C+every%5C+eight%5C+days%5C+%5C%28MW%5C%29%5C+and%5C+every%5C+twenty%5C+days%5C+%5C%28LW%5C%29%5C+had%5C+higher%5C+Pmax%5C+than%5C+the%5C+plant%5C+watered%5C+every%5C+four%5C+days%5C+%5C%28HW%5C%29%5C+mainly%5C+because%5C+of%5C+the%5C+higher%5C+PC%5C+and%5C+PB.%5C+Besides%2C%5C+the%5C+leaves%5C+of%5C+P.%5C+armeniacum%5C+had%5C+excellent%5C+property%5C+for%5C+holding%5C+water%5C+also%5C+contributed%5C+to%5C+the%5C+high%5C+photosynthetic%5C+capacity.4.%5C+Paphiopedilum.%5C+armeniacum%5C+was%5C+very%5C+sensitive%5C+to%5C+the%5C+low%5C+temperature.%5C+The%5C+plants%5C+significantly%5C+decreased%5C+photosynthetic%5C+capacity%5C+after%5C+grown%5C+under%5C+4%E2%84%83%5C+for%5C+three%5C+days%5C+and%5C+the%5C+photosynthetic%5C+machinery%5C+was%5C+destroyed%5C+after%5C+fifteen%5C+days.%5C+The%5C+photosynthetic%5C+capacity%5C+of%5C+P.%5C+armeniacum%5C+exhibited%5C+no%5C+change%5C+at%5C+10%E2%84%83%5C+and%5C+15%E2%84%83.5.%5C+Cypripedium%5C+flavum%5C+of%5C+four%5C+habitats%5C+%5C%28DB%2C%5C+XRD%2C%5C+XZD%5C+and%5C+TSQ%5C%29%5C+with%5C+different%5C+light%5C+intensity%5C+exhibited%5C+different%5C+photosynthetic%5C+characteristics%5C+after%5C+transplanted%5C+to%5C+the%5C+same%5C+environment%5C+in%5C+Kunming.%5C+Among%5C+the%5C+habitats%2C%5C+the%5C+light%5C+intensity%5C+of%5C+DB%5C+was%5C+the%5C+highest%5C+while%5C+XRD%5C+was%5C+the%5C+lowest.%5C+The%5C+light%5C+intensity%5C+of%5C+XZD%5C+and%5C+TSQ%5C+were%5C+not%5C+significantly%5C+difference.%5C+Among%5C+all%5C+the%5C+plants%5C+in%5C+Kunming%2C%5C+the%5C+plants%5C+of%5C+DB%5C+had%5C+the%5C+significantly%5C+highest%5C+Pmax%5C+but%5C+the%5C+plants%5C+of%5C+XRD%5C+had%5C+the%5C+lowest%5C+Pmax.%5C+The%5C+light%5C+saturation%5C+point%5C+%5C%28LSP%5C%29%5C+and%5C+photosynthetic%5C+nitrogen%5C+use%5C+efficiency%5C+%5C%28PNUE%5C%29%5C+agreed%5C+well%5C+with%5C+the%5C+light%5C+intensity%5C+of%5C+four%5C+habitats%5C+and%5C+contributed%5C+to%5C+the%5C+high%5C+Pmax%5C+of%5C+DB.%5C+The%5C+LMA%2C%5C+Chl%5C+and%5C+leaf%5C+nitrogen%5C+content%5C+were%5C+not%5C+different%5C+among%5C+all%5C+the%5C+plants.%5C+C.%5C+flavum%5C+exhibited%5C+sensitively%5C+response%5C+to%5C+the%5C+change%5C+of%5C+light%5C+in%5C+leaf%5C+construction%5C+while%5C+kept%5C+the%5C+plasticity%5C+of%5C+leaf%5C+photosynthetic%5C+characteristics%5C+which%5C+developed%5C+from%5C+its%5C+own%5C+habitat.6.%5C+The%5C+photosynthetic%5C+capacity%5C+of%5C+C.%5C+tibeticum%5C+and%5C+C.%5C+flavum%5C+were%5C+significantly%5C+increased%5C+at%5C+the%5C+flowering%5C+stage.%5C+For%5C+these%5C+two%5C+species%2C%5C+the%5C+significantly%5C+increased%5C+Amax%5C+were%5C+closely%5C+related%5C+to%5C+the%5C+maximum%5C+carboxylation%5C+rate%5C+by%5C+ribulose%5C-1%2C%5C+5%5C-bisphosphate%5C+carboxylase%5C%2Foxygenase%5C+%5C%28Vcmax%5C%29%2C%5C+photon%5C+saturated%5C+rate%5C+of%5C+electron%5C+transport%5C+%5C%28Jmax%5C%29%2C%5C+the%5C+rate%5C+of%5C+triose%5C+phosphate%5C+utilization%5C+%5C%28TPU%5C%29%5C+and%5C+actual%5C+quantum%5C+efficiency%5C+of%5C+the%5C+photosystem%5C+II%5C+photochemistry%5C+%5C%28%CE%A6PSII%5C%29%5C+respectively.%5C+However%2C%5C+flowering%5C+almost%5C+did%5C+not%5C+affect%5C+the%5C+photosynthetic%5C+capacity%5C+of%5C+C.%5C+guttatum.%5C+C.%5C+guttatum%5C+had%5C+the%5C+smallest%5C+plant%5C+size%2C%5C+the%5C+leaf%5C+area%2C%5C+the%5C+volume%5C+of%5C+labellum%5C+and%5C+the%5C+volume%5C+of%5C+fruit%2C%5C+but%5C+the%5C+biggest%5C+fruit%5C+volume%5C+per%5C+leaf%5C+area%5C+among%5C+three%5C+species.%5C+These%5C+results%5C+indicated%5C+that%5C+for%5C+C.%5C+flavum%5C+and%5C+C.%5C+tibeticum%5C+there%5C+were%5C+a%5C+physiological%5C+mechanism%5C+in%5C+photosynthesis%5C+to%5C+compensate%5C+the%5C+cost%5C+of%5C+flowering%5C+as%5C+well%5C+as%5C+increased%5C+resource%5C+acquisitions%2C%5C+which%5C+would%5C+be%5C+beneficial%5C+to%5C+the%5C+survival%5C+or%5C+future%5C+flowering%5C+of%5C+the%5C+plant.%5C+C.%5C+gutattum%5C+could%5C+keep%5C+a%5C+steady%5C+photosynthetic%5C+capacity%5C+during%5C+life%5C+history.%5C+This%5C+kind%5C+of%5C+pattern%5C+could%5C+decrease%5C+the%5C+effect%5C+of%5C+the%5C+reproductive%5C+costs%5C+as%5C+much%5C+as%5C+possible.%5C+In%5C+contrast%5C+to%5C+C.%5C+flavum%5C+and%5C+C.%5C+tibeticum%2C%5C+C.%5C+gutattum%5C+possessed%5C+a%5C+more%5C+economical%5C+and%5C+effective%5C+reproductive%5C+pattern%5C+which%5C+maybe%5C+related%5C+to%5C+its%5C+wider%5C+distribution.In%5C+conclusion%2C%5C+Paphiopedilum%5C+and%5C+Cypripedium%5C+have%5C+significantly%5C+different%5C+leaf%5C+traits%5C+which%5C+agree%5C+well%5C+with%5C+their%5C+habitats%5C+and%5C+there%5C+is%5C+a%5C+divergent%5C+and%5C+convergent%5C+evolution%5C+between%5C+the%5C+two%5C+genera.%5C+P.%5C+armeniacum%5C+is%5C+much%5C+tolerant%5C+and%5C+responsive%5C+to%5C+varying%5C+water%5C+and%5C+light%5C+availability%5C+but%5C+very%5C+sensitivity%5C+to%5C+the%5C+low%5C+temperature.%5C+Confronting%5C+the%5C+suddenly%5C+change%5C+of%5C+light%5C+environment%2C%5C+C.%5C+flavum%5C+can%5C+respond%5C+sensitively%5C+to%5C+the%5C+change%5C+of%5C+light%5C+in%5C+leaf%5C+construction%5C+but%5C+the%5C+plasticity%5C+of%5C+leaf%5C+photosynthetic%5C+characteristics%5C+which%5C+developed%5C+from%5C+its%5C+own%5C+habitat%5C+can%5C+hold%5C+for%5C+the%5C+next%5C+growing%5C+season.%5C+In%5C+contrast%5C+to%5C+C.%5C+flavum%5C+and%5C+C.%5C+tibeticum%2C%5C+C.%5C+gutattum%5C+possesses%5C+a%5C+more%5C+economical%5C+and%5C+effective%5C+reproductive%5C+pattern%5C+which%5C+maybe%5C+related%5C+to%5C+its%5C+wider%5C+distribution.%5C+The%5C+study%5C+of%5C+the%5C+relationship%5C+between%5C+the%5C+two%5C+genera%2C%5C+the%5C+response%5C+and%5C+tolerance%5C+to%5C+the%5C+environmental%5C+factors%5C+of%5C+the%5C+two%5C+genera%5C+are%5C+important%5C+for%5C+understanding%5C+the%5C+adaptation%5C+and%5C+evolution%5C+of%5C+the%5C+Cypripedioideae."},{"jsname":"Pinus yunnanensis is one of the main timber species in Yunnan province, and widely distributed in southwest of China. Forest stand growth models are built for predicting stand growth, which could provide useful quantitative information for forest management. Understanding stand growth is also important for estimating forest carbon stock and carbon sequestration. Several studies of growth model for Pinus yunnanensis have been reported, however, most of which focus on a specific part of growth model. Therefore, it is necessary and meaningful to further the study of growth model for important stand factors. As a scaling-up tool for the observational data, remote sensing technique makes scaling biomass estimation from ground plot to a large scale more feasible and effective. Stand growth model was studied based on 91 sample plots data collected in the Yangliu Township, Longyang District, Baoshan Prefecture. Nonlinear fitting was used in fitting and selecting alternative growth functions, models of site index, density and stand age, average DBH, average tree height and stock volume were built in this study. Stock volume calculated from plot data was converted to aboveground biomass, belowground biomass and carbon stock according to selected equations and parameters. A total of 18 remote sensing variables were derived from SPOT 4 imagery, including reflectance of each band, normalized difference vegetation index, ration vegetation index, etc. The correlationship between aboveground biomass and remote sensing variables was analyzed, based on their significance of correlation, multiple regression, stepwise regression, nonlinear fitting were used to establish the aboveground biomass model. The effect of image processing levels on biomass estimation was compared, 3 types of images were analyzed including fusioned image without radiometric correction, radiometrically corrected to top of atmosphere (TOA) reflectance, and atmospherically corrected to surface reflectance. The main conclusions of this study are as follow: (1) Schumacher function fitted the stand growth better in site index, single variable average DBH, average tree height and stock volume growth model. Models fitted from Schumacher were more stable as the coefficient of variation was much lower than other alternative functions. S function was the best model in the fitting between stand density and age. (2) Comparing with the single variable average DBH growth model, fitting was improved a little after reparameterizing the model by introducing site index and stand density index variables. Stepwise regression improved the fitting significantly, the model with average tree height, density and age variables had best fitting without colinearity between variables. Repameterizing the average tree height growth model improved the fitting results a lot by introducing site index and density index variables. (3) Single age variable stock volume growth model had low coefficient of determination, but it was improved a lot by introducing site index and stand density index in reparameterization. Stand age was excluded in the stepwise regression modles, if raplace average tree height with stand age, the stepwise regression model that included age variable had higher coefficient of dertmination, but might have collinearity between variables when using a higher colinearity caritia. (4) Image analysis indicated that middle infrared was an important band for biomass estimation, and atmpspheric correction could improve fitting results of aboveground bimass model. Modified ratio vegetation index calculated from middle infrared and red band had highest correlation coefficient with aboveground biomass in pansharpened image, while modified NDVI derived from middle infrared and red band had highest coefficient in both radometrically corrected image. Comparing the fitting results of multiregression, stepwise regression and single variable nonlinear fitting, S biomass model was the most suitable model in all images. The final aboveground biomass S model was built from the atmospherically corrected image with modified NDVI as variable. Biomass estimation error of S model with surface reflectance image was evaluated, results shown estimation had high root of mean square error (RMSE), and quite small relative bias, which indicating that this method was suitable for mapping biomass spatial distribution on large scale. Finally, above ground biomass and carbon stock of Pinus yunnanensis were estimated with S model and surface reflectance image.","jscount":"1","jsurl":"/simple-search?field1=all&rpp=10&accurate=false&advanced=false&fq=location.comm.id%3A1&sort_by=2&isNonaffiliated=false&search_type=-1&query1=Function&order=desc&&fq=dc.project.title_filter%3APinus%5C+yunnanensis%5C+is%5C+one%5C+of%5C+the%5C+main%5C+timber%5C+species%5C+in%5C+Yunnan%5C+province%2C%5C+and%5C+widely%5C+distributed%5C+in%5C+southwest%5C+of%5C+China.%5C+Forest%5C+stand%5C+growth%5C+models%5C+are%5C+built%5C+for%5C+predicting%5C+stand%5C+growth%2C%5C+which%5C+could%5C+provide%5C+useful%5C+quantitative%5C+information%5C+for%5C+forest%5C+management.%5C+Understanding%5C+stand%5C+growth%5C+is%5C+also%5C+important%5C+for%5C+estimating%5C+forest%5C+carbon%5C+stock%5C+and%5C+carbon%5C+sequestration.%5C+Several%5C+studies%5C+of%5C+growth%5C+model%5C+for%5C+Pinus%5C+yunnanensis%5C+have%5C+been%5C+reported%2C%5C+however%2C%5C+most%5C+of%5C+which%5C+focus%5C+on%5C+a%5C+specific%5C+part%5C+of%5C+growth%5C+model.%5C+Therefore%2C%5C+it%5C+is%5C+necessary%5C+and%5C+meaningful%5C+to%5C+further%5C+the%5C+study%5C+of%5C+growth%5C+model%5C+for%5C+important%5C+stand%5C+factors.%5C+As%5C+a%5C+scaling%5C-up%5C+tool%5C+for%5C+the%5C+observational%5C+data%2C%5C+remote%5C+sensing%5C+technique%5C+makes%5C+scaling%5C+biomass%5C+estimation%5C+from%5C+ground%5C+plot%5C+to%5C+a%5C+large%5C+scale%5C+more%5C+feasible%5C+and%5C+effective.%5C+%5C+Stand%5C+growth%5C+model%5C+was%5C+studied%5C+based%5C+on%5C+91%5C+sample%5C+plots%5C+data%5C+collected%5C+in%5C+the%5C+Yangliu%5C+Township%2C%5C+Longyang%5C+District%2C%5C+Baoshan%5C+Prefecture.%5C+Nonlinear%5C+fitting%5C+was%5C+used%5C+in%5C+fitting%5C+and%5C+selecting%5C+alternative%5C+growth%5C+functions%2C%5C+models%5C+of%5C+site%5C+index%2C%5C+density%5C+and%5C+stand%5C+age%2C%5C+average%5C+DBH%2C%5C+average%5C+tree%5C+height%5C+and%5C+stock%5C+volume%5C+were%5C+built%5C+in%5C+this%5C+study.%5C+Stock%5C+volume%5C+calculated%5C+from%5C+plot%5C+data%5C+was%5C+converted%5C+to%5C+aboveground%5C+biomass%2C%5C+belowground%5C+biomass%5C+and%5C+carbon%5C+stock%5C+according%5C+to%5C+selected%5C+equations%5C+and%5C+parameters.%5C+A%5C+total%5C+of%5C+18%5C+remote%5C+sensing%5C+variables%5C+were%5C+derived%5C+from%5C+SPOT%5C+4%5C+imagery%2C%5C+including%5C+reflectance%5C+of%5C+each%5C+band%2C%5C+normalized%5C+difference%5C+vegetation%5C+index%2C%5C+ration%5C+vegetation%5C+index%2C%5C+etc.%5C+The%5C+correlationship%5C+between%5C+aboveground%5C+biomass%5C+and%5C+remote%5C+sensing%5C+variables%5C+was%5C+analyzed%2C%5C+based%5C+on%5C+their%5C+significance%5C+of%5C+correlation%2C%5C+multiple%5C+regression%2C%5C+stepwise%5C+regression%2C%5C+nonlinear%5C+fitting%5C+were%5C+used%5C+to%5C+establish%5C+the%5C+aboveground%5C+biomass%5C+model.%5C+The%5C+effect%5C+of%5C+image%5C+processing%5C+levels%5C+on%5C+biomass%5C+estimation%5C+was%5C+compared%2C%5C+3%5C+types%5C+of%5C+images%5C+were%5C+analyzed%5C+including%5C+fusioned%5C+image%5C+without%5C+radiometric%5C+correction%2C%5C+radiometrically%5C+corrected%5C+to%5C+top%5C+of%5C+atmosphere%5C+%5C%28TOA%5C%29%5C+reflectance%2C%5C+and%5C+atmospherically%5C+corrected%5C+to%5C+surface%5C+reflectance.%5C+The%5C+main%5C+conclusions%5C+of%5C+this%5C+study%5C+are%5C+as%5C+follow%5C%3A%5C+%5C%281%5C%29%5C+Schumacher%5C+function%5C+fitted%5C+the%5C+stand%5C+growth%5C+better%5C+in%5C+site%5C+index%2C%5C+single%5C+variable%5C+average%5C+DBH%2C%5C+average%5C+tree%5C+height%5C+and%5C+stock%5C+volume%5C+growth%5C+model.%5C+Models%5C+fitted%5C+from%5C+Schumacher%5C+were%5C+more%5C+stable%5C+as%5C+the%5C+coefficient%5C+of%5C+variation%5C+was%5C+much%5C+lower%5C+than%5C+other%5C+alternative%5C+functions.%5C+S%5C+function%5C+was%5C+the%5C+best%5C+model%5C+in%5C+the%5C+fitting%5C+between%5C+stand%5C+density%5C+and%5C+age.%5C+%5C%282%5C%29%5C+Comparing%5C+with%5C+the%5C+single%5C+variable%5C+average%5C+DBH%5C+growth%5C+model%2C%5C+fitting%5C+was%5C+improved%5C+a%5C+little%5C+after%5C+reparameterizing%5C+the%5C+model%5C+by%5C+introducing%5C+site%5C+index%5C+and%5C+stand%5C+density%5C+index%5C+variables.%5C+Stepwise%5C+regression%5C+improved%5C+the%5C+fitting%5C+significantly%2C%5C+the%5C+model%5C+with%5C+average%5C+tree%5C+height%2C%5C+density%5C+and%5C+age%5C+variables%5C+had%5C+best%5C+fitting%5C+without%5C+colinearity%5C+between%5C+variables.%5C+Repameterizing%5C+the%5C+average%5C+tree%5C+height%5C+growth%5C+model%5C+improved%5C+the%5C+fitting%5C+results%5C+a%5C+lot%5C+by%5C+introducing%5C+site%5C+index%5C+and%5C+density%5C+index%5C+variables.%5C+%5C%283%5C%29%5C+Single%5C+age%5C+variable%5C+stock%5C+volume%5C+growth%5C+model%5C+had%5C+low%5C+coefficient%5C+of%5C+determination%2C%5C+but%5C+it%5C+was%5C+improved%5C+a%5C+lot%5C+by%5C+introducing%5C+site%5C+index%5C+and%5C+stand%5C+density%5C+index%5C+in%5C+reparameterization.%5C+Stand%5C+age%5C+was%5C+excluded%5C+in%5C+the%5C+stepwise%5C+regression%5C+modles%2C%5C+if%5C+raplace%5C+average%5C+tree%5C+height%5C+with%5C+stand%5C+age%2C%5C+the%5C+stepwise%5C+regression%5C+model%5C+that%5C+included%5C+age%5C+variable%5C+had%5C+higher%5C+coefficient%5C+of%5C+dertmination%2C%5C+but%5C+might%5C+have%5C+collinearity%5C+between%5C+variables%5C+when%5C+using%5C+a%5C+higher%5C+colinearity%5C+caritia.%5C+%5C%284%5C%29%5C+Image%5C+analysis%5C+indicated%5C+that%5C+middle%5C+infrared%5C+was%5C+an%5C+important%5C+band%5C+for%5C+biomass%5C+estimation%2C%5C+and%5C+atmpspheric%5C+correction%5C+could%5C+improve%5C+fitting%5C+results%5C+of%5C+aboveground%5C+bimass%5C+model.%5C+Modified%5C+ratio%5C+vegetation%5C+index%5C+calculated%5C+from%5C+middle%5C+infrared%5C+and%5C+red%5C+band%5C+had%5C+highest%5C+correlation%5C+coefficient%5C+with%5C+aboveground%5C+biomass%5C+in%5C+pansharpened%5C+image%2C%5C+while%5C+modified%5C+NDVI%5C+derived%5C+from%5C+middle%5C+infrared%5C+and%5C+red%5C+band%5C+had%5C+highest%5C+coefficient%5C+in%5C+both%5C+radometrically%5C+corrected%5C+image.%5C+Comparing%5C+the%5C+fitting%5C+results%5C+of%5C+multiregression%2C%5C+stepwise%5C+regression%5C+and%5C+single%5C+variable%5C+nonlinear%5C+fitting%2C%5C+S%5C+biomass%5C+model%5C+was%5C+the%5C+most%5C+suitable%5C+model%5C+in%5C+all%5C+images.%5C+The%5C+final%5C+aboveground%5C+biomass%5C+S%5C+model%5C+was%5C+built%5C+from%5C+the%5C+atmospherically%5C+corrected%5C+image%5C+with%5C+modified%5C+NDVI%5C+as%5C+variable.%5C+Biomass%5C+estimation%5C+error%5C+of%5C+S%5C+model%5C+with%5C+surface%5C+reflectance%5C+image%5C+was%5C+evaluated%2C%5C+results%5C+shown%5C+estimation%5C+had%5C+high%5C+root%5C+of%5C+mean%5C+square%5C+error%5C+%5C%28RMSE%5C%29%2C%5C+and%5C+quite%5C+small%5C+relative%5C+bias%2C%5C+which%5C+indicating%5C+that%5C+this%5C+method%5C+was%5C+suitable%5C+for%5C+mapping%5C+biomass%5C+spatial%5C+distribution%5C+on%5C+large%5C+scale.%5C+Finally%2C%5C+above%5C+ground%5C+biomass%5C+and%5C+carbon%5C+stock%5C+of%5C+Pinus%5C+yunnanensis%5C+were%5C+estimated%5C+with%5C+S%5C+model%5C+and%5C+surface%5C+reflectance%5C+image."},{"jsname":"Plant secondary metabolites are a class of small molecular compounds which are not necessary for plant growth and development in nature. They have many types and different functions. The current studies about these compounds were often focused on the chemistry, pharmacology and drug development. Research about their biological effects is few. Exploration the biological effects of plant secondary metabolites is important to study their biological function and application. Scutellarin is an active pharmaceutical ingredient extracted from Erigeron breviscapus(vant) Hand Mass. It is an important plant secondary metabolite, belonging to flavonoid. Previous studies found that some flavonoids such as quercetin, naringenin were auxin transport inhibitors in plants and they were related to plant growth and development closely. As an important flavonoid, scutellarin also plays an important role in plant growth and development is unknown. In this paper, scutellarin was selected as research object. Through a series of plant physiological, biochemical and molecular techniques to explore the biological effects of scutellarin on Arabidopsis thaliana, we get the results as follows: Scutellarin had a hormone-like effect on Arabidopsis thaliana. It promoted root elongation at low concentration obviously; however the effect disappeared at high concentration. We made a further study about it and found that scutellarin had antagonism with methyl jasmonate and 2,4-dichlorophenoxy acetic acid (2,4-D) in root elongation. It also had an influence on nitrogen metabolism. Microarray results showed that the biological effects of scutellarin had a complex relationship with plant hormone and nitrogen metabolism. These were consistent with our experimental phenomenas. All these manifested that scutellarin played an important role in plant growth and development as a similar plant hormone. We tried the experiment using some other flavonoids. It was found that not all the flavonoids had the same obvious effects on root elongation like scutellarin; the biological effects of them were closely related to their chemical structures. In addition, the other two aspects of research were also carried out in the paper. One was exploring the role of phospholipase Dδ (PLDδ) under ultraviolet radiation in Arabidopsis. Our evidences suggested knockout PLDδ intensified membrane damage induced by UV radiation. The other one was lipid data collection and calculation of acyl chain lengths of lipid molecules in Arabidopsis under senescence induced by various stresses. We showed that the acyl chains of phosphoserine (PS, a head-group class of membrane glycerolipids with very long chains of fatty acids.) lengthened with the development and senescence in Arabidopsis. In contrast, the acyl chain lengths of other major head-group classes of membrane glycerolipids subtly fluctuated.","jscount":"1","jsurl":"/simple-search?field1=all&rpp=10&accurate=false&advanced=false&fq=location.comm.id%3A1&sort_by=2&isNonaffiliated=false&search_type=-1&query1=Function&order=desc&&fq=dc.project.title_filter%3APlant%5C+secondary%5C+metabolites%5C+are%5C+a%5C+class%5C+of%5C+small%5C+molecular%5C+compounds%5C+which%5C+are%5C+not%5C+necessary%5C+for%5C+plant%5C+growth%5C+and%5C+development%5C+in%5C+nature.%5C+They%5C+have%5C+many%5C+types%5C+and%5C+different%5C+functions.%5C+The%5C+current%5C+studies%5C+about%5C+these%5C+compounds%5C+were%5C+often%5C+focused%5C+on%5C+the%5C+chemistry%2C%5C+pharmacology%5C+and%5C+drug%5C+development.%5C+Research%5C+about%5C+their%5C+biological%5C+effects%5C+is%5C+few.%5C+Exploration%5C+the%5C+biological%5C+effects%5C+of%5C+plant%5C+secondary%5C+metabolites%5C+is%5C+important%5C+to%5C+study%5C+their%5C+biological%5C+function%5C+and%5C+application.%5C+Scutellarin%5C+is%5C+an%5C+active%5C+pharmaceutical%5C+ingredient%5C+extracted%5C+from%5C+Erigeron%5C+breviscapus%5C%28vant%5C%29%5C+Hand%5C+Mass.%5C+It%5C+is%5C+an%5C+important%5C+plant%5C+secondary%5C+metabolite%2C%5C+belonging%5C+to%5C+flavonoid.%5C+Previous%5C+studies%5C+found%5C+that%5C+some%5C+flavonoids%5C+such%5C+as%5C+quercetin%2C%5C+naringenin%5C+were%5C+auxin%5C+transport%5C+inhibitors%5C+in%5C+plants%5C+and%5C+they%5C+were%5C+related%5C+to%5C+plant%5C+growth%5C+and%5C+development%5C+closely.%5C+As%5C+an%5C+important%5C+flavonoid%2C%5C+scutellarin%5C+also%5C+plays%5C+an%5C+important%5C+role%5C+in%5C+plant%5C+growth%5C+and%5C+development%5C+is%5C+unknown.%5C+In%5C+this%5C+paper%2C%5C+scutellarin%5C+was%5C+selected%5C+as%5C+research%5C+object.%5C+Through%5C+a%5C+series%5C+of%5C+plant%5C+physiological%2C%5C+biochemical%5C+and%5C+molecular%5C+techniques%5C+to%5C+explore%5C+the%5C+biological%5C+effects%5C+of%5C+scutellarin%5C+on%5C+Arabidopsis%5C+thaliana%2C%5C+we%5C+get%5C+the%5C+results%5C+as%5C+follows%5C%3A%5C+Scutellarin%5C+had%5C+a%5C+hormone%5C-like%5C+effect%5C+on%5C+Arabidopsis%5C+thaliana.%5C+It%5C+promoted%5C+root%5C+elongation%5C+at%5C+low%5C+concentration%5C+obviously%5C%3B%5C+however%5C+the%5C+effect%5C+disappeared%5C+at%5C+high%5C+concentration.%5C+We%5C+made%5C+a%5C+further%5C+study%5C+about%5C+it%5C+and%5C+found%5C+that%5C+scutellarin%5C+had%5C+antagonism%5C+with%5C+methyl%5C+jasmonate%5C+and%5C+2%2C4%5C-dichlorophenoxy%5C+acetic%5C+acid%5C+%5C%282%2C4%5C-D%5C%29%5C+in%5C+root%5C+elongation.%5C+It%5C+also%5C+had%5C+an%5C+influence%5C+on%5C+nitrogen%5C+metabolism.%5C+Microarray%5C+results%5C+showed%5C+that%5C+the%5C+biological%5C+effects%5C+of%5C+scutellarin%5C+had%5C+a%5C+complex%5C+relationship%5C+with%5C+plant%5C+hormone%5C+and%5C+nitrogen%5C+metabolism.%5C+These%5C+were%5C+consistent%5C+with%5C+our%5C+experimental%5C+phenomenas.%5C+All%5C+these%5C+manifested%5C+that%5C+scutellarin%5C+played%5C+an%5C+important%5C+role%5C+in%5C+plant%5C+growth%5C+and%5C+development%5C+as%5C+a%5C+similar%5C+plant%5C+hormone.%5C+We%5C+tried%5C+the%5C+experiment%5C+using%5C+some%5C+other%5C+flavonoids.%5C+It%5C+was%5C+found%5C+that%5C+not%5C+all%5C+the%5C+flavonoids%5C+had%5C+the%5C+same%5C+obvious%5C+effects%5C+on%5C+root%5C+elongation%5C+like%5C+scutellarin%5C%3B%5C+the%5C+biological%5C+effects%5C+of%5C+them%5C+were%5C+closely%5C+related%5C+to%5C+their%5C+chemical%5C+structures.%5C+In%5C+addition%2C%5C+the%5C+other%5C+two%5C+aspects%5C+of%5C+research%5C+were%5C+also%5C+carried%5C+out%5C+in%5C+the%5C+paper.%5C+One%5C+was%5C+exploring%5C+the%5C+role%5C+of%5C+phospholipase%5C+D%CE%B4%5C+%5C%28PLD%CE%B4%5C%29%5C+under%5C+ultraviolet%5C+radiation%5C+in%5C+Arabidopsis.%5C+Our%5C+evidences%5C+suggested%5C+knockout%5C+PLD%CE%B4%5C+intensified%5C+membrane%5C+damage%5C+induced%5C+by%5C+UV%5C+radiation.%5C+The%5C+other%5C+one%5C+was%5C+lipid%5C+data%5C+collection%5C+and%5C+calculation%5C+of%5C+acyl%5C+chain%5C+lengths%5C+of%5C+lipid%5C+molecules%5C+in%5C+Arabidopsis%5C+under%5C+senescence%5C+induced%5C+by%5C+various%5C+stresses.%5C+We%5C+showed%5C+that%5C+the%5C+acyl%5C+chains%5C+of%5C+phosphoserine%5C+%5C%28PS%2C%5C+a%5C+head%5C-group%5C+class%5C+of%5C+membrane%5C+glycerolipids%5C+with%5C+very%5C+long%5C+chains%5C+of%5C+fatty%5C+acids.%5C%29%5C+lengthened%5C+with%5C+the%5C+development%5C+and%5C+senescence%5C+in%5C+Arabidopsis.%5C+In%5C+contrast%2C%5C+the%5C+acyl%5C+chain%5C+lengths%5C+of%5C+other%5C+major%5C+head%5C-group%5C+classes%5C+of%5C+membrane%5C+glycerolipids%5C+subtly%5C+fluctuated."},{"jsname":"lastIndexed","jscount":"2024-06-13"}],"资助项目","dc.project.title_filter")'>
1ncarville... [1]
Bambusoide... [1]
C. sinensi... [1]
Chemical i... [1]
Cold stres... [1]
During a f... [1]
更多...
收录类别
资助机构
×
知识图谱
KIB OpenIR
开始提交
已提交作品
待认领作品
已认领作品
未提交全文
收藏管理
QQ客服
官方微博
反馈留言
浏览/检索结果:
共603条，第1-10条
帮助
限定条件
专题：昆明植物所硕博研究生毕业学位论文
第一作者的第一单位
第一作者单位
通讯作者单位
已选(
0
)
清除
条数/页：
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
排序方式：
请选择
作者升序
作者降序
WOS被引频次升序
WOS被引频次降序
期刊影响因子升序
期刊影响因子降序
发表日期升序
发表日期降序
题名升序
题名降序
提交时间升序
提交时间降序
蕊木和奶子藤中生物碱类化学成分及其生物活性评价
学位论文
: 中国科学院大学, 2022
作者:
陈谌
Adobe PDF(17478Kb)
|
收藏
|
浏览/下载：107/0
|
提交时间：2024/05/14
夹竹桃科
Apocynaceae
蕊木
Kopsia arborea
奶子藤
Bousigonia mekongensis
单萜吲哚生物碱
Monoterterpene indole alkaloids
生物活性
Biological activity
类谷氨酸受体GLR3.3和GLR3.6调控拟南芥系统性抗虫响应 的机理研究
学位论文
: 中国科学院大学, 2022
作者:
薛娜
Adobe PDF(9018Kb)
|
收藏
|
浏览/下载：35/0
|
提交时间：2024/05/14
类谷氨酸受体，系统性信号，桃蚜，斜纹夜蛾
Glutamate receptor-like genes, Systemic signaling, Myzus persicae, Spodoptera litura
干热河谷特色生态修复物种筛选与农林复合系统构建
学位论文
: 中国科学院大学, 2022
作者:
赵高卷
Adobe PDF(5740Kb)
|
收藏
|
浏览/下载：18/0
|
提交时间：2024/05/14
干热河谷，种质资源，农林复合系统，抗旱机制，生物固氮，乔灌草立体修复模式，生态恢复
dry-hot valley, germplasm resources, agroforestry system, drought resistance mechanism, biological nitrogen fixation, three-dimensional trees-shrubs-herbs restoration model, ecological restoration
茄科作物种间单向不亲和机制及抗虫分子机理研究
学位论文
: 中国科学院大学, 2022
作者:
张翠萍
Adobe PDF(2701Kb)
|
收藏
|
浏览/下载：9/0
|
提交时间：2024/05/14
单向不亲和性，抗虫，番茄，马铃薯
unilateral incompatibility, insect resistant, tomato, potato
蓖麻脂滴蛋白的结构与功能分析
学位论文
: 中国科学院大学, 2022
作者:
巩宇豪
Adobe PDF(3827Kb)
|
收藏
|
浏览/下载：3/0
|
提交时间：2024/05/14
脂滴蛋白，蛋白质相互作用，油脂，脂滴，蓖麻，种子
lipid droplet protein, protein-protein interactions, lipid, lipid droplets, castor bean, seed
南欧大戟巨大戟醇酯生物合成关键基因的鉴定与功能分析
学位论文
: 中国科学院大学, 2022
作者:
李冬梅
Adobe PDF(2611Kb)
|
收藏
|
浏览/下载：11/0
|
提交时间：2024/05/14
南欧大戟
Euphorbia, Ingenol ester, Acyltransferase
巨大戟醇酯
乙酰基转移酶
三尖杉属植物生物碱成分研究和活性酯碱资源评价
学位论文
: 中国科学院大学, 2022
作者:
余光兴
Adobe PDF(2195Kb)
|
收藏
|
浏览/下载：14/0
|
提交时间：2024/05/14
三尖杉属,种子,三尖杉生物碱,分离鉴定,酯碱资源评价
Cephalotaxus,Seeds,Cephalotaxine alkaloids,Isolation and identification,Ester alkaloids resources evaluation
云南梧桐(Firmiana major)的变色花传粉功能特征及遗传结构研究
学位论文
: 中国科学院大学, 2022
作者:
马雨倩
Adobe PDF(5297Kb)
|
收藏
|
浏览/下载：9/0
|
提交时间：2024/05/14
云南梧桐，极小种群野生植物，遗传结构，花色变化，传粉特征
Firmiana major
Plant Species with Extremely Small Populations
Genetic structure
Floral color change
Pollination characteristics
山地香茶菜的化学成分及其生物活性研究
学位论文
: 中国科学院大学, 2022
作者:
邱彩玲
Adobe PDF(18572Kb)
|
收藏
|
浏览/下载：5/0
|
提交时间：2024/05/14
山地香茶菜，二萜，细胞毒，促进溶酶体功能
Isodon oresbius, Diterpenoids, Cytotoxicity, Promotion of lysosomal function
FG寡糖抗凝抗血栓作用的活性特点与机制
学位论文
: 中国科学院大学, 2022
作者:
蔡英
Adobe PDF(11671Kb)
|
收藏
|
浏览/下载：3/0
|
提交时间：2024/05/14
FG寡糖，内源性因子X酶，抗凝抗血栓活性特点，止血功能
FG oligosaccharides, Intrinsic tenase, The characteristics of anticoagulant and antithrombotic activity, Haemostatic function
