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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
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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=dc.language.iso_filter%3A%E4%B8%AD%E6%96%87&sort_by=2&isNonaffiliated=false&search_type=-1&query1=Sucrose&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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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=dc.language.iso_filter%3A%E4%B8%AD%E6%96%87&sort_by=2&isNonaffiliated=false&search_type=-1&query1=Sucrose&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":"The reaction of transphosphatidylation is which phospholipase D catalyzes hydrolytic cleavage of the terminal phosphate diester bond of glycerophosphatides, transfer the phosphatidyl moiety of a phospholipids to a primary alcohol or water, producing phosphatidyl alcohol or phosphatidic acid (PtdOH). Although this reaction plays important role in regulating physical process in plants and anminals, the pathway involved in and detailed regulation mechanism are still unknown or not clear. There are three factors which can affect transphosphatidylation, substrates, enzymes and products. This paper intended to uncover the physical effect of the reaction in detail by changing two indispensable factors, the type of substrate and the PLDs. This paper consist of three researches, the first one, changing the accept substrate of the reaction aims to study the relationship between the structure of alcohols and the physical effect, to reveal the significance of the reaction; secondly, using genetic methods to regulate the expression of PLDs mediating transphosphatidylation intends to study its roles in regulating senescence; thirdly, reducing mostly PA derived from PLDs by addition 1-Butanol try to study the effect of PLD-derived PA on phosphate starvation. 1. Initial research of the effect of alcohols on the palnt growth. In this study, we study on the effect of alcohols on Arabidopsis seed germination, seeding growth and membrane lipids molecules, the metabolic procees and signaling pathway invoved in plant responding to 1-Butanol. According to the results we observed, the toxicity of alcohols and its polarity is positively correlated; the toxicity of alcohols to plants may be related with the butanoate and propanoate metabolic pathway rather than transphosphatidylation, the increase of free IAA is contributed to the resistance to 1-Butanol for WS ecotype Arabidopsis thaliana. Futhermore, five 1-Butanol insensitive mutants have obtained and the mutant sites has identified. Under the same concentration 1-Butanol stress, the five mutants are in better condition no matter physical and chemical level or cellular levels compared to wild-type Arabidopsis thaliana. It is believed that the five mutants definitely provide direct evidence for us to uncover the mechanism of the toxicity of alcohols to plants. 2. The change pattern of the membrane lipid molecules responding to the phytohormones-promoted detached Arabidopsis leaves and the role of PLDα1 and PLDδ in regulating this process. The reason for PLDα1-antisense mutant and PLDδ-knockout mutant delaying phytohormone-promoted senescence may be PLDα1 and PLDδ are response to the ABA and ethylene sinaling; PLDα1-or PLDδ-derived PA contributes to reactive oxygen species (ROS) accumulation; PLDα1-antisense mutant and PLDδ-knockout mutant have higher level of indole-3-acrtic acid (IAA) and zeatin riboside (ZR) level but lower level of abscisic acid (ABA) and jasmonic acid (JA) compared to wild-type Col and wild-type WS, respectively, which is favorable to retard the phytohormone-promoted detached leaves senescence. 3. Application tert-butanol increase the efficiency of phosphate utilization and absord when the phosphate-limited. The seedinges phosphate-starved or not exposed to 1-Butanol was subjected to lethal stress. However, in low phosphate condition, application of tert-butanol lower anthocyanin accumulation, increase the phosphate levels and the siliques number, in a word, tert-butanol attenuates the symptom of phosphate-starved induced. It is suggested that tert-Butanol can increase the utilization and absord efficiency of the limited phosphate, however, more evidences are needed to prove the mechanism.","jscount":"1","jsurl":"/simple-search?field1=all&rpp=10&accurate=false&advanced=false&fq=dc.language.iso_filter%3A%E4%B8%AD%E6%96%87&sort_by=2&isNonaffiliated=false&search_type=-1&query1=Sucrose&order=desc&&fq=dc.project.title_filter%3AThe%5C+reaction%5C+of%5C+transphosphatidylation%5C+is%5C+which%5C+phospholipase%5C+D%5C+catalyzes%5C+hydrolytic%5C+cleavage%5C+of%5C+the%5C+terminal%5C+phosphate%5C+diester%5C+bond%5C+of%5C+glycerophosphatides%2C%5C+transfer%5C+the%5C+phosphatidyl%5C+moiety%5C+of%5C+a%5C+phospholipids%5C+to%5C+a%5C+primary%5C+alcohol%5C+or%5C+water%2C%5C+producing%5C+phosphatidyl%5C+alcohol%5C+or%5C+phosphatidic%5C+acid%5C+%5C%28PtdOH%5C%29.%5C+Although%5C+this%5C+reaction%5C+plays%5C+important%5C+role%5C+in%5C+regulating%5C+physical%5C+process%5C+in%5C+plants%5C+and%5C+anminals%2C%5C+the%5C+pathway%5C+involved%5C+in%5C+and%5C+detailed%5C+regulation%5C+mechanism%5C+are%5C+still%5C+unknown%5C+or%5C+not%5C+clear.%5C+There%5C+are%5C+three%5C+factors%5C+which%5C+can%5C+affect%5C+transphosphatidylation%2C%5C+substrates%2C%5C+enzymes%5C+and%5C+products.%5C+This%5C+paper%5C+intended%5C+to%5C+uncover%5C+the%5C+physical%5C+effect%5C+of%5C+the%5C+reaction%5C+in%5C+detail%5C+by%5C+changing%5C+two%5C+indispensable%5C+factors%2C%5C+the%5C+type%5C+of%5C+substrate%5C+and%5C+the%5C+PLDs.%5C+This%5C+paper%5C+consist%5C+of%C2%A0three%5C+researches%2C%5C+the%5C+first%5C+one%2C%5C+changing%5C+the%5C+accept%5C+substrate%5C+of%5C+the%5C+reaction%5C+aims%5C+to%5C+study%5C+the%5C+relationship%5C+between%5C+the%5C+structure%5C+of%5C+alcohols%5C+and%5C+the%5C+physical%5C+effect%2C%5C+to%5C+reveal%5C+the%5C+significance%5C+of%5C+the%5C+reaction%5C%3B%5C+secondly%2C%5C+using%5C+genetic%5C+methods%5C+to%5C+regulate%5C+the%5C+expression%5C+of%5C+PLDs%5C+mediating%5C+transphosphatidylation%5C+intends%5C+to%5C+study%5C+its%5C+roles%5C+in%5C+regulating%5C+senescence%5C%3B%5C+thirdly%2C%5C+reducing%5C+mostly%5C+PA%5C+derived%5C+from%5C+PLDs%5C+by%5C+addition%5C+1%5C-Butanol%5C+try%5C+to%5C+study%5C+the%5C+effect%5C+of%5C+PLD%5C-derived%5C+PA%5C+on%5C+phosphate%5C+starvation.%5C+1.%5C+Initial%5C+research%5C+of%5C+the%5C+effect%5C+of%5C+alcohols%5C+on%5C+the%5C+palnt%5C+growth.%5C+In%5C+this%5C+study%2C%5C+we%5C+study%5C+on%5C+the%5C+effect%5C+of%5C+alcohols%5C+on%5C+Arabidopsis%5C+seed%5C+germination%2C%5C+seeding%5C+growth%5C+and%5C+membrane%5C+lipids%5C+molecules%2C%5C+the%5C+metabolic%5C+procees%5C+and%5C+signaling%5C+pathway%5C+invoved%5C+in%5C+plant%5C+responding%5C+to%5C+1%5C-Butanol.%5C+According%5C+to%5C+the%5C+results%5C+we%5C+observed%2C%5C+the%5C+toxicity%5C+of%5C+alcohols%5C+and%5C+its%5C+polarity%5C+is%5C+positively%5C+correlated%5C%3B%5C+the%5C+toxicity%5C+of%5C+alcohols%5C+to%5C+plants%5C+may%5C+be%5C+related%5C+with%5C+the%5C+butanoate%5C+and%5C+propanoate%5C+metabolic%5C+pathway%5C+rather%5C+than%5C+transphosphatidylation%2C%5C+the%5C+increase%5C+of%5C+free%5C+IAA%5C+is%5C+contributed%5C+to%5C+the%5C+resistance%5C+to%5C+1%5C-Butanol%5C+for%5C+WS%5C+ecotype%5C+Arabidopsis%5C+thaliana.%5C+Futhermore%2C%5C+five%5C+1%5C-Butanol%5C+insensitive%5C+mutants%5C+have%5C+obtained%5C+and%5C+the%5C+mutant%5C+sites%5C+has%5C+identified.%5C+Under%5C+the%5C+same%5C+concentration%5C+1%5C-Butanol%5C+stress%2C%5C+the%5C+five%5C+mutants%5C+are%5C+in%5C+better%5C+condition%5C+no%5C+matter%5C+physical%5C+and%5C+chemical%5C+level%5C+or%5C+cellular%5C+levels%5C+compared%5C+to%5C+wild%5C-type%5C+Arabidopsis%5C+thaliana.%5C+It%5C+is%5C+believed%5C+that%5C+the%5C+five%5C+mutants%5C+definitely%5C+provide%5C+direct%5C+evidence%5C+for%5C+us%5C+to%5C+uncover%5C+the%5C+mechanism%5C+of%5C+the%5C+toxicity%5C+of%5C+alcohols%5C+to%5C+plants.%5C+2.%5C+The%5C+change%5C+pattern%5C+of%5C+the%5C+membrane%5C+lipid%5C+molecules%5C+responding%5C+to%5C+the%5C+phytohormones%5C-promoted%5C+detached%5C+Arabidopsis%5C+leaves%5C+and%5C+the%5C+role%5C+of%5C+PLD%CE%B11%5C+and%5C+PLD%CE%B4%5C+in%5C+regulating%5C+this%5C+process.%5C+The%5C+reason%5C+for%5C+PLD%CE%B11%5C-antisense%5C+mutant%5C+and%5C+PLD%CE%B4%5C-knockout%5C+mutant%5C+delaying%5C+phytohormone%5C-promoted%5C+senescence%5C+may%5C+be%5C+PLD%CE%B11%5C+and%5C+PLD%CE%B4%5C+are%5C+response%5C+to%5C+the%5C+ABA%5C+and%5C+ethylene%5C+sinaling%5C%3B%5C+PLD%CE%B11%5C-or%5C+PLD%CE%B4%5C-derived%5C+PA%5C+contributes%5C+to%5C+reactive%5C+oxygen%5C+species%5C+%5C%28ROS%5C%29%5C+accumulation%5C%3B%5C+PLD%CE%B11%5C-antisense%5C+mutant%5C+and%5C+PLD%CE%B4%5C-knockout%5C+mutant%5C+have%5C+higher%5C+level%5C+of%5C+indole%5C-3%5C-acrtic%5C+acid%5C+%5C%28IAA%5C%29%5C+and%5C+zeatin%5C+riboside%5C+%5C%28ZR%5C%29%5C+level%5C+but%5C+lower%5C+level%5C+of%5C+abscisic%5C+acid%5C+%5C%28ABA%5C%29%5C+and%5C+jasmonic%5C+acid%5C+%5C%28JA%5C%29%5C+compared%5C+to%5C+wild%5C-type%5C+Col%5C+and%5C+wild%5C-type%5C+WS%2C%5C+respectively%2C%5C+which%5C+is%5C+favorable%5C+to%5C+retard%5C+the%5C+phytohormone%5C-promoted%5C+detached%5C+leaves%5C+senescence.%5C+3.%5C+Application%5C+tert%5C-butanol%5C+increase%5C+the%5C+efficiency%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thesis deals with the research work on the chemical constituents of Camellia taliensis, Camellia pachyandra, Camellia oleifera, Metapanax delavayi , Pu-er tea (Camellia sinensis var. assamica) and one of the dominant microorganisms in the post-fermentation of Pu-er tea, Aspergillus japonicus var. japonicus through the systematic phytochemical methods. By the modern techniques of chromatography, spectroscopy along with chemical degradation methods, 107 compounds were isolated and identified by MS, 1D and 2D NMR spectra along with other spectroscopic method along with chemical degradation. The compounds include hydrolysable tannins, flavan-3ols, flavonoid glycosides, triterpene glycosides, simple phenolics and so on, most of which were evaluated by antioxidant or anti-viral activities. Meantime, the HPLC analytical methods were applied to compare the chemical constituents of C. taliensis and C. pachyandra with with those of the cultivated tea, C. sinensis var. assamica. Above all, the detection methods were established for the analysis of tea polyphenols, tea polysaccharides, caffeine and the main polyphenolic constituents in tea. And finally, the progress of the research work on Pu-er tea was reviewed.","jscount":"1","jsurl":"/simple-search?field1=all&rpp=10&accurate=false&advanced=false&fq=dc.language.iso_filter%3A%E4%B8%AD%E6%96%87&sort_by=2&isNonaffiliated=false&search_type=-1&query1=Sucrose&order=desc&&fq=dc.project.title_filter%3AThis%5C+thesis%5C+deals%5C+with%5C+the%5C+research%5C+work%5C+on%5C+the%5C+chemical%5C+constituents%5C+of%5C+Camellia%5C+taliensis%2C%5C+Camellia%5C+pachyandra%2C%5C+Camellia%5C+oleifera%2C%5C+Metapanax%5C+delavayi%5C+%2C%5C+Pu%5C-er%5C+tea%5C+%5C%28Camellia%5C+sinensis%5C+var.%5C+assamica%5C%29%5C+and%5C+one%5C+of%5C+the%5C+dominant%5C+microorganisms%5C+in%5C+the%5C+post%5C-fermentation%5C+of%5C+Pu%5C-er%5C+tea%2C%5C+Aspergillus%5C+japonicus%5C+var.%5C+japonicus%5C+through%5C+the%5C+systematic%5C+phytochemical%5C+methods.%5C+By%5C+the%5C+modern%5C+techniques%5C+of%5C+chromatography%2C%5C+spectroscopy%5C+along%5C+with%5C+chemical%5C+degradation%5C+methods%2C%5C+107%5C+compounds%5C+were%5C+isolated%5C+and%5C+identified%5C+by%5C+MS%2C%5C+1D%5C+and%5C+2D%5C+NMR%5C+spectra%5C+along%5C+with%5C+other%5C+spectroscopic%5C+method%5C+along%5C+with%5C+chemical%5C+degradation.%5C+The%5C+compounds%5C+include%5C+hydrolysable%5C+tannins%2C%5C+flavan%5C-3ols%2C%5C+flavonoid%5C+glycosides%2C%5C+triterpene%5C+glycosides%2C%5C+simple%5C+phenolics%5C+and%5C+so%5C+on%2C%5C+most%5C+of%5C+which%5C+were%5C+evaluated%5C+by%5C+antioxidant%5C+or%5C+anti%5C-viral%5C+activities.%5C+Meantime%2C%5C+the%5C+HPLC%5C+analytical%5C+methods%5C+were%5C+applied%5C+to%5C+compare%5C+the%5C+chemical%5C+constituents%5C+of%5C+C.%5C+taliensis%5C+and%5C+C.%5C+pachyandra%5C+with%5C+with%5C+those%5C+of%5C+the%5C+cultivated%5C+tea%2C%5C+C.%5C+sinensis%5C+var.%5C+assamica.%5C+Above%5C+all%2C%5C+the%5C+detection%5C+methods%5C+were%5C+established%5C+for%5C+the%5C+analysis%5C+of%5C+tea%5C+polyphenols%2C%5C+tea%5C+polysaccharides%2C%5C+caffeine%5C+and%5C+the%5C+main%5C+polyphenolic%5C+constituents%5C+in%5C+tea.%5C+And%5C+finally%2C%5C+the%5C+progress%5C+of%5C+the%5C+research%5C+work%5C+on%5C+Pu%5C-er%5C+tea%5C+was%5C+reviewed."},{"jsname":"Trigonobalanus doichangensis is an endangered plant. In this paper, the megasporogenesis and development of female gametophyte, seed morphological traits and seed germination, seed conservation, micropropagation and acclimatization of this species were studied. Combined with the published results of cytology, molecular genetics and other researches,the mechanisms of extinction, basic biology and technology of germplasm conservation and acclimatization of T. doichangensis were discussed. The main results are summarized as follows:1. Megasporogenesis and development of female gametophyte,Stamens exist under the stigma of T. doichangensis, and the pollen is aborted on the later development stage of pistil, therefore, the pistillate flower in function is hermaphrodite flower in morphology. The ovule is anatropous, bitegmic and crassinucellate. The primary archesporium is hypodermal and single-celled and the sporogenous cell of the nucellus functions directly as a megaspore mother cell which goes meiosis to form a linear tetrad. The chalazal megaspore of the tetrad is functional. The development of embryo sac conforms to the polygonum type. There are six ovules in the ovary of T. doichangensis, and only one develops into a seed in normal fruits. In the process of megasporogenesis and development of female gametophyte, there are several links of abortion, and 93.3% of mature embryo sacs is aborted.2. Morphological characters and germination of seeds,Most of the variation occurred among individual trees within populations in seed morphological traits (length, width and 1000-seed weight) and germination-related indices (germination percentage, germination index and vigor index). In addition, the variation in percentage of well-developed seeds among populations and among individual trees within populations is equal, each accounting for 48%. Each of seed morphological traits has significantly positive correlation with each other (p < 0.01), but they have no significant correlation with percentage of well-developed seeds and germination-related indices. In the same batch of seeds of T. doichangensis, there are light-colored and dark-colored seed coats, and development of light-colored seeds is significantly poorer than that of dark-colored seeds.The sensitivity of seeds to high temperature varys in different stages of seed imbibition. In each stage, heat acclimatization don’t increase germination percentage, germination index and fresh weight of seedlings. If the distilled water is substituted by solution of SA during seed imbibition, seed germination and germination index after heat shock are not significantly different from control, but they are significantly higher than that of other treatments. Moreover, when the seeds are treatmented with SA, the fresh weight of seedlings is significantly higher than that of control and other treatments.3. Seed conservation,Seeds of T. doichangensis belong to orthodox seeds which can tolerate certain level of dehydration. The condition of low temperature and low water content of seeds is conducive to seed conservation.Germination of fresh seeds shows significant variation among populations, howerer, germination of the seeds after storage for one year in room temperature shows no significant variation among populations.High temperature and high relative humidity damages the seeds more severely than high temperature does. In addition, low water content of seeds enable the seeds to be more tolerant to high temperature.The electrical conductivity, dehydrogenase activity and germination percentage have no significant correlation with each other.4. Micropropagation and in vitro conservation,Cotyledonary nodes are a kind of efficient explants. Low salt media are conducive to shoot propagation and root induction.The maximum multiplication rate (20-25 shoots/explant within 4 months) is achieved on quarter-strength Murashige and Skoog (1/4 MS) medium supplemented with 1 mg·L-1 6-benzyladenine (6-BA) and 0.05 mg·L-1 α-naphthaleneacetic acid (NAA).Rooting is promoted by auxins, however, IBA alone or low concentrations of NAA are preferable due to small amount of callus induced. The research has established an efficient protocol for micropropagation of T. doichangensis, and it provides technology support for in vitro conservation of special germplasm of the species.5. Acclimatization,Quercus variabilis, Cyclobalanopsis glaucoides and T. doichangensis belong to the family of Fagaceae, and the natural distribution ranges of the 3 species are decreasing in turn. The research suggests that the ranges of temperature tolerance of the 3 species are decreasing corresponding to their distribution ranges.The high and low semi-lethal temperature of one-year old T. doichangensis is 49.5℃ and -5℃ respectively. It suggests that T. doichangensis has a wide range of basic temperature tolerance. Short-term heat and cold acclimatization cannot expand the range of temperature tolerance. It can be inferred that T. doichangensis may lack induced tolerance to temperature. Under proper conditions, ABA can increase the cold tolerance, and SA can increase the heat tolerance of leaf discs of T. doichangensis.","jscount":"1","jsurl":"/simple-search?field1=all&rpp=10&accurate=false&advanced=false&fq=dc.language.iso_filter%3A%E4%B8%AD%E6%96%87&sort_by=2&isNonaffiliated=false&search_type=-1&query1=Sucrose&order=desc&&fq=dc.project.title_filter%3ATrigonobalanus%5C+doichangensis%5C+is%5C+an%5C+endangered%5C+plant.%5C+In%5C+this%5C+paper%2C%5C+the%5C+megasporogenesis%5C+and%5C+development%5C+of%5C+female%5C+gametophyte%2C%5C+seed%5C+morphological%5C+traits%5C+and%5C+seed%5C+germination%2C%5C+seed%5C+conservation%2C%5C+micropropagation%5C+and%5C+acclimatization%5C+of%5C+this%5C+species%5C+were%5C+studied.%5C+Combined%5C+with%5C+the%5C+published%5C+results%5C+of%5C+cytology%2C%5C+molecular%5C+genetics%5C+and%5C+other%5C+researches%2Cthe%5C+mechanisms%5C+of%5C+extinction%2C%5C+basic%5C+biology%5C+and%5C+technology%5C+of%5C+germplasm%5C+conservation%5C+and%5C+acclimatization%5C+of%5C+T.%5C+doichangensis%5C+were%5C+discussed.%5C+The%5C+main%5C+results%5C+are%5C+summarized%5C+as%5C+follows%5C%3A1.%5C+Megasporogenesis%5C+and%5C+development%5C+of%5C+female%5C+gametophyte%EF%BC%8CStamens%5C+exist%5C+under%5C+the%5C+stigma%5C+of%5C+T.%5C+doichangensis%2C%5C+and%5C+the%5C+pollen%5C+is%5C+aborted%5C+on%5C+the%5C+later%5C+development%5C+stage%5C+of%5C+pistil%2C%5C+therefore%2C%5C+the%5C+pistillate%5C+flower%5C+in%5C+function%5C+is%5C+hermaphrodite%5C+flower%5C+in%5C+morphology.%5C+The%5C+ovule%5C+is%5C+anatropous%2C%5C+bitegmic%5C+and%5C+crassinucellate.%5C+The%5C+primary%5C+archesporium%5C+is%5C+hypodermal%5C+and%5C+single%5C-celled%5C+and%5C+the%5C+sporogenous%5C+cell%5C+of%5C+the%5C+nucellus%5C+functions%5C+directly%5C+as%5C+a%5C+megaspore%5C+mother%5C+cell%5C+which%5C+goes%5C+meiosis%5C+to%5C+form%5C+a%5C+linear%5C+tetrad.%5C+The%5C+chalazal%5C+megaspore%5C+of%5C+the%5C+tetrad%5C+is%5C+functional.%5C+The%5C+development%5C+of%5C+embryo%5C+sac%5C+conforms%5C+to%5C+the%5C+polygonum%5C+type.%5C+There%5C+are%5C+six%5C+ovules%5C+in%5C+the%5C+ovary%5C+of%5C+T.%5C+doichangensis%2C%5C+and%5C+only%5C+one%5C+develops%5C+into%5C+a%5C+seed%5C+in%5C+normal%5C+fruits.%5C+In%5C+the%5C+process%5C+of%5C+megasporogenesis%5C+and%5C+development%5C+of%5C+female%5C+gametophyte%2C%5C+there%5C+are%5C+several%5C+links%5C+of%5C+abortion%2C%5C+and%5C+93.3%25%5C+of%5C+mature%5C+embryo%5C+sacs%5C+is%5C+aborted.2.%5C+Morphological%5C+characters%5C+and%5C+germination%5C+of%5C+seeds%EF%BC%8CMost%5C+of%5C+the%5C+variation%5C+occurred%5C+among%5C+individual%5C+trees%5C+within%5C+populations%5C+in%5C+seed%5C+morphological%5C+traits%5C+%5C%28length%2C%5C+width%5C+and%5C+1000%5C-seed%5C+weight%5C%29%5C+and%5C+germination%5C-related%5C+indices%5C+%5C%28germination%5C+percentage%2C%5C+germination%5C+index%5C+and%5C+vigor%5C+index%5C%29.%5C+In%5C+addition%2C%5C+the%5C+variation%5C+in%5C+percentage%5C+of%5C+well%5C-developed%5C+seeds%5C+among%5C+populations%5C+and%5C+among%5C+individual%5C+trees%5C+within%5C+populations%5C+is%5C+equal%2C%5C+each%5C+accounting%5C+for%5C+48%25.%5C+Each%5C+of%5C+seed%5C+morphological%5C+traits%5C+has%5C+significantly%5C+positive%5C+correlation%5C+with%5C+each%5C+other%5C+%5C%28p%5C+%3C%5C+0.01%5C%29%2C%5C+but%5C+they%5C+have%5C+no%5C+significant%5C+correlation%5C+with%5C+percentage%5C+of%5C+well%5C-developed%5C+seeds%5C+and%5C+germination%5C-related%5C+indices.%5C+In%5C+the%5C+same%5C+batch%5C+of%5C+seeds%5C+of%5C+T.%5C+doichangensis%2C%5C+there%5C+are%5C+light%5C-colored%5C+and%5C+dark%5C-colored%5C+seed%5C+coats%2C%5C+and%5C+development%5C+of%5C+light%5C-colored%5C+seeds%5C+is%5C+significantly%5C+poorer%5C+than%5C+that%5C+of%5C+dark%5C-colored%5C+seeds.The%5C+sensitivity%5C+of%5C+seeds%5C+to%5C+high%5C+temperature%5C+varys%5C+in%5C+different%5C+stages%5C+of%5C+seed%5C+imbibition.%5C+In%5C+each%5C+stage%2C%5C+heat%5C+acclimatization%5C+don%E2%80%99t%5C+increase%5C+germination%5C+percentage%2C%5C+germination%5C+index%5C+and%5C+fresh%5C+weight%5C+of%5C+seedlings.%5C+If%5C+the%5C+distilled%5C+water%5C+is%5C+substituted%5C+by%5C+solution%5C+of%5C+SA%5C+during%5C+seed%5C+imbibition%2C%5C+seed%5C+germination%5C+and%5C+germination%5C+index%5C+after%5C+heat%5C+shock%5C+are%5C+not%5C+significantly%5C+different%5C+from%5C+control%2C%5C+but%5C+they%5C+are%5C+significantly%5C+higher%5C+than%5C+that%5C+of%5C+other%5C+treatments.%5C+Moreover%2C%5C+when%5C+the%5C+seeds%5C+are%5C+treatmented%5C+with%5C+SA%2C%5C+the%5C+fresh%5C+weight%5C+of%5C+seedlings%5C+is%5C+significantly%5C+higher%5C+than%5C+that%5C+of%5C+control%5C+and%5C+other%5C+treatments.3.%5C+Seed%5C+conservation%EF%BC%8CSeeds%5C+of%5C+T.%5C+doichangensis%5C+belong%5C+to%5C+orthodox%5C+seeds%5C+which%5C+can%5C+tolerate%5C+certain%5C+level%5C+of%5C+dehydration.%5C+The%5C+condition%5C+of%5C+low%5C+temperature%5C+and%5C+low%5C+water%5C+content%5C+of%5C+seeds%5C+is%5C+conducive%5C+to%5C+seed%5C+conservation.Germination%5C+of%5C+fresh%5C+seeds%5C+shows%5C+significant%5C+variation%5C+among%5C+populations%2C%5C+howerer%2C%5C+germination%5C+of%5C+the%5C+seeds%5C+after%5C+storage%5C+for%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德氏兜兰和亨利兜兰成花诱导机制初探
学位论文
: 中国科学院大学, 2022
作者:
熊进
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兜兰
Paphiopedilum
成花启动
Floral inducion
成花诱导
Flower evocation
温度
Temperature
可变剪接与无义介导的 mRNA 降解对玛咖(Lepidium meyenii)高寒适应性作用的研究
学位论文
博士, 2018
作者:
石勇
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中国植物学会八十五周年学术年会论文集摘要汇编
会议录
会议录编者:
植物学会
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提交时间:2018/10/24
12th全国天然有机化学学术会议摘要集
会议录
会议录编者:
中国化学会
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浏览/下载:197/8
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提交时间:2018/10/24
拟南芥AFPs家族调控开花时间的分子机制研究
学位论文
博士, 2018
作者:
常贯晓
Adobe PDF(5069Kb)
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浏览/下载:61/2
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提交时间:2021/01/05
南方菟丝子 (Cuscuta australis R. Br.) 与大豆(Glycine max (Linn.) Merr.) 寄生体系的转录组学研究
学位论文
博士, 2018
作者:
庄会富
Adobe PDF(17451Kb)
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提交时间:2021/01/05
三七种子后熟的形态学 和转录组学研究
学位论文
硕士, 2018
作者:
宋红玉
Adobe PDF(4322Kb)
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浏览/下载:45/3
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提交时间:2021/01/05
甘肃马先蒿吸器发生与调控及毛根转化体系建立初探
学位论文
硕士, 2018
作者:
向蕾
Adobe PDF(2501Kb)
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浏览/下载:79/1
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提交时间:2021/01/05
拟南芥 AGL16 与 MYB44 分子遗传互作及对开花、适应的影响
学位论文
硕士, 2018
作者:
钱富明
Adobe PDF(2972Kb)
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浏览/下载:71/2
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提交时间:2021/01/05
JA-Ile羟基化酶基因在创制高抗虫性作物中的应用
学位论文
硕士, 2018
作者:
杨飞
Microsoft Word(4253Kb)
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浏览/下载:46/0
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提交时间:2021/01/05