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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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GST,p < 0.001) and low levels of seed-based gene flow. C. debaoensis (Cycadaceae) is an endangered species restricted to the border of Guangxi and Yunnan province in southwest China. This species has been classified into two types: sand and karst, according to the soil matrix they grow on. We examined chloroplast sequence variation of the cpDNA sequences from 11 populations of this species. Significant population genetic differentiation was detected (GST= 0.684 and FST = 0.74160). There was marked genetic differentiation between populations in the sand and karst regions and no expansion was detected. Climate changes during glacial periods have had significant effects on the current distribution of cycads. The molecular phylogenetic data, together with the geographic distribution of the haplotypes, suggest that C. debaoensis experienced range contraction during glacial periods, and that the current populations are still confined to the original refugia in southwest China which have favorable habitats in glacial period. These results imply that small refugia were maintained in both sand and karst regions during the LGM (last glacial maximum). This species had no postglacial recolonization and only stayed in these refugia up to now. The low within-population diversity of C. debaoensis suggests that there were strong bottleneck events or founder effects within each separate region during the Quaternary climatic oscillations. Relatively high genetic and haplotype diversities were detected in the newly discovered populations, which located at intermediate locality of sand regions and had morphological variation; this is probably the consequence of the admixture of different haplotypes colonizing the area from separate sources. C. micholitzii occurs in the Annan Highlands in central Vietnam near the Laos border. C. bifida occurs in North Vietnam; its distribution extends across the border into adjacent localities in Guangxi and Yunnan in China. For the comparability between them,theywere considered as the same species C. micholitzii by many academicians. The cpDNA sequences from 11 populations showed that these very controversial species, C. micholitzii and C. bifida, is paraphyletic and should belong to the same species C. micholitzii. AMOVA analysis showed that the component of among-population within region/species (76.46%) was unexpectedly larger than the among-species/region component (14.97%), which also indicates that there is no justification for recognizing two species as C. micholitzii and C. bifida. This hypothesis was also supported by the geological data, especially the neotectonic history of the indo-china block, which started to move south since Oligocene and cause the geographic isolation of these two groups. Therefore, the most likely explanation to the phenotypic similarities between these two groups may be the retention of ancestral polymorphisms in the paraphyletic group due to incomplete lineage sorting. Furthermore, the similarities may also be ascribed to pollen-mediated gene flow among geographically proximate populations and/or phenotypic convergence under similar selection schemes in the same region. C.micholitzi had the higest genetic diversity (HT = 0.980,) and genetic differentiation (GST = 0.830, NST = 0.915) among the C. micholitzii complex. The high genetic diversity might be attributed to its long evolutionary history, highly diverse habitats. The ineffective mode of seed dispersal and dramatic neotectonic movement in the distribution range of this species could result in the high genetic differentiation. 2. Phylogeographic analysis based on nuclear ribosomal sequences, We sequenced the nrDNA ITS in all 27 populations sampled, 7 haplotypes were identified, among which C. micholitzii had 6, while C. multipinnata, C. longipetiolula and C. debaoensis shared the remaining one. Compared to chloroplast genes, nuclear genes had higher correlation between genetic and geographical distance, but lower interspecies differentiation (54.42% vs 25.24%). Phylogeographical structure of C. micholitzii and C.bifida based on ITS Variation was consistent with the morphology differentiation. This similar in nuclear gene should be ascribed to pollen-mediated gene flow among geographically proximate populations.Long-distance gene flow over the two groups was clearly interrupted, which brought on the nrDNA genetic differenciation between the geographically isolated groups, to a certain extent affected the morphological variation. 3. Interspecies relationships among Cycas micholitzii complex, We analysed chloroplast sequence variation of the atpB-rbcL and psbA-trnH intergenic spacers in 27 populations sampled of C. micholitzii complex, AMOVA analysis showed that the component of among-species/region component (59.21%). However, phylogenic analysis showed that the haplotypes of C. micholitzii complex couldn`t grouped into four clusters closely corresponding to the narrowly defined C. micholitzi, C. multipinnata, C. debaoensis and C. longipetiolula. We concluded that the conflict may result from several factors: firstly incomplete lineage sorting of C. micholitzii; secondly hybridization/introgression of sympatrically cycads, which would be supported by evidence base on nrDNA ITS sequences; thirdly intramolecular recombination in cpDNA of cycads; eventually the neotectonic movement in the distribution range of this 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Systematics and Biogeography of Aralia L. (Araliaceae):Revision of Aralia Sects. Aralia, Humiles, Nanae, andSciadodendron
期刊论文
出版物, 3111, 卷号: 57, 期号: 0, 页码: 1-172
作者:
Jun Wen
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浏览/下载：275/7
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提交时间：2017/07/24
Aralia
Aralia Sect. Aralia
Aralia Sect. Dimorphanthus
Aralia Sect. Humiles
Aralia Sect. Nanae
Aralia Sect. pentapanax
Aralia Sect. Sciadodendron
Biogeography
Araliaceae
Systematics
Increased Catalytic Efficiency following Gene Fusion of Bifunctional MethionineSulfoxide Reductase Enzymes from Shewanella oneidensis
期刊论文
Biochemistry, 3111, 页码: 1—9
作者:
C.B. Li
;
D.M. Zhang
;
S. Ge
;
D.Y. Hong
Adobe PDF(436Kb)
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浏览/下载：156/1
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提交时间：2017/07/19
Review on factors affecting coffee volatiles: from seed to cup
期刊论文
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE, 2022, 卷号: 102, 期号: 4, 页码: 1341-1352
作者:
Wang,Xiaoyuan
;
Wang,Yanbing
;
Hu,Guilin
;
Hong,Defu
;
Guo,Tieying
;
Li,Jinhong
;
Li,Zhongrong
;
Qiu,Minghua
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浏览/下载：88/13
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提交时间：2022/04/02
aroma modification
controlled fermentation
superheated steam (SHS)
cold brew
coffee omics
STARTER CULTURES
AROMA COMPOUNDS
ROASTED COFFEE
ARABICA COFFEE
FERMENTATION
QUALITY
FLAVOR
BEANS
EXTRACTION
STORAGE
蓖麻化成生和子理究矮化形成的生理和分子机理研究
学位论文
, 2021
作者:
王再青
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浏览/下载：654/1
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提交时间：2023/11/02
Dispersal and germination of winged seeds of Brandisia hancei, a shrub in karst regions of China
期刊论文
PLANT DIVERSITY, 2021, 卷号: 43, 期号: 3, 页码: 234-238
作者:
Ren,Yongquan
;
Huang,Chengling
;
Zhang,Jiaming
;
Ma,Yongpeng
;
Tian,Xiaoling
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浏览/下载：130/0
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提交时间：2022/04/02
Anemochory
Hydrochory
Membranous wing
Seed dispersal
Winged seed
LONG-DISTANCE DISPERSAL
WIND-SPEED
TRAITS
GROWTH
MODEL
WATER
Yunnan-Guizhou Plateau: a mycological hotspot
期刊论文
PHYTOTAXA, 2021, 卷号: 523, 期号: 1, 页码: 1-31
作者:
Wijayawardene,Nalin N.
;
Dissanayake,Lakmali S.
;
Dai,Dong-Qi
;
Li,Qi-Rui
;
Xiao,Yuanpin
;
Wen,Ting-Chi
;
Karunarathna,Samantha C.
;
Wu,Hai-Xia
;
Zhang,Huang
;
Tibpromma,Saowaluck
;
Kang,Ji-Chuan
;
Wang,Yong
;
Shen,Xiang-Chun
;
Tang,Li-Zhou
;
Deng,Chun-Ying
;
Liu,Yanxia
;
Kang,Yingqian
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提交时间：2022/04/02
2 new species
polyphasic approach
six new records
species diversity
taxonomy
MULTIPLE SEQUENCE ALIGNMENT
SP-NOV
PHYLOGENETIC CLASSIFICATION
ENTOMOPATHOGENIC GENUS
MULTIGENE PHYLOGENY
FUNGI
CORDYCEPS
GENERA
DIVERSITY
LINEAGES
Rhexocercosporidium camporesii sp. nov. (Ploettnerulaceae, Helotiales) from Italy
期刊论文
PHYTOTAXA, 2021, 卷号: 482, 期号: 1, 页码: 14-24
作者:
Phutthacharoen,Kunthida
;
Chethana,K. W. Thilini
;
Phookamsak,Rungtiwa
;
Mckenzie,Eric H. C.
;
Hyde,Kevin D.
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浏览/下载：133/36
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提交时间：2022/04/02
1 new species
cup-shaped fungi
Discomycetes
Leotiomycetes
Taxonomy
MEDICAGINIS-SATIVAE
FUNGAL COMMUNITIES
GRAPEVINE
Three Novel Entomopathogenic Fungi From China and Thailand
期刊论文
FRONTIERS IN MICROBIOLOGY, 2021, 卷号: 11, 页码: 608991
作者:
Wei,De-Ping
;
Wanasinghe,Dhanushka N.
;
Xu,Jian-Chu
;
To-anun,Chaiwat
;
Mortimer,Peter E.
;
Hyde,Kevin D.
;
Elgorban,Abdallah M.
;
Madawala,Sumedha
;
Suwannarach,Nakarin
;
Karunarathna,Samantha C.
;
Tibpromma,Saowaluck
;
Lumyong,Saisamorn
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提交时间：2022/04/02
Insect fungi
Ophiocordycipitaceae
Paraisaria alba
Paraisaria arcta
Paraisaria rosea
taxonomy
Yunnan Province
MULTIPLE SEQUENCE ALIGNMENT
MULTIGENE PHYLOGENY
CORDYCEPS
OPHIOCORDYCIPITACEAE
DIVERSITY
COMBINATIONS
ASCOMYCOTA
PARAISARIA
MORPHOLOGY
ANAMORPH
Organic management practices shape the structure and associations of soil bacterial communities in tea plantations
期刊论文
APPLIED SOIL ECOLOGY, 2021, 卷号: 163, 页码: 103975
作者:
Gui,Heng
;
Fan,Lichao
;
Wang,Donghui
;
Yan,Peng
;
Li,Xin
;
Zhang,Liping
;
Han,Wenyan
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浏览/下载：93/19
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提交时间：2022/04/02
Tea
Pyrosequencing
Co-occurrence network
Crop management
Soil microbiome
LONG-TERM IMPACT
MICROBIAL DIVERSITY
CONTAMINATED SOILS
BIOMASS
PRODUCTIVITY
FRACTIONS
NUTRIENTS
NITROGEN
DYNAMICS
PATTERNS
Phylogeny and taxonomy of two new Alternaria (Ascomycota: Pleosporaceae) species in section Gypsophilae from China
期刊论文
MYCOLOGICAL PROGRESS, 2021, 卷号: 20, 期号: 4, 页码: 355-363
作者:
He,Lin
;
Cheng,Hong
;
Htun,Aye Aye
;
Ge,Hui
;
Xia,Zhen Zhou
;
Guo,Jian Wei
;
Deng,Jian Xin
;
Du,Tao
Adobe PDF(1047Kb)
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浏览/下载：104/12
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提交时间：2022/04/02
Alternaria
Morphology
Multigene
Pleosporaceae
Taxonomy
THEMES
TAXA
MODEL
NOV.
DNA
