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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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A new saprotrophic species of Amanita (Amanitaceae, Agaricales) from Inner Mongolia, China
期刊论文
PHYTOTAXA, 2021, 卷号: 527, 期号: 4, 页码: 284-292
作者:
Liu,Xiaoliang
;
Bau,Tolgor
;
Yang,Zhu L.
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浏览/下载：68/0
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提交时间：2022/04/02
Amanita
new species
taxonomy
molecular phylogeny
GENUS
LEPIDELLA
Niche overlap and divergence times support niche conservatism in eastern Asia-Eastern North America disjunct plants
期刊论文
GLOBAL ECOLOGY AND BIOGEOGRAPHY, 2021, 卷号: 30, 期号: 10, 页码: 1990-2003
作者:
Yin,Xue
;
Jarvie,Scott
;
Guo,Wen-Yong
;
Deng,Tao
;
Mao,Lingfeng
;
Zhang,Minhua
;
Chu,Chengjin
;
Qian,Hong
;
Svenning,Jens-Christian
;
He,Fangliang
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浏览/下载：118/59
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提交时间：2022/04/02
divergence times
EAS-ENA plant disjunction
ensemble ecological niche models
niche conservatism
niche overlap
pairwise species
SPECIES DISTRIBUTION MODELS
SAMPLE-SIZE
PSEUDO-ABSENCES
VASCULAR PLANTS
EVOLUTION
ECOLOGY
DIVERSITY
DISTRIBUTIONS
ACCURACY
ANGIOSPERMS
Immunosuppressive gentianellane-type sesterterpenoids from the traditional Uighur medicine Gentianella turkestanorum
期刊论文
PHYTOCHEMISTRY, 2021, 卷号: 187, 页码: 112780
作者:
Guo,Kai
;
Liu,Yan-Chun
;
Liu,Yan
;
Zhang,Han
;
Li,Wen-Yuan
;
Shi,Qiu-Mei
;
Li,Xiao-Nian
;
Zeng,Fang
;
Li,Sheng-Hong
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Adobe PDF(3245Kb)
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浏览/下载：78/15
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提交时间：2022/04/02
Gentianella turkestanorum
Gentianaceae
Plant sesterterpenoids
Gentianellane-type
Immunosuppressive activity
GLANDULAR TRICHOMES
LEUCOSCEPTRUM-CANUM
CONSTITUENTS
PRODUCTS
HARBOR
Plastome phylogenomics of Cephalotaxus (Cephalotaxaceae) and allied genera
期刊论文
ANNALS OF BOTANY, 2021, 卷号: 127, 期号: 5, 页码: 697-708
作者:
Ji,Yunheng
;
Liu,Changkun
;
Landis,Jacob B.
;
Deng,Min
;
Chen,Jiahui
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Adobe PDF(2975Kb)
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浏览/下载：73/17
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提交时间：2022/04/02
Gymnosperm
Cephalotaxaceae
Taxaceae
phylogeny
molecular dating
taxonomic delineation
recent speciation
QUANTITATIVE RECONSTRUCTION
PHYLOGENETIC-RELATIONSHIPS
EVOLUTIONARY HISTORY
MOLECULAR PHYLOGENY
SOUTHWEST CHINA
TAXACEAE
FLORA
CHLOROPLAST
SEQUENCE
CLIMATE
Simultaneous diversification of Polypodiales and angiosperms in the Mesozoic
期刊论文
CLADISTICS, 2021, 卷号: 37, 期号: 5, 页码: 518-539
作者:
Du,Xin-Yu
;
Lu,Jin-Mei
;
Zhang,Li-Bing
;
Wen,Jun
;
Kuo,Li-Yaung
;
Mynssen,Claudine M.
;
Schneider,Harald
;
Li,De-Zhu
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浏览/下载：84/25
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提交时间：2022/04/02
CHLOROPLAST GENOME SEQUENCE
EARLY CRETACEOUS FERNS
EUPOLYPOD II FERNS
OLDEST MACROFOSSIL
RAPID RADIATION
1ST FOSSIL
SP-NOV.
EVOLUTION
PHYLOGENY
FAMILY
An ethnobotanical study of forage plants in Zhuxi County in the Qinba mountainous area of central China
期刊论文
PLANT DIVERSITY, 2021, 卷号: 43, 期号: 3, 页码: 239-247
作者:
Yang,Jun
;
Luo,Jifeng
;
Gan,Qiliang
;
Ke,Leiyu
;
Zhang,Fengming
;
Guo,Hairu
;
Zhao,Fuwei
;
Wang,Yuehu
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Adobe PDF(1126Kb)
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浏览/下载：118/31
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提交时间：2022/04/02
Qinba mountainous area
Zhuxi county
Ethnobotany
Traditional knowledge
Pig forage plants
MITHUN BOS-FRONTALIS
INDUCED INFLAMMATION
SONCHUS-OLERACEUS
DULONGJIANG AREA
YUNNAN PROVINCE
LOCAL KNOWLEDGE
NUTRITIVE-VALUE
WILD PLANTS
ANTIOXIDANT
EXTRACT
Characterization of the complete chloroplast genome of Cycas hongheensis (Cycadaceae), an endemic species in the red river region of China
期刊论文
MITOCHONDRIAL DNA PART B-RESOURCES, 2021, 卷号: 6, 期号: 12, 页码: 3513-3514
作者:
Wu,Li-Xin
;
Wang,Yue-Hua
;
Gong,Xun
Adobe PDF(1067Kb)
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浏览/下载：84/42
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提交时间：2022/04/02
Characterization
chloroplast genome
cycads
Cycas hongheensis
Characterization of the complete chloroplast genome of Salvia trijuga Diels (Lamiaceae)
期刊论文
MITOCHONDRIAL DNA PART B-RESOURCES, 2021, 卷号: 6, 期号: 11, 页码: 3248-3249
作者:
Du,Yan
;
Wang,Yuan-yuan
;
Xiang,Chun-lei
;
Yang,Mei-qing
Adobe PDF(1067Kb)
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浏览/下载：51/15
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提交时间：2022/04/02
Salvia trijuga
complete chloroplast genome
phylogeny
TOOL
Regional disparity in extinction risk: Comparison of disjunct plant genera between eastern Asia and eastern North America
期刊论文
GLOBAL CHANGE BIOLOGY, 2021, 卷号: 27, 期号: 9, 页码: 1904-1914
作者:
Song,Houjuan
;
Ordonez,Alejandro
;
Svenning,Jens-Christian
;
Qian,Hong
;
Yin,Xue
;
Mao,Lingfeng
;
Deng,Tao
;
Zhang,Jian
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Adobe PDF(1551Kb)
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浏览/下载：52/10
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提交时间：2022/04/02
climate change
disjunct genera
extinction risk
land cover change
range shifts
species distribution modeling
Fluoxetine ameliorates depressive symptoms by regulating lncRNA expression in the mouse hippocampus
期刊论文
ZOOLOGICAL RESEARCH, 2021, 卷号: 42, 期号: 1, 页码: 28-42
作者:
Zhang,Chuan-Ling
;
Li,Yi-Jia
;
Lu,Shuang
;
Zhang,Ting
;
Xiao,Rui
;
Luo,Huai-Rong
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Adobe PDF(11037Kb)
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浏览/下载：124/13
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提交时间：2022/04/02
Depression
Elderly
Fluoxetine
LncRNA
Chronic unpredictable mild stress
LONG NONCODING RNA
NEUROTROPHIC FACTOR
MAJOR DEPRESSION
MILD STRESS
DRUG-NAIVE
PROTEIN
INFLAMMATION
MECHANISMS
BIOMARKERS
DISCOVERY
