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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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ter")'>
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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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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
The Forest Filter Effect vs. Cold Trapping Effect on the AltitudinalDistribution of PCBs: A Case Study of Mt. Gongga, Eastern Tibetan Plateau
期刊论文
出版物, 3111, 期号: 0, 页码: 1-32
作者:
Xin Liu
;
Jun Li
;
Qian Zheng
;
Haijian Bing
;
Ruijie Zhang
;
Yan Wang
;
Chunling Luo
;
Xiang Liu
;
Yanhong Wu
;
Suhong Pan
;
Gan Zhang
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提交时间:2017/07/24
Olmesartan prevents cardiac rupture in mice with myocardial infarction by modulating growth differentiation factor 15 and P53
期刊论文
出版物, 3111, 期号: 0, 页码: 1-37
作者:
Baihe Chen
;
Di Lu
;
Yujuan Fu
;
Jingwen Zhang
;
Xiaobo Huang
;
Shiping Cao
;
Dingli Xu
;
Jianping Bin
;
Masafumi Kitakaze
;
Qiaobing Huang
;
Yulin Liao
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提交时间:2017/07/24
Cardiac Rupture
Olmesartan
P53
Gdf-15
Aldosterone
Myocardial Infarction
Plant-Associated Novel Didymellaceous Taxa in the South China Botanical Garden (Guangzhou, China)
期刊论文
JOURNAL OF FUNGI, 2023, 卷号: 9, 期号: 2, 页码: 182
作者:
Kularathnage,Nuwan D. D.
;
Senanayake,Indunil C. C.
;
Wanasinghe,Dhanushka N. N.
;
Doilom,Mingkwan
;
Stephenson,Steven L. L.
;
Song,Jiage
;
Dong,Wei
;
Xu,Biao
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提交时间:2024/05/09
3 new species
1 new host record
Dothideomycetes
Guangdong Province
hyaline-spored coelomycetes
Pleosporales
INCERTAE-SEDIS
LEAF-SPOT
SP. NOV.
PHOMA
FUNGI
PHYLOGENY
LETTUCE
TROPICA
CHOICE
GENERA
资源植物板蓝(Strobilanthes cusia)可持续利用的价值链研究
学位论文
, 2021
作者:
邱祖川
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浏览/下载:463/0
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提交时间:2024/03/20
Stagonosporopsis pogostemonis: A Novel Ascomycete Fungus Causing Leaf Spot and Stem Blight on Pogostemon cablin (Lamiaceae) in South China
期刊论文
PATHOGENS, 2021, 卷号: 10, 期号: 9, 页码: 1093
作者:
Dong,Zhang-Yong
;
Huang,Ying-Hua
;
Manawasinghe,Ishara S.
;
Wanasinghe,Dhanushka N.
;
Liu,Jia-Wei
;
Shu,Yong-Xin
;
Zhao,Min-Ping
;
Xiang,Mei-Mei
;
Luo,Mei
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提交时间:2022/04/02
Didymellaceae
phoma-like
pathogenicity
phylogeny
MELOIDOGYNE-INCOGNITA
1ST REPORT
PYRETHRUM
IDENTIFICATION
POPULATION
PATCHOULI
TANACETI
DISEASE
AGENTS
PLANTS
Structural characterization and anticoagulant analysis of the novel branched fucosylated glycosaminoglycan from sea cucumber Holothuria nobilis
期刊论文
CARBOHYDRATE POLYMERS, 2021, 卷号: 269, 页码: 118290
作者:
Li,Shanni
;
Zhong,Wei
;
Pan,Ying
;
Lin,Lisha
;
Cai,Ying
;
Mao,Hui
;
Zhang,Taocui
;
Li,Sujuan
;
Chen,Ru
;
Zhou,Lutan
;
Wang,Weili
;
Cui,Qinghua
;
Yin,Ronghua
;
Huang,Shengxiong
;
Zhao,Jinhua
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浏览/下载:178/19
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提交时间:2022/04/02
Disaccharide branch
Fucosylated glycosaminoglycan
Holothuria nobilis
Oligosaccharide
Anticoagulant
INTRINSIC TENASE COMPLEX
CHONDROITIN SULFATE
ACAUDINA-MOLPADIOIDEA
FACTOR XASE
HEPARIN
DEPOLYMERIZATION
OLIGOSACCHARIDES
POLYSACCHARIDES
DERIVATIVES
Isolation and identification of belamcandaoids A-N from Belamcanda chinensis seeds and their inhibition on extracellular matrix in TGF-beta 1 induced kidney proximal tubular cells
期刊论文
BIOORGANIC CHEMISTRY, 2021, 卷号: 114, 页码: 105067
作者:
Song,Ying-Ying
;
Jiang,Jian-Bing
;
Yan,Yong-Ming
;
Cheng,Yong-Xian
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提交时间:2022/04/02
Belamcanda chinensis
Triterpenoids
TGF-beta 1
Kidney proximal tubular cells
TGF-BETA
TRITERPENOIDS
CONSTITUENTS
Comprehensive Review of Tolypocladium and Description of a Novel Lineage from Southwest China
期刊论文
PATHOGENS, 2021, 卷号: 10, 期号: 11, 页码: 1389
作者:
Yu,Feng-Ming
;
Thilini Chethana,Kandawatte Wedaralalage
;
Wei,De-Ping
;
Liu,Jian-Wei
;
Zhao,Qi
;
Tang,Song-Ming
;
Li,Lu
;
Hyde,Kevin David
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提交时间:2022/04/02
new taxon
diversity
ecology
host shift
multi-gene
mycoparasite
taxonomic key
SP-NOV
PHYLOGENETIC-RELATIONSHIPS
CORDYCEPS
FUNGI
DIVERSIFICATION
PERFORMANCE
EVOLUTION
PATHOGEN
NUCLEAR
SOIL
The complete plastomes of two flowering epiparasites (Phacellaria glomerata and P. compressa): Gene content, organization, and plastome degradation
期刊论文
GENOMICS, 2021, 卷号: 113, 期号: 2, 页码: 447-455
作者:
Guo,Xiaorong
;
Liu,Changkun
;
Wang,Hengchang
;
Zhang,Guangfei
;
Yan,Hanjing
;
Jin,Lei
;
Su,Wenhua
;
Ji,Yunheng
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浏览/下载:128/17
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提交时间:2022/04/02
Amphorogynaceae
Gene loss
Mistletoe
Pseudogenization
Taxonomy
Santalales