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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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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
PROTOCOL FOR HAZELNUT SOMATICEMBRYOGENESIS
期刊论文
Protocol for Somatic Embryogenesis in Woody Plants, 3111, 期号: 0, 页码: 413-426
作者:
Berros B.
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Hasbún R.
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Radojevic L.
;
Salajova T.
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Cañal M.J.
;
R. Rodríguez
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浏览/下载：121/1
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提交时间：2017/07/24
Association of sirtuins (SIRT1-7) with lung and intestinal diseases
期刊论文
MOLECULAR AND CELLULAR BIOCHEMISTRY, 2022, 卷号: 477, 期号: 11, 页码: 2539-2552
作者:
Chen, Yuhan
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Zhou, Di
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Feng, Yuan
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Li, Bingxin
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Cui, Yong
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Chen, Gang
;
Li, Ning
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Adobe PDF(765Kb)
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浏览/下载：16/2
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提交时间：2024/04/30
Sirtuins
Lung-intestinal axis
Inflammation
Tumors
MicroRNAs
ENDOPLASMIC-RETICULUM STRESS
EPITHELIAL-MESENCHYMAL TRANSITION
CANCER CELLS
ULCERATIVE-COLITIS
COLORECTAL-CANCER
DOWN-REGULATION
PROLIFERATION
SUPPRESSES
ACTIVATION
APOPTOSIS
横断山植物物种分布区模拟技术的构建及应用
学位论文
, 2021
作者:
朱光福
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浏览/下载：10/0
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提交时间：2024/03/20
Spatiotemporal maintenance of flora in the Himalaya biodiversity hotspot: Current knowledge and future perspectives
期刊论文
ECOLOGY AND EVOLUTION, 2021, 卷号: 11, 期号: 16, 页码: 10794-10812
作者:
Wambulwa,Moses C.
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Milne,Richard
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Wu,Zeng-Yuan
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Spicer,Robert A.
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Provan,Jim
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Luo,Ya-Huang
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Zhu,Guang-Fu
;
Wang,Wan-Ting
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Wang,Hong
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Gao,Lian-Ming
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Li,De-Zhu
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Liu,Jie
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浏览/下载：173/61
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提交时间：2022/04/02
biodiversity hotspot
climate change
elevational gradient
Himalayan flora
mountain ecosystem
spatiotemporal diversification
SPECIES RICHNESS PATTERNS
QINGHAI-TIBET PLATEAU
SOUTH ASIAN MONSOON
ELEVATIONAL GRADIENT
HENGDUAN MOUNTAINS
CLIMATE-CHANGE
BETA-DIVERSITY
QUATERNARY GLACIATION
GENETIC CONSEQUENCES
ARTIFICIAL DISPERSAL
Climatic Refugia and Geographical Isolation Contribute to the Speciation and Genetic Divergence in Himalayan-Hengduan Tree Peonies (Paeonia delavayi and Paeonia ludlowii)
期刊论文
FRONTIERS IN GENETICS, 2021, 卷号: 11, 页码: 595334
作者:
Zhao,Yu-Juan
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Yin,Gen-Shen
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Pan,Yue-Zhi
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Tian,Bo
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Gong,Xun
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Adobe PDF(3084Kb)
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浏览/下载：76/14
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提交时间：2022/04/02
climate change
Himalaya-Hengduan Mountains
Paeonia
Pleistocene
refugia
speciation
EVOLUTIONARY HISTORY
SPECIES DELIMITATION
POPULATION-GENETICS
PLANT DIVERSITY
PHYLOGEOGRAPHY
CHLOROPLAST
MOUNTAINS
INFERENCE
SOFTWARE
DIVERSIFICATION
The patterns of vascular plant discoveries in China
期刊论文
ECOLOGY AND EVOLUTION, 2021, 卷号: 11, 期号: 18, 页码: 12378-12388
作者:
Lu,Muyang
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Gao,Lianming
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Li,Hongtao
;
He,Fangliang
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Adobe PDF(700Kb)
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浏览/下载：81/18
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提交时间：2022/04/02
biodiversity hot spots
botanical discovery
conservation prioritization
Flora of China
species accumulation curve
survival analysis
taxonomic efforts
SPECIES RICHNESS
BIODIVERSITY
DETERMINES
CONSERVATION
SHORTFALLS
DIVERSITY
KNOWLEDGE
AMERICAN
INSECTS
SHARKS
Snapshot of the Pliocene environment of West Kunlun region, Northwest China
期刊论文
PALAEOBIODIVERSITY AND PALAEOENVIRONMENTS, 2021, 卷号: 101, 期号: 1, 页码: 163-176
作者:
Liu,Jia
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Wang,Teng-Xiang
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Zhang,Xin-Wen
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Song,Ai
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Li,Shu-Feng
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Huang,Jian
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Spicer,Teresa
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Spicer,Robert A.
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Wu,Fei-Xiang
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Su,Tao
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Zhou,Zhe-Kun
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浏览/下载：71/17
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提交时间：2022/04/02
Palynology
Stratigraphy
Tibetan Plateau
Tarim Basin
Aridification
Demographic history and local adaptation of Myripnois dioica (Asteraceae) provide insight on plant evolution in northern China flora
期刊论文
ECOLOGY AND EVOLUTION, 2021, 卷号: 11, 期号: 12, 页码: 8000-8013
作者:
Lin,Nan
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Landis,Jacob B.
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Sun,Yanxia
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Huang,Xianhan
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Zhang,Xu
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Liu,Qun
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Zhang,Huajie
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Sun,Hang
;
Wang,Hengchang
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Deng,Tao
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Adobe PDF(1187Kb)
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浏览/下载：93/31
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提交时间：2022/04/02
demographic history
effective population size
genomic variations
local adaption
Myripnois dioica
RAD‐
seq
LANDSCAPE GENOMICS
POPULATION-GENETICS
CLIMATE-CHANGE
PHYLOGEOGRAPHY
TREE
DIFFERENTIATION
DIVERGENCE
SOFTWARE
TOOL
PALAEOVEGETATION
Uncovering the hidden taxonomic diversity of fungi in Oman
期刊论文
FUNGAL DIVERSITY, 2021, 卷号: 106, 期号: 1, 页码: 229-268
作者:
Maharachchikumbura,Sajeewa S. N.
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Wanasinghe,Dhanushka N.
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Cheewangkoon,Ratchadawan
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Al-Sadi,Abdullah M.
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浏览/下载：80/19
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提交时间：2022/04/02
14 new taxa
Ascomycota
Basidiomycota
Desert
Dothideomycetes
Patellariales
Saprobes
Schipropins A-J, structurally diverse triterpenoids from Schisandra propinqua
期刊论文
PHYTOCHEMISTRY, 2021, 卷号: 182, 页码: 112589
作者:
Ma,Ren-Fen
;
Hu,Kun
;
Ding,Wen-Ping
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Wang,Bin
;
He,Tao-Bin
;
Li,Xiao-Nian
;
Sun,Han-Dong
;
Puno,Pema-Tenzin
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浏览/下载：132/42
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提交时间：2022/04/02
Schisandra propinqua
Lanostane-type triterpenoids
Cycloartane-type triterpenoids
Cytotoxicity
Anti-inflammation
NORTRITERPENOIDS
LIGNANS
SKELETON
