检索结果-南通市图书馆

Genetic characterization of the entire range of Cycas panzhihuaensis (Cycadaceae)

Plant Diversity 2020年第1期42卷 7-18页

作者： Siyue Xiao yunheng ji jian Liu Xun Gong Key Laboratory for Plant Diversity and Biogeography of East Asia Kunming Institute of BotanyChinese Academy of SciencesNo.132 Lanhei RDPanlong District.KunmingYunnan province650201 China University of Chinese Academy of Sciences No.19AYuquan RoadShijingshan DistrictBeijing100049China

Cycas panzhihuaensis *** & ***(Cycadaceae) is an endangered gymnosperm species endemic to the dry-hot valley of the jinsha River basin in southwest *** the wild *** population from Panzhihua Cycad Natural Reserve is well protected and its genetic diversity has been well assessed,the genetic characteristics of populations outside the nature reserve,which face larger risks of extinction,remain ***,the population genetics and historical dynamics of this endemic and endangered species have not been examined across its entire *** this study,to analyze the genetic diversity,phylogeographical structure and demographic history of *** from all its seven known locations,we sequenced and compared molecular data from chloroplastic DNA(psbA-trnH,psbM-trnD,and trnS-trnG),single-copy nuclear genes(PHYP,AC5,HSP70,and AAT) from 61 individuals,as well as 11 nuclear micro satellite loci(SSR) from 102 *** found relatively high genetic diversity within populations and high genetic differentiation among populations of ***,which is consistent with the patterns of other Asian inland *** no significant phylogeographical structure was detected,we found that small and unprotected populations possess higher genetic diversity and more unique haplotypes,which revises our understanding of diversity within this species and deserves due *** of demographic dynamics suggest that human activity might be the key threat to *** on the genetic characterization of ***,we propose several practical guidelines for the conservation of this species,especially for the populations with small sizes.

关键词： Cycas panzhihuaensis Conservation Genetic diversity Phylogeography Chloroplast and nuclear DNA Microsatellite

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The complete plastome of Panax stipuleanatus: Comparative and phylogenetic analyses of the genus Panax(Araliaceae)

引用

Plant Diversity 2018年第6期40卷 265-276页

作者： Changkun Liu Zhenyan Yang Lifang Yang Junbo Yang yunheng ji Key Laboratory for Plant Diversity and Biogeography of East Asia Kunming Institute of Botany Chinese Academy of Sciences School of Life Science Yunnan University Germplasm Bank of Wild Species Kunming Institute of Botany Chinese Academy of Sciences

Panax stipuleanatus(Araliaceae) is an endangered and medicinally important plant endemic to ***, phylogenetic relationships within the genus Panax have remained unclear. In this study, we sequenced the complete plastome of P. stipuleanatus and included previously reported Panax plastomes to better understand the relationships between species and plastome evolution within the genus *** plastome of P. stipuleanatus is 156,069 base pairs(bp) in length, consisting of a pair of inverted repeats(IRs, each 25,887 bp) that divide the plastome into a large single copy region(LSC, 86,126 bp) and a small single copy region(SSC, 8169 bp). The plastome contains 114 unigenes(80 protein-coding genes,30 tRNA genes, and 4 r RNA genes). Comparative analyses indicated that the plastome gene content and order, as well as the expansion/contraction of the IR regions, are all highly conserved within Panax. No significant positive selection in the plastid protein-coding genes was observed across the eight Panax species, suggesting the Panax plastomes may have undergone a strong purifying selection. Our phylogenomic analyses resulted in a phylogeny with high resolution and supports for Panax. Nine proteincoding genes and 10 non-coding regions presented high sequence divergence, which could be useful for identifying different Panax species.

关键词： Araliaceae Plastome Comparative genomics Panax stipuleanatus Phylogenomics

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Plastome phylogenomics of the East Asian endemic genus Dobinea

引用

Plant Diversity 2021年第1期43卷 35-42页

作者： Changkun Liu jin Yang Lei jin Shuying Wang Zhenyan Yang yunheng ji CAS Key Laboratory for Plant Diversity and Biogeography of East Asia Kunming Institute of BotanyChinese Academy of SciencesKunming650201China School of Life Science Yunnan UniversityKunming650091China School of Traditional Chinese Medicine Guangdong Pharmaceutical UniversityGuangzhou510006China

Dobinea is a dioecious genus endemic to East Asia that consists of two extant species:Dobinea delavayi and Dobinea *** the genus is morphologically distinct,its phylogenetic position remains *** this study,we investigated the phylogenetic relationships between Dobinea and related taxa by sequencing the whole plastome DNA sequences for both extant species of Dobinea and comparing them to published plastomes within *** complete plastomes of *** and *** were 160,683 and 160,154 base pairs(bp)in length,including a pair of inverted repeat regions(IRs,26,889 and 26,759 bp)divided by the large single-copy region(LSC,87,962 and 87,555 bp)and small single-copy region(SSC,18,943 and 19,081 bp),and identically encoded 113 unique genes(79 protein-coding genes,30 tRNAs,and 4 rRNA genes).Plastid phylogenomic analyses showed that Dobinea was a well-supported monophyletic unit and sister to the clade including tribes Anacardieae and Rhoideae,which suggests that Dobinea is a member of *** addition,molecular dating inferred *** and *** diverged approximately 10.76 Ma,suggesting the divergence between these two species may have been driven by the intensification of the Asian summer monsoon and the establishment of distinct monsoon regimes in East Asia.

关键词： Neo-endemism Divergence Dobinea delavayi Dobinea vulgaris Dobineeae Anacardiaceae

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Historical biogeography and evolutionary diversification of Lilium(Liliaceae): New insights from plastome phylogenomics

引用

Plant Diversity 2024年第2期46卷 219-228页

作者： Nian Zhou Ke Miao Changkun Liu Linbo jia jinjin Hu Yongjiang Huang yunheng ji CAS Key Laboratory for Plant Diversity and Biogeography of East Asia Kunming Institute of BotanyChinese Academy of SciencesKunmingYunnan 650201China University of Chinese Academy of Sciences Beijing 100049China Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education College of Life SciencesSichuan UniversityChengduSichuan 610065China Yunnan Key Laboratory for Integrative Conservation of Plant Species with Extremely Small Population Kunming Institute of BotanyChinese Academy of SciencesKunmingYunnan 650201China

Here, we infer the historical biogeography and evolutionary diversification of the genus Lilium. For this purpose, we used the complete plastomes of 64 currently accepted species in the genus Lilium(14plastomes were newly sequenced) to recover the phylogenetic backbone of the genus and a timecalibrated phylogenetic framework to estimate biogeographical history scenarios and evolutionary diversification rates of Lilium. Our results suggest that ancient climatic changes and geological tectonic activities jointly shaped the distribution range and drove evolutionary radiation of Lilium, including the Middle Miocene Climate Optimum(MMCO), the late Miocene global cooling, as well as the successive uplift of the Qinghai-Tibet Plateau(QTP) and the strengthening of the monsoon climate in East Asia during the late Miocene and the Pliocene. This case study suggests that the unique geological and climatic events in the Neogene of East Asia, in particular the uplift of QTP and the enhancement of monsoonal climate, may have played an essential role in formation of uneven distribution of plant diversity in the Northern Hemisphere.

关键词： Asian monsoon Climatic changes Distribution range Evolutionary complexity Radiative diversification Species diversity Qinghai-Tibet Plateau(QTP)

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Unraveling the serial glycosylation in the biosynthesis of steroidal saponins in the medicinal plant Paris polyphylla and their antifungal action

引用

Acta Pharmaceutica Sinica B 2023年第11期13卷 4638-4654页

作者： Yuegui Chen Qin Yan yunheng ji Xue Bai Desen Li Rongfang Mu Kai Guo Minjie Yang Yang Tao Jonathan Gershenzon Yan Liu Shenghong Li State Key Laboratory of Phytochemistry and Plant Resources in West China Kunming Institute of BotanyChinese Academy of SciencesKunming 650201China State Key Laboratory of Southwestern Chinese Medicine Resources Innovative Institute of Chinese Medicine and PharmacyChengdu University of Traditional Chinese MedicineChengdu 611137China Key Laboratory for Plant Diversity and Biogeography of East Asia Kunming Institute of BotanyChinese Academy of SciencesKunming 650201China Max Planck Institute for Chemical Ecology Jena D-07745Germany University of Chinese Academy of Sciences Beijing 100049China

Sugar-sugar glycosyltransferases play important roles in constructing complex and bioactive ***,we characterized a series of UDP-glycosyltransferases responsible for biosynthesizing the branched sugar chain of bioactive steroidal saponins from a widely known medicinal plant Paris polyphylla *** them,a 2'-O-rhamnosyltransferase and three 6'-O-glucosyltrasferases catalyzed a cascade of glycosylation to produce steroidal diglycosides and triglycosides,*** UDP-glycosyltransferases showed astonishing substrate promiscuity,resulting in the generation of a panel of 24 terpenoid glycosides including 15 previously undescribed compounds.A mutant library containing 44 variants was constructed based on the identification of critical residues by molecular docking simulations and protein model alignments,and a mutant UGT91AH1^(Y187A)with increased catalytic efficiency was *** steroidal saponins exhibited remarkable antifungal activity against four widespread strains of human pathogenic fungi attributed to ergosterol-dependent damage of fungal cell membranes,and 2'-O-rhamnosylation appeared to correlate with strong antifungal *** findings elucidated the biosynthetic machinery for their production of steroidal saponins and revealed their potential as new antifungal agents.

关键词： Paris polyphylla var.yunnanensis Steroidal saponins Glycosyltransferases Sugar chain elongation Antifungal activity

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

蒿属药用植物叶绿体上的psbA-trnH序列分析(英文)

引用

中国农学通报 2009年第12期25卷 46-49页

作者：刘涛纪运恒云南农业大学农学院昆明650201 中科院昆明植物研究所生物地理与物种多样性实验室昆明650204

黄花蒿是中国传统使用的抗疟药,但由于同属中的茵陈蒿、青蒿两种植物在形态上与黄花蒿非常相似,导致某些地方常用茵陈蒿、青蒿植物代替黄花蒿使用。为了给蒿属药用植物的鉴定提供科学依据,采用叶绿体上psbA-trnH序列中的信息,运用物种... 详细信息

黄花蒿是中国传统使用的抗疟药,但由于同属中的茵陈蒿、青蒿两种植物在形态上与黄花蒿非常相似,导致某些地方常用茵陈蒿、青蒿植物代替黄花蒿使用。为了给蒿属药用植物的鉴定提供科学依据,采用叶绿体上psbA-trnH序列中的信息,运用物种特异的DNA序列信息位点区分黄花蒿和常见同属植物的混淆种茵陈蒿、青蒿。结果表明黄花蒿和茵陈蒿、青蒿植物之间psbA-trnH序列虽具有较高的相似性,但也有显著的特征性的不同,可以依靠它们各自特有的信息位点区分开来。该方法首次为蒿属药用植物的分子鉴定提供了可靠、简便的参考依据。

关键词：蒿属 psbA-trnH序列鉴定

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

三川河流域滑坡的发育与分布规律

引用

水土保持学报 1989年第3期3卷 40-45页

作者：杨运恒赵济烟台师范学院地理系北京师范大学地理系

三川河流域水土流失严重,是全国重点治理流域之一。在野外实地考察的基础上,作者利用彩色红外航片对该流域的滑坡进行了全面调查。通过对5.400多处滑坡进行分析,对不同类型滑坡作了数量、面积、滑塌量的研究。研究结果表明:以三趾马红... 详细信息

三川河流域水土流失严重,是全国重点治理流域之一。在野外实地考察的基础上,作者利用彩色红外航片对该流域的滑坡进行了全面调查。通过对5.400多处滑坡进行分析,对不同类型滑坡作了数量、面积、滑塌量的研究。研究结果表明:以三趾马红土作滑床最易产生滑坡;小型滑坡的不稳定程度较高,发育的机率最大,并且主要分布于黄土冲沟中;滑坡的空间分布具有明显的区域集中性差异性;暴雨是该流域滑坡发生的主要触发条件。最后,还对滑坡防治提出了初步建议。

关键词：三川河流域滑坡发育分布

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

横断山南段上新世的植被多样性与分布格局

引用

生物多样性 2022年第11期30卷 56-69页

作者：黄永江苏涛朱海贾林波胡瑾瑾纪运恒周浙昆中国科学院昆明植物研究所东亚植物多样性与生物地理学重点实验室昆明650201 中国科学院西双版纳热带植物园热带森林生态学重点实验室云南勐腊66303 上饶师范学院生命科学学院江西上饶334001 中国科学院南京地质古生物研究所现代古生物学和地层学国家重点实验室南京210008

横断山南段复杂的地形地貌和多样的气候环境造就了高度丰富的植被多样性。这种植被多样性的演化与形成是植物学、生态学等领域共同关注的科学问题,而植物化石是回答这一科学问题的重要媒介。本文基于横断山南段的9个上新世化石植物群,... 详细信息

横断山南段复杂的地形地貌和多样的气候环境造就了高度丰富的植被多样性。这种植被多样性的演化与形成是植物学、生态学等领域共同关注的科学问题,而植物化石是回答这一科学问题的重要媒介。本文基于横断山南段的9个上新世化石植物群,根据其植物组成和优势成分,分析其所代表的植被类型,总结了该地区上新世的植被多样性与空间分布,并结合古环境研究资料,探讨该地区植被多样性的兴起,植被分布格局的形成,及其与环境变迁之间的关联。结果显示,横断山南段在上新世时期已经具有了多种植被类型,包括亚热带常绿阔叶林、亚热带落叶阔叶林、硬叶常绿阔叶林、针阔叶混交林、灌丛草地等,体现了丰富的植被多样性;植被类型从南面的偏热性植被向北面的偏温性植被逐渐转变,反映了当时随纬度变化的海拔梯度,植被类型与分布呈现出与现在高度相似的格局。同时,小范围内也具有适应于不同气候的植被类型,反映了当地较大的海拔落差,可能与高大山体的存在有着密切关联。我们推测,横断山南段现在丰富的植被多样性和随纬度变化的植被面貌最晚在上新世就已基本形成,但形成时间是否更早则需要更多、更老化石植物群的发现与研究。

关键词：横断山上新世化石植物群古植被古海拔

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Brain age estimation:premise,promise,and problems

引用

Neural Regeneration Research 2025年第8期20卷 2313-2314页

作者： Jarrad Perron ji Hyun Ko Graduate Program in Biomedical Engineering Price Faculty of EngineeringUniversity of ManitobaWinnipegMBCanada PrairieNeuro Research Centre Kleysen Institute for Advanced MedicineHealth Sciences CentreWinnipegMBCanada Department of Human Anatomy and Cell Science Rady Faculty of Health SciencesUniversity of ManitobaWinnipegMBCanada

Premise:The com bined effects of modern healthcare practices which prolong lifespan and declining birthrates have created unprecedented changes in age demographics worldwide that are especially pronounced in Japan,South Korea,Europe,and North *** old age is the most significant predictor of dementia,global healthcare systems must rise to the challenge of providing care for those with neurodegenerative disorders.

关键词： estimation providing birth

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Manufacture the conducting polymer with light

引用

Science China Chemistry 2025年第1期68卷 8-9页

作者： Yang Li Tianyu Li Yan ji Baoguang Liu College of Electronic and Optical Engineering & College of Flexible Electronics (Future Technology) Nanjing University of Posts & Telecommunications

Poly(3,4-ethylenedioxythiophene) (PEDOT), heralded as the “king” of conducting polymers, is esteemed in bioelectronics for its mixed electronic and ionic conductivity, mechanical properties compatible with biological tissues, tunable healing ability and stability in diverse environments [1]. Based on additive manufacturing of three-dimensional structures,PEDOT realizes the implementation in the efficient production of flexible bioelectronics, the construction of intricate electrode-neural implantations, and the development of smart brain-computer-interfaces [2].

关键词：

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：