检索结果-内蒙古大学图书馆

A revision of Elaeagnus L. (Elaeagnaceae) in mainland China

植物分类学报 2010年第5期48卷 356-390页

作者： Miao SUN Qi LIN State Key Laboratory of Systematic and Evolutionary Botany Institute of Botany Chinese Academy of Sciences Beijing 100093 China Graduate University of Chinese Academy of Sciences Beijing 100049 China State Key Laboratory of Systematic and Evolutionary Botany Institute of Botany Chinese Academy of Sciences Beijing 100093 China

A revision of Elaeagnus L. for mainland China is provided based on field observations and herbarium studies. Forty-two morphological characters are selected and coded, then the matrix is prepared following cluster analysis. Morphological characters and species delimitation are re-evaluated resulting in the recognition of 36species, one subspecies and five varieties in mainland China. Thirteen species names and three variety names are regarded as new synonyms. Species information covers full synonyms, type information, description, taxonomic remarks, distribution range, occupied habitats, examined specimens, relevant illustrations, and references to selected published illustrations and reports. A key for whole species determination is provided. The lectotypification of Elaeagnus magna(Serv.) Rehd. has been designated.

关键词： cluster analysis Elaeagnaceae Elaeagnus relationships synonymy taxonomic revision

来源：评论

学校读者我要写书评

暂无评论

Analysis of plastid and nuclear DNA data in plant phylogenetics——evaluation and improvement

引用

Science China(Life Sciences) 2014年第3期57卷 280-286页

作者： WANG Wei LI HongLei CHEN ZhiDuan State Key Laboratory of Systematic and Evolutionary Botany Institute of BotanyChinese Academy of Sciences

Correct combination of plastid(cp)and nuclear(nr)DNA data for plant phylogenetic reconstructions is not a new issue,but with an increasing number of nrDNA loci being used,it is of ever greater practical *** accurately reconstructing the phylogeny and evolutionary history of plant groups,correct treatment of phylogenetic incongruence is a vital step in the proper analysis of cpDNA and nrDNA *** first evaluated the current status of analyzing cpDNA and nrDNA data by searching all articles published in the journal systematic botany between 2005 and *** studies combining cpDNA and nrDNA data did not rigorously assess the combinability of the data sets,or did not address in detail possible reasons for incongruence between the two data *** reviewing various methods,we outline a procedure to more accurately analyze and/or combine cpDNA and nrDNA data,which includes four steps:identifying significant incongruence,determining conflicting taxa,providing possible interpretations for incongruence,and reconstructing the phylogeny after treating *** attention is given to explanation of the cause of *** hope that our procedure will help raise awareness of the importance of rigorous analysis and help identify the cause of incongruence before combining cpDNA and nrDNA data.

关键词： combined analysis plastid DNA incongruence nuclear DNA phylogenetics

来源：评论

学校读者我要写书评

暂无评论

Phylogenetic analyses reveal three new genera of the Campanulaceae

引用

植物分类学报 2014年第5期52卷 541-550页

作者： Qiang WANG Xin-Tang MA De-Yuan HONG State Key Laboratory of Systematic and Evolutionary Botany Institute of Botany Chinese Academy of Sciences Beijing 100093 China

The genus Codonopsis has been controversial in its circumscription. In the strict sense, the genus consists of three subgenera, Codonopsis , Pseudocodonopsis , and Obconicicapsula . Recent molecular and palynological analyses suggest that the latter two subgenera and Cod. purpurea Wall. are separated from rest Codonopsis . In the present study, extensive observations were carried out in wild populations and on more than 800 specimens of subg. Pseudocodonopsis , subg. Obconicicapsula , and Cod. purpurea . Their chromosome numbers were counted for the first time. Recent palynological and molecular data were also analyzed and reevaluated. Our integrated phylogenetic analyses revealed that the three groups are distinct from the rest of Codonopsis . Furthermore, they are also distinct from each other, and cannot be circumscribed in a single genus. Therefore, three new genera are here proposed based on molecular phylogenetics, palynology, cytology, and external morphology. New combinations are made in the present article.

关键词： chromosome number external morphology Himalacodon molecular phylogeny Pankycodon pollen morphology Pseudocodon

来源：评论

学校读者我要写书评

暂无评论

Revisiting the phylogeny of Ranunculeae: Implications for divergence time estimation and historical biogeography

引用

植物分类学报 2014年第5期52卷 551-565页

作者： Wei WANG Hong-Lei LI Xiao-Guo XIANG Zhi-Duan CHEN State Key Laboratory of Systematic and Evolutionary Botany Institute of Botany Chinese Academy of Sciences Beijing 100093 China

Previous studies based on different molecular datasets have generated conflicting topologies for Ranunculeae. Here, we revisit the phylogeny of Ranunculeae by analyzing the individual matK / trnK , psbJ-petA , and internal transcribed spacer (ITS) data, the combined matK / trnK , psbJ-petA , and ITS dataset, and the combined rbcL , trnL-F , matK / trnK , psbJ-petA , and ITS dataset. Based on the tree-based comparisons, BLAST searches against NCBI of the sequences, and close examination of the alignment, we found that 10 psbJ-petA sequences previously used were questionable (erroneous or problematic) and responsible for previous conflicting topologies. After omitting these questionable sequences, we provide a new phylogeny for Ranunculeae, in which Beckwithia – Cyrtorhyncha , Kumlienia , and Peltocalathos were replaced. These new replacements are supported by corresponding morphological characters. Moreover, three previously proposed intercontinental disjunct distributions within Ranunculus were also refuted. In our framework, our divergence time and biogeographic analyses indicate that divergence time estimates and the ancestral areas reconstructed for 10 of the 15 nodes in the genus-level phylogeny were influenced by elimination of the questionable sequences. The most recent common ancestor of Ranunculeae was inferred to be present in Europe and North America during the late Eocene. Clades I and II began to diversify in Europe and North America, respectively, and subsequently migrated to other continents. This study shows that it is necessary to analyze individual chloroplast DNA region datasets separately to detect questionable sequences early in the study. The combined dataset including the questionable sequences resulted in an erroneous phylogenetic tree, and the use of this tree subsequently affected age estimates and biogeographic analyses.

关键词： biogeography combined analysis divergence-time estimates phylogeny Ranunculeae

来源：评论

学校读者我要写书评

暂无评论

Gen-morph species concept—A new and integrative species concept for outbreeding organisms

引用

植物分类学报 2020年第5期58卷 725-742页

作者： De-Yuan Hong State Key Laboratory of Systematic and Evolutionary Botany Institute of Botany Chinese Academy of Sciences Beijing 100093 China

The present article briefly reviewed the prevailing species concepts,especially biological,genetic,evolutionary,phylogenetic,ecological,and several taxonomic species *** former five reflect the properties of species from diverse aspects and in different degrees,while taxonomic species concepts all contain more or less subjective elements,except for Hedberg's taxonomic method (not species concept).So far,there is no species concept that is both theoretically rational and practically *** present article outlined recent studies on the genus Paeonia L.(Paeoniaceae) in biology,particularly in morphology,biogeography,molecular phylogeny,and reproductive behavior,which provided insight into the relationship between variation of morphological characteristics and *** the study on Paeonia *** a case,0referring to studies on some other plant groups,and incorporating the merits of the prevailing species concepts into our consideration,"gen-morph species concept" is proposed here formally as new for outbreeding *** new species concept has three special features:(i) a bridge linking morphological aspect with genetic and other aspects of species;(ii) proposal of a concrete morphological criterion for species definition,and (iii) considering quantitative and qualitative characteristics as equally valuable for species definition and introducing statistics into the concept to handle such ***,the gen-morph species concept is an integrative species concept,both theoretically objective and practically operable.

关键词： continuous or discontinuous variations cross-compatible gene flow isolation lineage monophyly outbreeding organism Paeonia L. statistics

来源：评论

学校读者我要写书评

暂无评论

Variations of 18S rDNA Loci Among Six Populations of Paeonia obovata Maxim. （Paeoniaceae） Revealed by Fluorescence In Situ Hybridization

引用

Journal of Integrative Plant Biology 2006年第5期48卷 497-502页

作者： Rui Luo Chao Wang Daming Zhang State Key Laboratory of Systematic and Evolutionary Botany Institute of Botany the Chinese Academy of Sciences Beijing 100093 China

The localization of 18S ribosomal RNA genes （rDNA） by fluorescence in situ hybridization （FISH） had been performed for some species of Paeonla. However, the pattern of 18S rDNA loci among populations Is Indistinct. In the present study, we localized 18S rDNA loci on meiotic or mitotic chromosomes of six populations of Paeonla obovata Maxim. （Paeonlaceae）. Different numbers of rDNA loci were found with different diploid （2n=10） populations, namely eight （Lushl and Mt. JIuhua populations）, 10 （Mt. Talbal population）, and seven （Mt. Guandl population）, whereas tetraplold （2n=20） populations were all found with 16 loci. Aii rDNA loci were mapped near teiomeres of mitotic chromosomes and there was no chromosome with two loci. The present results show that molecular cytological polymorphlsm exists among P. obovata diploid populations, Indicating that structural variations occurred frequently during the evolutionary history of this species, accompanied with differentiation among populations.

关键词： cytotype fluorescence in situ hybridization (FISH) Paeonia obovata 18S rDNA tetraploid.

来源：评论

学校读者我要写书评

暂无评论

A comprehensive generic-level phylogeny of the sunflower family: Implications for the systematics of Chinese Asteraceae

引用

植物分类学报 2016年第4期54卷 416-437页

作者： Zhi-Xi Fu Bo-Han Jiao Bao Nie Guo-Jin Zhang Tian-Gang Gao China Phylogeny Consortium State Key Laboratory of Systematic and Evolutionary Botany Institute of Botany Chinese Academy of Sciences Beijing 10093 China University of the Chinese Academy of Sciences Beijing 100049 China State Key Laboratory of Systematic and Evolutionary Botany Institute of Botany Chinese Academy of Sciences Beijing 10093 China

The sunflower family (Asteraceae) is the largest and the most diverse flowering plant family, comprising 24 000–30 000 species and 1600–1700 genera. In China, Asteraceae are also the largest family, with approximately 2336 indigenous species in 248 genera. In the past two decades, molecular phylogenetic analyses has contributed greatly to our understanding of the systematics of Asteraceae. Nevertheless, the large-scale analyses and knowledge about the relationships of Chinese Asteraceae at the generic level as a whole are far from complete due to difficulties in sampling. In this study, we presented a three-marker ( rbcL , ndhF , and matK ) phylogeny of Asteraceae, including 506 genera (i.e., approximately one-third of Asteraceae genera). The study sampled 200 Chinese genera (i.e., approximately 80% of Chinese Asteraceae genera). The backbones of the new phylogeny were largely congruent with earlier studies, with 13 subfamilies and 45 tribes recognized. Chinese Asteraceae were distributed in 7 subfamilies (Mutisioideae, Wunderlichioideae, Carduoideae, Pertyoideae, Gymnarrhenoideae, Cichorioideae, and Asteroideae) and 22 tribes (Mutiseae, Hyalideae, Cardueae, Pertyeae, Gymnarrheneae, Vernonieae, Cichorieae, Doroniceae, Senecioneae, Astereae, Anthemideae, Gnaphalieae, Calenduleae, Inuleae, Athroismeae, Helenieae, Coreopsideae, Neurolaeneae, Tageteae, Millieae, Eupatorieae, and Heliantheae). Chinese Asteraceae lacked 6 basal subfamilies and 23 tribes. Several previously ambiguous relationships were clarified. Our analyses also resolved some unplaced genera within Chinese Asteraceae. Finally, our phylogenetic tree was used to revise the classification for all genera of Chinese Asteraceae. In total, 255 genera, 22 tribes, and 7 subfamilies in China are recognized.

关键词： Asteraceae China classification phylogeny supermatrix

来源：评论

学校读者我要写书评

暂无评论

Mechanisms underlying flower color variation in Asian species of Meconopsis: A preliminary phylogenetic analysis based on chloroplast DNA and anthocyanin biosynthesis genes

引用

植物分类学报 2014年第2期52卷 125-133页

作者： Chao ZHAO Xiao-Quan WANG Fu-Sheng YANG State Key Laboratory of Systematic and Evolutionary Botany Institute of Botany Chinese Academy of Sciences Beijing 100093 China State Key Laboratory of Systematic and Evolutionary Botany Institute of Botany Chinese Academy of Sciences Beijing 100093 China University of Chinese Academy of Sciences Beijing 100049 China

The Qinghai–Tibet Plateau (QTP) harbors the highest species diversity of alpine plants in the world, with a spectacular diversity of flower colors. Among these QTP plants, the genus Meconopsis comprises more than 50 species, for which flower color is a key diagnostic character. However, the mechanisms underlying flower color variation have rarely been investigated. In the present study, we used three chloroplast (cp) DNA fragments and two anthocyanin biosynthesis genes ( F3H and F3 ′ H ) for phylogenetic reconstruction of Meconopsis . We revealed the presence of three well-supported clades and/or subclades in the cpDNA and nuclear gene trees; further, flower color transition occurred in each lineage. The results of selection tests and preliminary expression analyses of the anthocyanin biosynthesis genes indicate that the pigment pathway leading to cyanidin is active in blue and red flowers of Meconopsis ; further, a blue–red color shift is not attributable to an on/off switching of the anthocyanin biosynthetic pathway (ABP) branches. Together with the results of previous flower pigment analyses, our findings suggest that blue–red flower color transitions in Meconopsis are attributable to modification of cyanidin. Our molecular dating results indicate that the lineage diversification in Meconopsis is closely related to the QTP uplift; thus, it is likely that environmental changes arising from the QTP uplift have played important roles in driving the diversification of flavonoids, through which species of Meconopsis have adapted physiologically to diverse habitats.

关键词： F3H F3'H flower color variation Meconopsis phylogenetic analysis Qinghai-Tibet Plateau

来源：评论

学校读者我要写书评

暂无评论

Five new series, eleven new species, and one new variety of Elatostema (Urticaceae) from China

引用

植物分类学报 2013年第2期51卷 225-228页

作者： Wen-Tsai WANG State Key Laboratory of Systematic and Evolutionary Botany Institute of Botany Chinese Academy of Scienses Beijing 100093 China

*** (***(o)ter) *** in Acta ***.17 (1):*** ***,***:Elatostema odontopterum *** diagnosis:Series nova haec est affinis *** ***,a qua bracteis staminatis externis dorso longitudinaliter angusteque 4-alatis,alis margine 2-4-rotundato-dentatis vel undulatis *** *** staminata breviter pedunculata,receptaculis parvis *** 1,occurring in southeastern Yunnan.

关键词： new species

来源：评论

学校读者我要写书评

暂无评论

Codon usage and coevolution of the large and small subunits of ribulose-1,5-bisphosphate carboxylase/oxygenase

引用

植物分类学报 2013年第5期51卷 511-521页

作者： Zhi-Yong PEI Guang-Li MU Jin PAN Da-Ming ZHANG State Key Laboratory of Systematic and Evolutionary Botany Institute of Botany Chinese Academy of Sciences Beijing 100093 China University of Chinese Academy of Sciences Beijing 100049 China State Key Laboratory of Systematic and Evolutionary Botany Institute of Botany Chinese Academy of Sciences Beijing 100093 China

As the most abundant protein on Earth, ribulose-1,5-bisphosphate carboxylase/oxygenase (RuBisCO) is the key enzyme in carbon fixation of photosynthesis in all green plants. It is hexadecimal polymer, consisting of two kinds of subunits, large and small ones, which are encoded by different genomes. The large subunit (LSU) is encoded by the chloroplast genome; the small one by the nuclear genome. The function of RuBisCO relies on the two subunits, and only when they are combined to be hexadecimal, can it carry out its whole function. However, how the LSU and small subunits evolved, and if they coevolved, has remained mysterious. In this study, based on data in 21 species, phylogenies were analyzed on two subunits, respectively, and a mirror tree was reconstructed to reveal phylogenetic similarity. Furthermore, a comparative analysis method, using the codon usage bias and correlation calculation for RuBisCO subunits, was carried out. The relative synonymous codon usage (RSCU) values of LSU and small subunits were calculated. Finally, a novel parameter, RSCU distances-based correlation ( RDC ), for evaluating molecular coevolution was proposed based on Pearson's correlation coefficient between RSCU value matrices of two subunits. The results show that the topological similarity of the mirror tree gave positive evidence of coevolution between subunits. Similarly, the RDC was high, at 0.558, revealing that the RuBisCO subunits coevolved to an extent. The results confirmed that coevolution happened between the two subunits of RuBisCO, although they were encoded by different genomes. This study added new evidence that functional constraint plays an important role in the evolution of the two subunits.

关键词： codon usage molecular coevolution RSCU distances-based correlation RuBisCO

来源：评论

学校读者我要写书评

暂无评论

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

请选择保存的检索档案：

请选择收藏分类：

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

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

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：