Inaccessible Biodiversity on Limestone Cliffs: Aster tianmenshanensis (Asteraceae), a New Critically Endangered Species from China

doi:10.1371/journal.pone.0134895

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	Inaccessible Biodiversity on Limestone Cliffs: Aster tianmenshanensis (Asteraceae), a New Critically Endangered Species from China
	Zhang, Guo-Jin ; Hu, Hai-Hua ; Zhang, Cai-Fei ; Tian, Xiao-Juan ; Peng, Hui 2; Gao, Tian-Gang
刊名	PLOS ONE
	2015
卷号	10 期号:8
ISSN号	1932-6203
DOI	10.1371/journal.pone.0134895
文献子类	Article
英文摘要	Aster tianmenshanensis G. J. Zhang & T. G. Gao, a new species of Asteraceae from southern China is described and illustrated based on evidence from morphology, micromorphology and molecular phylogeny. The new species is superficially similar to Aster salwinensis Onno in having rosettes of spatulate leaves and a solitary, terminal capitulum, but it differs by its glabrous leaf margins, unequal disc floret lobes and 1-seriate pappus. The molecular phylogenetic analysis, based on nuclear sequences ITS, ETS and chloroplast sequence trnL-F, showed that the new species was nested within the genus Aster and formed a well supported clade with Aster verticillatus (Reinw.) Brouillet et al. The new species differs from the latter in having unbranched stems, much larger capitula, unequal disc floret lobes, beakless achenes and persistent pappus. In particular, A. tianmenshanensis has very short stigmatic lines, only ca. 0.18 mm long and less than 1/3 of the length of sterile style tip appendages, remarkably different from its congeners. This type of stigmatic line, as far as we know, has not been found in any other species of Aster. The very short stigmatic lines plus the unequal disc floret lobes imply that the new species may have a very specialized pollination system, which may be a consequence of habitat specialization. The new species grows only on the limestone cliffs of Mt. Tianmen, Hunan Province, at the elevation of 1400 m. It could only be accessed when a plank walkway was built across the cliffs for tourists. As it is known only from an area estimated at less than 10 km(2) and a walkway passes through this location, its habitat could be easily disturbed. This species should best be treated as Critically Endangered based on the International Union for Conservation of Nature Red List Categories and Criteria B2a.
学科主题	Multidisciplinary Sciences
出版地	SAN FRANCISCO
WOS关键词	EXTERNAL TRANSCRIBED SPACER ; PHYLOGENETIC UTILITY ; 18S-26S RDNA ; ETS ; AMPLIFICATION
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
语种	英语
出版者	PUBLIC LIBRARY SCIENCE
WOS记录号	WOS:000360069400040
资助机构	National Natural Science Foundation of China [31270237, 31110103911] ; S T Basic Work [2013FY112100] ; External Cooperation Program of BIC ; Chinese Academy of Sciences [GJHZ 201321]
内容类型	期刊论文
源URL	[http://ir.ibcas.ac.cn/handle/2S10CLM1/26007]
专题	系统与进化植物学国家重点实验室
作者单位	1.Hu, Hai-Hua 2.[Tian, Xiao-Juan 3.Tianmenshan Natl Forest Pk, Zhangjiajie 427300, Hunan, Peoples R China 4.Chinese Acad Sci, Inst Bot, State Key Lab Systemat & Evolutionary Bot, Beijing 100093, Peoples R China 5.Univ Chinese Acad Sci, Beijing 100039, Peoples R China 6.[Zhang, Guo-Jin 7.Zhang, Cai-Fei
推荐引用方式 GB/T 7714	Zhang, Guo-Jin,Hu, Hai-Hua,Zhang, Cai-Fei,et al. Inaccessible Biodiversity on Limestone Cliffs: Aster tianmenshanensis (Asteraceae), a New Critically Endangered Species from China[J]. PLOS ONE,2015,10(8).
APA	Zhang, Guo-Jin,Hu, Hai-Hua,Zhang, Cai-Fei,Tian, Xiao-Juan,Peng, Hui,&Gao, Tian-Gang.(2015).Inaccessible Biodiversity on Limestone Cliffs: Aster tianmenshanensis (Asteraceae), a New Critically Endangered Species from China.PLOS ONE,10(8).
MLA	Zhang, Guo-Jin,et al."Inaccessible Biodiversity on Limestone Cliffs: Aster tianmenshanensis (Asteraceae), a New Critically Endangered Species from China".PLOS ONE 10.8(2015).