Evolutionary radiations of cushion plants on the Qinghai-Tibet Plateau: Insights from molecular phylogenetic analysis of two subgenera of Arenaria and Thylacospermum (Caryophyllaceae)

doi:10.1002/tax.12127

	Evolutionary radiations of cushion plants on the Qinghai-Tibet Plateau: Insights from molecular phylogenetic analysis of two subgenera of Arenaria and Thylacospermum (Caryophyllaceae)
	Xu, Bo 1; Luo, Dong2 ; Li, Zhi-Min 3; Sun, Hang2
通讯作者	Sun, Hang(sunhang@mail.kib.ac.cn)
	2019-12-10
发表期刊	TAXON
ISSN	0040-0262
页码	18
摘要	Cushion plants exhibiting adaptive convergence in cold and dry environments are keystone and foundation species in the alpine/subnival habitat on the Qinghai-Tibet Plateau (QTP). To date, little attention has been paid to the molecular phylogeny, origin, and biogeography of cushion plants on the QTP. We investigated the molecular phylogeny of classic cushion Arenaria subg. Dolophragma, A. subg. Eremogoneastrum, and Thylacospermum on the QTP, within the framework of the Caryophyllaceae. A new Thylacospermum-Dolophragma clade was identified using combined plastid markers (rps16, matK, trnL-trnF, trnS-trnfM) and nuclear ribosomal DNA. Molecular divergence dating suggested that Thylacospermum and A. subg. Dolophragma originated in the middle to late Miocene (11.68 Ma). Combined with ancestral range reconstruction, there is an indication that all species of cushion Arenaria (A. subg. Dolophragma, A. subg. Eremogoneastrum) originated during/after the late Pliocene, and the QTP was their ancestral area. Furthermore, ecological niche modeling showed that the areas occupied by the three studied cushion plants during the last glacial maximum (LGM) was broader than that of their present distribution, implying a reduction in their range after the LGM. This evidence clearly illustrates that multistage uplift of the QTP and bordering mountains since the Miocene associated with climatic change (worldwide cooling, aridification in Central Asia, Quaternary glaciation) played a role in triggering and facilitating the speciation and/or evolutionary radiations of the species studied.
关键词	cushion Arenaria evolutionary radiations molecular phylogeny Qinghai-Tibet Plateau Quaternary glaciation Thylacospermum
DOI	10.1002/tax.12127
收录类别	SCI ; SCI
语种	英语
WOS记录号	WOS:000501848100001
引用统计	被引频次：10[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/70602
专题	中国科学院东亚植物多样性与生物地理学重点实验室
通讯作者	Sun, Hang
作者单位	1.Southwest Forestry Univ, Coll Forestry, Kunming 650224, Yunnan, Peoples R China 2.Chinese Acad Sci, Key Lab Plant Divers & Biogeog East Asia, Kunming Inst Bot, Kunming 650201, Yunnan, Peoples R China 3.Yunnan Normal Univ, Sch Life Sci, Kunming 650500, Yunnan, Peoples R China
推荐引用方式 GB/T 7714	Xu, Bo,Luo, Dong,Li, Zhi-Min,et al. Evolutionary radiations of cushion plants on the Qinghai-Tibet Plateau: Insights from molecular phylogenetic analysis of two subgenera of Arenaria and Thylacospermum (Caryophyllaceae)[J]. TAXON,2019:18.
APA	Xu, Bo,Luo, Dong,Li, Zhi-Min,&Sun, Hang.(2019).Evolutionary radiations of cushion plants on the Qinghai-Tibet Plateau: Insights from molecular phylogenetic analysis of two subgenera of Arenaria and Thylacospermum (Caryophyllaceae).TAXON,18.
MLA	Xu, Bo,et al."Evolutionary radiations of cushion plants on the Qinghai-Tibet Plateau: Insights from molecular phylogenetic analysis of two subgenera of Arenaria and Thylacospermum (Caryophyllaceae)".TAXON (2019):18.

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