Evolutionary radiations of cushion plants on the Qinghai-Tibet Plateau: Insights from molecular phylogenetic analysis of two subgenera of Arenaria and Thylacospermum (Caryophyllaceae)
Xu, Bo1; Luo, Dong2; Li, Zhi-Min3; Sun, Hang2
Corresponding AuthorSun, Hang(sunhang@mail.kib.ac.cn)
2019-12-10
Source PublicationTAXON
ISSN0040-0262
Pages18
AbstractCushion 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.
Keywordcushion Arenaria evolutionary radiations molecular phylogeny Qinghai-Tibet Plateau Quaternary glaciation Thylacospermum
DOI10.1002/tax.12127
Indexed BySCI ; SCI
Language英语
WOS Research AreaPlant Sciences ; Evolutionary Biology
WOS SubjectPlant Sciences ; Evolutionary Biology
WOS IDWOS:000501848100001
Citation statistics
Document Type期刊论文
Identifierhttp://ir.kib.ac.cn/handle/151853/70602
Collection中国科学院东亚植物多样性与生物地理学重点实验室
Corresponding AuthorSun, Hang
Affiliation1.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
Recommended Citation
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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