| Adaptive responses drive the success of polyploid yellowcresses (Rorippa, Brassicaceae) in the Hengduan Mountains, a temperate biodiversity hotspot | |
Han, Ting-Shen; Hu, Zheng-Yan; Du, Zhi-Qiang; Zheng, Quan-Jing; Liu, Jia; Mitchell-Olds, Thomas; Xing, Yao-Wu
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| 2022 | |
| Source Publication | PLANT DIVERSITY
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| Volume | 44Issue:5Pages:455-467 |
| Abstract | Polyploids contribute substantially to plant evolution and biodiversity; however, the mechanisms by which they succeed are still unclear. According to the polyploid adaptation hypothesis, successful poly-ploids spread by repeated adaptive responses to new environments. Here, we tested this hypothesis using two tetraploid yellowcresses (Rorippa), the endemic Rorippa elata and the widespread Rorippa palustris, in the temperate biodiversity hotspot of the Hengduan Mountains. Speciation modes were resolved by phylogenetic modeling using 12 low-copy nuclear loci. Phylogeographical patterns were then examined using haplotypes phased from four plastid and ITS markers, coupled with historical niche reconstruction by ecological niche modeling. We inferred the time of hybrid origins for both species as the mid-Pleistocene, with shared glacial refugia within the southern Hengduan Mountains. Phylogeo-graphic and ecological niche reconstruction indicated recurrent northward colonization by both species after speciation, possibly tracking denuded habitats created by glacial retreat during interglacial periods. Common garden experiment involving perennial R. elata conducted over two years revealed significant changes in fitness-related traits across source latitudes or altitudes, including latitudinal increases in survival rate and compactness of plant architecture, suggesting gradual adaptation during range expansion. These findings support the polyploid adaptation hypothesis and suggest that the spread of polyploids was aided by adaptive responses to environmental changes during the Pleistocene. Our results thus provide insight into the evolutionary success of polyploids in high-altitude environments. Copyright (c) 2022 Kunming Institute of Botany, Chinese Academy of Sciences. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co., Ltd. This is an open access article under the CC BY -NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). |
| Keyword | Adaptation Hengduan mountains Pleistocene Polyploidy Rorippa |
| Subject Area | Plant Sciences |
| DOI | 10.1016/j.pld.2022.02.002 |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:000889155400001 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | https://ir.xtbg.ac.cn/handle/353005/13324 |
| Collection | 2012年后新成立研究组 |
| Affiliation | 1.[Han, Ting-Shen 2.Hu, Zheng-Yan 3.Du, Zhi-Qiang 4.Zheng, Quan-Jing 5.Liu, Jia 6.Chinese Acad Sci, CAS Key Lab Trop Forest Ecol, Xishuangbanna Trop Bot Garden, Mengla 666303, Yunnan, Peoples R China 7.Chinese Acad Sci, Ctr Plant Ecol, Core Bot Gardens, Mengla 666303, Yunnan, Peoples R China 8.Duke Univ, Dept Biol, Box 90338, Durham, NC 27708 USA 9.[Hu, Zheng-Yan 10.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| Recommended Citation GB/T 7714 | Han, Ting-Shen,Hu, Zheng-Yan,Du, Zhi-Qiang,et al. Adaptive responses drive the success of polyploid yellowcresses (Rorippa, Brassicaceae) in the Hengduan Mountains, a temperate biodiversity hotspot[J]. PLANT DIVERSITY,2022,44(5):455-467. |
| APA | Han, Ting-Shen.,Hu, Zheng-Yan.,Du, Zhi-Qiang.,Zheng, Quan-Jing.,Liu, Jia.,...&Xing, Yao-Wu.(2022).Adaptive responses drive the success of polyploid yellowcresses (Rorippa, Brassicaceae) in the Hengduan Mountains, a temperate biodiversity hotspot.PLANT DIVERSITY,44(5),455-467. |
| MLA | Han, Ting-Shen,et al."Adaptive responses drive the success of polyploid yellowcresses (Rorippa, Brassicaceae) in the Hengduan Mountains, a temperate biodiversity hotspot".PLANT DIVERSITY 44.5(2022):455-467. |
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