Rhamnella intermedia (Rhamnaceae), a new evergreen species from southwest Guangxi | |
Lu, Zhiqiang2; Sun, Yongshuai2 | |
刊名 | PHYTOKEYS |
2020 | |
期号 | 159页码:115-126 |
关键词 | HYBRIDIZATION |
ISSN号 | 1314-2011 |
DOI | 10.3897/phytokeys.159.53177 |
英文摘要 | Rhamnella intermedia, a new evergreen species from southwest Guangxi, is described and illustrated in this study. This species is similar to R. braelympa by the size and ratio of length to width of dried fruit and seeds, by which it differs from R. rubrinervis and R. tonkinensis. However, it differs from R. brachycarpa by rarely mucronate seed apices, larger ratio of length to width of leaves, leaf apices acuminate to long acuminate, shorter leaf petioles, and longer fruiting pedicels. Principal component analysis based on phenotypic traits further recognised three separated groups. Rhamnella ruhrinervis and R. tonkinensis were clustered into one group; the other two groups represented R. brachycarpa and two Guangxi populations, respectively. Furthermore, phylogenetic analysis of nuclear ITS sequence variations highly supported that the two Guangxi populations represented an independent evolutionary lineage and were closest to R. rubrinervis. Four fixed nucleotide sites were found and were different from R. rubrinervis. However, besides the differentiated traits in seeds and fruit, densely pilose young branches also separated them from R. rubrinervis. In addition, during our field investigations, none of the three closely related species were found at locations where this new species was distributed. Therefore, this new species, based on the two Guangxi populations, is named R. intermedia. The key to four closely related species is also presented. |
学科主题 | Plant Sciences |
语种 | 英语 |
WOS记录号 | WOS:000567510600006 |
内容类型 | 期刊论文 |
源URL | [http://ir.xtbg.org.cn/handle/353005/11811] |
专题 | 西双版纳热带植物园_植物进化生态研究组 |
作者单位 | 1.Chinese Acad Sci, Ctr Plant Ecol, Core Bot Gardens, Mengla 666303, Yunnan, Peoples R China 2.Chinese Acad Sci, CAS Key Lab Trop Forest Ecol, Xishuangbanna Trop Bot Garden, Mengla 666303, Yunnan, Peoples R China |
推荐引用方式 GB/T 7714 | Lu, Zhiqiang,Sun, Yongshuai. Rhamnella intermedia (Rhamnaceae), a new evergreen species from southwest Guangxi[J]. PHYTOKEYS,2020(159):115-126. |
APA | Lu, Zhiqiang,&Sun, Yongshuai.(2020).Rhamnella intermedia (Rhamnaceae), a new evergreen species from southwest Guangxi.PHYTOKEYS(159),115-126. |
MLA | Lu, Zhiqiang,et al."Rhamnella intermedia (Rhamnaceae), a new evergreen species from southwest Guangxi".PHYTOKEYS .159(2020):115-126. |
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