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题名: Reassessment of the species Stigeoclonium polyrhizum (Chaetophoraceae, Chaetophorales) based on morphological and molecular data
作者: Liu, Benwen1, 2; Liu, Xudong1, 2; Wang, Qinghua1, 2; Hu, Zhengyu3; Liu, Guoxiang1
关键词: Chaetophora draparnaldioides ; Morphology ; Pyrenoid ; Polyphyly ; Stigeoclonium longipilum
刊名: PHYTOTAXA
发表日期: 2018-01-05
DOI: 10.11646/phytotaxa.333.1.6
卷: 333, 期:1, 页:86-98
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
类目[WOS]: Plant Sciences
研究领域[WOS]: Plant Sciences
英文摘要: Four specimens of Stigeoclonium spp., sampled in China between 2015 and 2016, were identified as the species Stigeoclonium polyrhizum (Chaetophoraceae, Chaetophorales) due to their unique morphology. A large part of the main filament and branches was tightly enclosed by numerous rhizoidal branches, which extended downward to the base of the plant to form an expanded holdfast. S. polyrhizum has previously been regarded as a synonym of S. longipilum or other related species by most phycologists. Therefore, a reassessment of S. polyrhizum based on morphological and molecular data was conducted. Rhizoidal branch development of S. polyrhizum was also described, showing the abundant rhizoidal branches present from the juvenile stage to the mature stage under controlled culture conditions. Phylogenetic evidence, using nuclear-encoded SSU rDNA data, clearly revealed that the Chaetophoraceae diverged into two well-supported sister clades: the Chaetophoraclade and the Fritschiella-clade. S. polyrhizum was included in the Fritschiella-clade instead of the Chaetophora-clade where Chaetophora draparnaldioides (S. longipilum) was found. The morphological and molecular data unambiguously show that S. polyrhizum is a valid species rather than a synonym of S. longipilum or other related species. Thylakoid bands appressed to the periphery of the pyrenoid matrix of S. polyrhizum was also described.
关键词[WOS]: PHYLOGENETIC ANALYSIS ; CHLOROPHYCEAE ; DRAPARNALDIA
语种: 英语
项目资助者: National Natural Science Foundation of China(31670202) ; China Agriculture Research System(CARS-50)
WOS记录号: WOS:000419733100006
ISSN号: 1179-3155
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内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/50619
Appears in Collections:藻类生物学及应用研究中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Hydrobiol, Key Lab Algal Biol, Wuhan 430072, Hubei, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100039, Peoples R China
3.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Hubei, Peoples R China
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