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题名: Phylogeny and Evolution of Bracts and Bracteoles in Tacca (Dioscoreaceae)
作者: Zhang, Ling1; Li, Hong-Tao2, 3; null(高连明)2, 3; Yang, Jun-Bo2, 3; null(李德铢)2, 3; Cannon, Charles H.1, 4; Chen, Jin1; Li, Qing-Jun1
刊名: JOURNAL OF INTEGRATIVE PLANT BIOLOGY
关键词: atpA ; bracteoles ; bracts ; ITS ; molecular phylogeny ; rbcL ; Tacca ; trnH-psbA ; trnL-F
英文摘要: Most species in the genus Tacca (Dioscoreaceae) feature green to black purple, conspicuous inflorescence involucral bracts with variable shapes, motile filiform appendages (bracteoles), and diverse types of inflorescence morphology. To infer the evolution of these inflorescence traits, we reconstructed the molecular phylogeny of the genus, using DNA sequences from one nuclear, one mitochondrial, and three plastid loci (Internal Transcribed Spacer (ITS), atpA, rbcL, trnL-F, and trnH-psbA). Involucres and bracteoles characters were mapped onto the phylogeny to analyze the sequence of inflorescence trait evolution. In all analyses, species with showy involucres and bracteoles formed the most derived clade, while ancestral Tacca had small and plain involucres and short bracteoles, namely less conspicuous inflorescence structures. Two of the species with the most elaborate inflorescence morphologies (T. chantrieri in southeast China and T. integrifolia in Tibet), are predominantly self-pollinated, indicating that these conspicuous floral displays have other functions rather than pollinator attraction. We hypothesize that the motile bracteoles and involucres may facilitate selfing; display photosynthesis in the dim understory, and protect flowers from herbivory.
出版日期: 2011-11-01
卷号: 53, 期号:11, 页码:901-911
DOI标识: 10.1111/j.1744-7909.2011.01076.x
语种: 英语
收录类别: SCI
学科分类: Biochemistry & Molecular Biology; Plant Sciences
ISSN号: 1672-9072
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/3814
Appears in Collections:中国科学院东亚植物多样性与生物地理学重点实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Key Lab Trop Forest Ecol, Xishuangbanna Trop Bot Garden, Mengla 666303, Yunnan, Peoples R China
2.Chinese Acad Sci, Key Lab Biodivers & Biogeog, Kunming 650204, Peoples R China
3.Chinese Acad Sci, Germplasm Bank Wild Species SW China, Kunming Inst Bot, Kunming 650204, Peoples R China
4.Texas Tech Univ, Dept Biol, Lubbock, TX 79390 USA

Recommended Citation:
Zhang, Ling; Li, Hong-Tao; Gao, Lian-Ming; Yang, Jun-Bo; Li, De-Zhu; Cannon, Charles H.; Chen, Jin; Li, Qing-Jun.Phylogeny and Evolution of Bracts and Bracteoles in Tacca (Dioscoreaceae),JOURNAL OF INTEGRATIVE PLANT BIOLOGY,2011,53(11):901-911
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