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题名: Ecophysiological significance of leaf traits in Cypripedium and Paphiopedilum
作者: Chang, Wei1, 3; null(张石宝)2; Li, Shu-Yun1; Hu, Hong1
刊名: PHYSIOLOGIA PLANTARUM
关键词: NITROGEN-USE EFFICIENCY ; STOMATAL CONDUCTANCE ; CARBON GAIN ; LIFE-SPAN ; MESOPHYLL CONDUCTANCE ; CONSTRUCTION COSTS ; GAS-EXCHANGE ; PHOTOSYNTHESIS ; PLANTS ; ORCHIDACEAE
英文摘要: There is a close phylogenetic relationship between Paphiopedilum and Cypripedium, but these two genera diverge considerably in terms of their leaf traits. To understand the evolution and the ecophysiological significance of leaf traits, we investigated the leaf traits of three Paphiopedilum species and three Cypripedium species in southwestern China. Cypripedium tibeticum and C. flavum showed a significantly higher light-saturated photosynthetic rate (P(max)), stomatal conductance (g(s)), photosynthetic nitrogen utilization efficiency (PNUE) and specific leaf area (SLA), but lower ratio of leaf carbon to nitrogen content (C/N) and leaf construction cost (CC) than Paphiopedilum. These leaf traits of Cypripedium suggest its high resource use efficiency and high growth rate reflecting adaptation to a short growing period and abundant soil nutrients and water in alpine habitats. Conversely, the low P(max), g(s), PNUE, SLA and the ratio of chlorophyll a to chlorophyll b (Chl a/b), but high leaf nitrogen investment in light-harvesting component (P(L)), CC and C/N in Paphiopedilum indicate its adaptation to a low light, nutrient-poor and limited soil water habitats in karst areas. As a sympatric species of Paphiopedilum, although C. lentiginosum retained the phylogenetic leaf traits of Cypripedium, such as high mass-based light-saturated photosynthetic rate (P(max-M)), g(s) and PNUE, it had some similar leaf traits to those of Paphiopedilum, such as low mesophyll conductance (g(m)) and Chl a/b, and high P(L), which reflected an adaptation to the same habitat. Our results show that the evolution of the leaf traits of Paphiopedilum and Cypripedium are shaped by both phylogeny and environment.
出版日期: 2011
卷号: 141, 期号:1, 页码:30-39
DOI标识: 10.1111/j.1399-3054.2010.01418.x
语种: 英语
收录类别: SCI
学科分类: Plant Sciences
ISSN号: 0031-9317
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/5257
Appears in Collections:资源植物与生物技术所级重点实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Key Lab Econ Plants & Biotechnol, Kunming Inst Bot, Kunming 650204, Peoples R China
2.Chinese Acad Sci, Xishuangbanna Trop Bot Garden, Kunming 650223, Peoples R China
3.Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China

Recommended Citation:
Chang, W; Zhang, SB; Li, SY; Hu, H.Ecophysiological significance of leaf traits in Cypripedium and Paphiopedilum,PHYSIOLOGIA PLANTARUM,2011,141(1):30-39
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