Ecophysiological significance of leaf traits in Cypripedium and Paphiopedilum
Chang, Wei1,3; Zhang, Shi-Bao2; Li, Shu-Yun1; Hu, Hong1
2011
发表期刊PHYSIOLOGIA PLANTARUM
ISSN0031-9317
卷号141期号:1页码:30-39
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.
关键词Nitrogen-use Efficiency Stomatal Conductance Carbon Gain Life-span Mesophyll Conductance Construction Costs Gas-exchange Photosynthesis Plants Orchidaceae
资助信息NSFC[30870239, 30770225]; Knowledge Innovation Project[KSCX2-YW-Z-033]; Yunnan Social Development Science Program[2007C001Z]
收录类别SCI
语种英语
引用统计
文献类型期刊论文
条目标识符http://ir.kib.ac.cn/handle/151853/5257
专题资源植物与生物技术所级重点实验室
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
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Chang, Wei,Zhang, Shi-Bao,Li, Shu-Yun,et al. Ecophysiological significance of leaf traits in Cypripedium and Paphiopedilum[J]. PHYSIOLOGIA PLANTARUM,2011,141(1):30-39.
APA Chang, Wei,Zhang, Shi-Bao,Li, Shu-Yun,&Hu, Hong.(2011).Ecophysiological significance of leaf traits in Cypripedium and Paphiopedilum.PHYSIOLOGIA PLANTARUM,141(1),30-39.
MLA Chang, Wei,et al."Ecophysiological significance of leaf traits in Cypripedium and Paphiopedilum".PHYSIOLOGIA PLANTARUM 141.1(2011):30-39.
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