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题名: Gas exchanges of three co-occurring species of Cypripedium in a scrubland in the Hengduan Mountains
作者: null(张石宝); null(胡虹); Xu, K; Li, ZR
刊名: PHOTOSYNTHETICA
关键词: alpine environment ; apparent quantum efficiency ; carboxylation efficiency ; CO2 concentration ; conservation ; leaf nitrogen content ; respiration rate ; stomatal conductance
英文摘要: Gas exchanges and related leaf traits of three co-occurring species of genus Cypripedium (C. yunnanense Franch., C. guttatum SW., and C. flavum P.F. Hunt et Summerch.) were investigated in a scrubland at 3 460 in a.s.l. in the Hengduan Mountains. The considered species had similar photosynthetic responses to photosynthetic photon flux density (PPFD) and air temperature. The photosynthetic capacity (P-max), carboxylation efficiency (CE), apparent quantum efficiency (AQE), PPFD-saturated rate of electron transport (J(max)), respiration rate (R-D), and leaf nitrogen content per unit area (LNC) of C. guttatum were higher than those of C. yunnanense and C. flavum. The highest P-max of C. guttatum was related to the highest LNC and the lowest ratio of intercellular CO2 concentration to atmospheric CO2 concentration (C-i/C-a). However, no significant differences in stomatal conductance (g(s)) and relative stomatal limitations (RSL) were observed among the three species. Hence biochemical limitation had a dominant role in P-max differences among the considered species.
出版日期: 2006
卷号: 44, 期号:2, 页码:241-247
语种: 英语
ISSN号: 0300-3604
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内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/3184
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, Kunming Inst Bot, Kunming 650204, Peoples R China

Recommended Citation:
Zhang, SB; Hu, H; Xu, K; Li, ZR.Gas exchanges of three co-occurring species of Cypripedium in a scrubland in the Hengduan Mountains,PHOTOSYNTHETICA,2006,44(2):241-247
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