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题名: Leaf anatomical structures of Paphiopedilum and Cypripedium and their adaptive significance
作者: Guan, Zhi-Jie1, 2; null(张石宝)3; Guan, Kai-Yun1; Li, Shu-Yun1; Hu, Hong1
刊名: JOURNAL OF PLANT RESEARCH
关键词: Cypripedium ; Leaf anatomical structure ; Leaf trait ; Paphiopedilum ; Stomata
英文摘要: Paphiopedilum and Cypripedium are closely related in phylogeny, but have contrasting leaf traits and habitats. To understand the divergence in leaf traits of Paphiopedilum and Cypripedium and their adaptive significance, we analyzed the leaf anatomical structures, leaf dry mass per area (LMA), leaf lifespan (LL), leaf nitrogen concentration (N(mass)), leaf phosphorus concentration (P(mass)), mass-based light-saturated photosynthetic rate (A(mass)), water use efficiency (WUE), photosynthetic nitrogen use efficiency (PNUE) and leaf construction cost (CC) for six species. Compared with Cypripedium, Paphiopedilum was characterized by drought tolerance derived from its leaf anatomical structures, including fleshy leaves, thick surface cuticles, huge adaxial epidermis cells, lower total stoma area, and sunken stomata. The special leaf structures of Paphiopedilum were accompanied by longer LL; higher LMA, WUE, and CC; and lower N(mass), P(mass), A(mass), and PNUE compared with Cypripedium. Leaf traits in Paphiopedilum helped it adapt to arid and nutrient-poor karst habitats. However, the leaf traits of Cypripedium reflect adaptations to an environment characterized by rich soil, abundant soil water, and significant seasonal fluctuations in temperature and precipitation. The present results contribute to our understanding of the divergent adaptation of leaf traits in slipper orchids, which is beneficial for the conservation of endangered orchids.
出版日期: 2011-03-01
卷号: 124, 期号:2, 页码:289-298
语种: 英语
收录类别: SCI
学科分类: Plant Sciences
ISSN号: 0918-9440
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/5241
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
2.Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China
3.Chinese Acad Sci, Xishuangbanna Trop Bot Garden, Kunming 650223, Peoples R China

Recommended Citation:
Guan, ZJ; Zhang, SB; Guan, KY; Li, SY; Hu, H.Leaf anatomical structures of Paphiopedilum and Cypripedium and their adaptive significance,JOURNAL OF PLANT RESEARCH,2011,124(2):289-298
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