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Pak. J. Bot., 44(1): 327-331, 2012. |
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Updated: 07-02-12 |
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PHOTOSYNTHETIC CHARACTERISTIC OF AN ENDANGERED SPECIES CAMELLIA NITIDISSIMA AND ITS CONSERVATION IMPLICATIONS
XIAO-XUE QI1, YUN-SHENG JIANG1, XIAO WEI1*, HUI TANG1, ZHONG-CHEN XIONG 1, WAN-HUI YE2, AND ZHANG-MING WANG2
Abstract: Camellia nitidissima is a shrub and a famous ornamental species with golden-yellow flowers. The responses of net photosynthetic rate (Pn) to the incident intensity (PFD) and the diurnal course of variation in major physiological and environmental variables of young and mature C. nitidissima were studied with LI-6400 (Li-Cor Inc., USA) portable photosynthesis system. The results showed that the leaves of C. nitidissima had the highest photosynthetic ability in autumn, the middle level of photosynthesis in summer and spring, and a relatively lower level of photosynthesis in winter. Mature plants of C. nitidissima had both relatively high the maximum net photosynthesis rate (Pmax) and light saturation point (LSP), indicating a good adaptability to both strong and weak lights; young plants of C. nitidissima had both relatively low Pmax and LSP, indicating a good adaptability to weak light, but a depression under strong light. C. nitidissima is a shade loving plant and should be planted in shade habitat. Some suggestions for the management of the species are proposed.
1Guangxi Institute of Botany, Guangxi Zhuangzu Autonomous Region and Academia Sinica, Guilin 541006, P.R. China*, 2South China Botanical Garden, the Chinese Academy of Sciences, Guangzhou 510650, P.R. China *Corresponding author: Tel: +86-773-3550194, E-mail address: weixiao@scbg.ac.cn; weixiao@gxib.cn |
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