Bulletin of Botanical Research ›› 2007, Vol. 27 ›› Issue (4): 434-438.doi: 10.7525/j.issn.1673-5102.2007.04.012
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WEI Xiao;WANG Man-Liang;JIANG Yun-Sheng;TANG Hui;CHEN Zhong-You;CAO Hong-Lin*
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Abstract: The photosynthetic characteristics of leaves in Camellia euphlebia were studied with LI-6400 (Li-Cor Inc., USA) portable photosynthesis system. The results showed that the diurnal changes of photosynthetic rate (Pn) in C. euphlebia exhibited a mono-peak style, and the maximum value of Pn appeared at 11:00 am in summer. The maximum photosynthetic rate(Pmax), light saturation point(LSP), light compensation point(LCP)for the leaves of C. euphlebia were 3.81 μmol·m-2·s-1, 459.9 μmol·m-2·s-1 and 6.9 μmol·m-2·s-1, respectively. The light saturation and compensation point were very low, which indicated that C. euphlebia was a shade plant. Under the condition of optimum light intensity and temperature, the net photosynthetic rate of C. euphlebia increased linearly when the concentration of CO2 enhanced from 50 μmol·mol-1 to 800 μmol·mol-1. Elevation of CO2 concentration increased the Pn and the efficiency of ligh utilizing in C. euphlebia. The CO2 saturation (CSP), compensation point(Г*), the maximum carboxylation rate (Vcmax)and maximum rate of electron transport(Jmax) were about 1 200 μmol•mol-1, 70.1 μmol·mol-1, 17.5 μmol·m-2·s-1, respectively.
Key words: Camellia euphlebia, net photosynthetic rate, light saturation point, light compensation point
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WEI Xiao;WANG Man-Liang;JIANG Yun-Sheng;TANG Hui;CHEN Zhong-You;CAO Hong-Lin*. The Photosynthetic Characteristics of Camellia euphlebia[J]. Bulletin of Botanical Research, 2007, 27(4): 434-438.
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URL: https://bbr.nefu.edu.cn/EN/10.7525/j.issn.1673-5102.2007.04.012
https://bbr.nefu.edu.cn/EN/Y2007/V27/I4/434