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- Title
不同CO<sub>2</sub> 浓度下番茄幼苗叶片的光能利用效率.
- Authors
叶子飘; 康华靖; 杨小龙
- Abstract
Light-use efficiency (LUE) is an important parameter to assess light energy absorption of leaf. Especially, it is a key factor to affect production and quality of ecosystem. A model of LUE was developed based on a mechanistic model of light-response of photosynthesis. The maximum LUE (LUEmax) and corresponding saturation irradiance (IL-sat) were deduced according to the LUE model. At CO2 concentrations of 350, 450, 550 and 650 μmol #183; mol-1, the light-response curves of LUE of tomato seedling leaves were simulated. The results showed that the model of LUE described well the response curves of light use efficiency of tomato seedling leaves at four CO2 concentrations. LUE of tomato seedling leaves reached the maximum value at photosynthetically active radiation between 70-90 μmol #183; m-2 #183; s-1. There were no difference of LUEmax and IL-sat at 550 and 650 μmol #183; mol-1. Regarding this phenomenon, it was hypothesized that the photosynthetic functions of tomato seedling leaves had acclimated to the low irradiance in greenhouse so that the intrinsic characteristic of light-harvesting pigments such as the effective light absorption cross-section of light-harvesting pigments and ratio of pigment molecules in the excited state to ground state had hardly changed at high CO2 concentrations.
- Publication
Yingyong Shengtai Xuebao, 2016, Vol 27, Issue 8, p2543
- ISSN
1001-9332
- Publication type
Article
- DOI
10.13287/j.1001-9332.201608.035