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基于光合作用对光响应新模型,以番茄(Lycopersicon esculentum)为例,构建了叶片尺度的光能利用效率(LUE)和水分利用效率(WUE)对光响应模型,并在此基础上比较了不同CO_2浓度(350、450、550和650μmol·mol-1)下番茄叶片的LUE和WUE等生理特性。结果表明:(1)光响应新模型可很好地拟合4种CO_2浓度下的番茄幼苗叶片的光合特性,拟合值与实测值高度吻合;(2)基于光响应新模型推导的叶片LUE模型(LUE-I模型)和WUE模型(WUE-I模型)也可以很好地拟合4种CO_2浓度下的番茄幼苗叶片的LUE和WUE与光强的关系,且拟合值同样与实测值高度吻合;(3)LUE-I模型和WUE-I模型还可分别给出相应的最大光能利用效率(LUE_(max))和最大水分利用效率(WUE_(max)),及其对应的饱和光强。综合本试验结果认为,新构建的LUE-I模型和WUE-I模型对研究叶片尺度的LUE和WUE对光强的响应是可行的。
Based on a new model of photosynthesis response to photosynthesis, Lycopersicon esculentum was used as an example to construct models of LUE and WUE responses to leaf photosynthesis, and on the basis of which differences were compared CO 2 concentration (350,450,550 and 650μmol · mol -1) tomato leaves LUE and WUE and other physiological characteristics. The results showed that: (1) The new model of photosynthesis could well fit the photosynthetic characteristics of tomato seedling leaves under four CO 2 concentrations, and fitted well with the measured values; (2) Based on the new model of light response, the leaf LUE The model (LUE-I model) and the WUE model (WUE-I model) can also well fit the relationship between LUE and WUE and light intensity of tomato seedling leaves under four CO 2 concentrations. The fitted values are also similar to the measured values (3) LUE-I model and WUE-I model can also give the corresponding maximum energy use efficiency (LUE max) and maximum water use efficiency (WUE max), and their corresponding saturation Light intensity. Based on the results of this experiment, it is concluded that the newly constructed LUE-I model and WUE-I model are feasible to study the response of leaf-scale LUE and WUE to light intensity.