基于FvCB模型的叶片光合生理对环境因子的响应研究进展

为提高叶片光合速率并更好地理解叶片光合生理对环境因子变化的响应机制,FvCB模型(C_3植物光合生化模型)常用于分析不同环境条件下CO_2响应曲线并预测叶片活体内光合系统的内在变化状况。系统介绍了FvCB模型的建立、发展过程和拟合方法等基本理论,综述了该模型在叶片光合生理对光、CO_2、水、温度和N营养等环境因子变化的响应机制中的应用研究。为进一步完善FvCB模型并更好地理解叶片活体内光合系统对环境因子变化的响应机制,未来拟加强以下研究:1)羧化速率与光合电子传递速率之间的联系;2)叶肉导度的具体组分及其对FvCB模型参数估计的影响;3)叶片气孔导度和叶肉导度对环境因子变化的调控机制。

Advances in photo-physiological responses of leaves to environmental factors based on the FvCB model

Biochemical models of leaf photosynthesis are invaluable tools for exploring the photo-physiological responses to environmental factors and identify potential targets to improve the efficiency of CO₂ fixation. The FvCB model can be used to fit CO₂ response curves developed under different environmental conditions and predict underlying photosynthetic biochemistry. However, to do this successfully it is important to improve chloroplast electron transport modeling, and gain a better understanding of internal CO₂ diffusion limitations and elucidate the mechanisms of stomatal (g_s) and mesophyll (g_m) conductance responses to environmental factors. The FvCB model and its application in determining the photo-physiological responses to environmental factors, such as light, CO₂, water, temperature, and N nutrition have been reviewed in this paper. To improve the veracity of the parameter estimations and reveal the mechanism of photo-physiological responses to environmental factors, the following studies should be emphasized in the future: 1) the relationship between the carboxylation rate of Rubisco and chloroplast electron transport rate; 2) the CO₂ diffusion limitations in mesophyll cells and its effect on parameter estimations; and 3) the regulation of g_s and g_m responses to different environmental conditions.