光合作用原初反应中的能量分配机制研究

Primary reaction of photosynthesis involves some processes such as light energy absorption, energy transfer and energy distribution. The distribution quantities will directly influence the processes of formation of reducing power and carbon assimilation process. Therefore, the mechanism of light energy distribution of primary reaction is an important part of photosynthesis research. At present, people investigated on it through one photochemistry pathway, or simplified to consider light energy to distribute to photochemistry, heat dissipation and chlorophyll fluorescence, so we can not reveal the essence of light energy distribution in primary reaction of photosynthesis. In view of photosynthetic pigments playing a very key role in light energy absorption and transfer in photosynthesis, we will plan to utilize single photosynthetic pigment molecule as research object, comprehensively utilize transition theory of energy level of molecule physics, quantum mechanics, detail balance principle and differential equation to investigate the response function of molecule numbers of photosynthetic pigment molecules in the excited state, light energy distribute rule to photochemistry, heat dissipation and chlorophyll fluorescence when it absorbs light quantum, as well as the relationship between dissipation energy with physical parameters of light-harvesting pigments, to elucidate light energy distribution mechanism in primary reaction because of a purely physical process of primary reaction of photosynthesis. It will be important meaning to recognize essence of primary reaction, light energy use coefficient of crops and photoadaptation mechanism when these questions are understood. Also it will provide a new idea and theoretical basis to increase crop yield.

原初反应涉及光合色素分子的光能吸收、传递和能量分配等，其能量分配的多少直接影响着后续同化力的形成和碳同化进程。因此，原初反应的能量分配及其分配机制是光合作用中的重要研究内容。目前，人们对它的研究仅考虑光化学反应这条途径，或简单地将能量恒定分配到光化学反应、热耗散和叶绿素荧光这三条途径，因而不能揭示原初反应的能量分配本质。本项目针对光合色素分子在原初反应中的关键作用以及原初反应是一纯物理过程，拟以单个光合色素分子为研究对象，利用分子物理学中能级跃迁理论、量子力学和微分方程等，研究光合色素分子吸收光能后跃迁到激发态的分子数对光的响应函数，光能分配到光化学反应、热耗散和叶绿素荧光这三条途径的变化规律以及它们与光合色素分子物理参数之间的关系，阐明原初反应中的能量分配机制。这对认识植物光合作用原初反应的本质、光能利用效率和光适应机理等具有重要的科学意义，也有望为提高作物产量提供新的思路和理论依据。

原初反应涉及光合色素分子的光能吸收、传递和能量分配等，其能量分配的多少直接影响着后续同化力的形成和碳同化进程。因此，原初反应的能量分配及其分配机制是光合作用中的重要研究内容。目前，人们对它的研究仅考虑光化学反应这条途径，或简单地将能量恒定分配到光化学反应、热耗散和叶绿素荧光这三条途径，因而不能揭示原初反应的能量分配本质。本项目针对光合色素分子在原初反应中的关键作用以及原初反应是一纯物理过程，拟以单个光合色素分子为研究对象，利用分子物理学中能级跃迁理论、量子力学和微分方程等，研究光合色素分子吸收光能后跃迁到激发态的分子数对光的响应函数，光能分配到光化学反应、热耗散和叶绿素荧光这三条途径的变化规律以及它们与光合色素分子物理参数之间的关系，阐明原初反应中的能量分配机制。这对认识植物光合作用原初反应的本质、光能利用效率和光适应机理等具有重要的科学意义，也有望为提高作物产量提供新的思路和理论依据。