柑橘光合作用的过剩能量耗散机制及其生理意义*

 柑橘属于C₃植物,易发生光合作用的光抑制。在光抑制条件下,柑橘可通过光呼吸耗散、光化学耗散和非光化学耗散以及降低光合色素含量等方式处理过剩能量。非光化学耗散又分为高能态猝灭、状态转换和D₁蛋白循环。这些机制相互关联, 在不同的条件下相继启动,协同作用,是柑橘在长期进化中形成的防御光破坏的有效途径,具有十分重要的生理意义。

Dissipation Mechanisms of the Overmuch Energy and Their Physiological Significances of Photosynthesis in Citrus reticulata Blanco

Citrus reticulata Blanco belongs to C3 plant,it's photoinhibition in photosyn-thesis occurs easily.Under the condition of photoinhibition,Citrus deals with excessive energy by photorespiration dissipation,photochemistry dissipation and non-photochemistry dissipation and reduction of photosynthetic pigment content.The non-photochemistry dissipation can be classified into high-energy state quenching,state transition and D1 protein cycle.These mechanisms associate with each other,start up in succession and function together under different conditions,which are the effective ways defending Citrus reticulata Blanco from light destruction,and form during along period of evolution,with very important physiological significances.