Responses of leaf stomatal and mesophyll conductance to abiotic stress factors
Sheng-lan LI, Tingting Tan, Yuan-fang FAN, Muhammad Ali Raza, Zhong-lin WANG, Beibei Wang, Jia-wei ZHANG, Xianming Tan, Ping Chen, Iram Shafiq, Wenyu Yang, Feng Yang
Abstract
Plant photosynthesis assimilates CO2 from the atmosphere, and CO2 diffusion efficiency is mainly constrained by stomatal and mesophyll resistance. The stomatal and mesophyll conductance of plants are sensitive to abiotic stress factors, which affect CO2 concentrations at carboxylation sites to control photosynthetic rates. Early studies conducted relevant reviews on the responses of stomatal conductance to the environment and the limitation of mesophyll conductance by internal structure and biochemical factors. However, reviews on the abiotic stress factors systematically regulating plant CO2 diffusion are rare. Therefore, in this review, the rapid and long-term responses of stomatal and mesophyll conductance to abiotic stress factors (such as light intensity, drought, CO2 concentration and temperature) and their physiological mechanisms are summarized. Finally, future research trends are also investigated.