CO2 mesophyll conductance regulated by light: a review

Main ConclusionLight quality and intensity regulate plant mesophyll conductance, which has played an essential role in photosynthesis by controlling leaf structural and biochemical properties.Mesophyll conductance (g(m)), a crucial physiological factor influencing the photosynthetic rate of leaves, is used to describe the resistance of CO2 from the sub-stomatal cavity into the chloroplast up to the carboxylation site. Leaf structural and biochemical components, as well as external environmental factors such as light, temperature, and water, all impact g(m). As an essential factor of plant photosynthesis, light affects plant growth and development and plays a vital role in regulating g(m) as well as determining photosynthesis and yield. This review aimed to summarize the mechanisms of g(m) response to light. Both structural and biochemical perspectives were combined to reveal the effects of light quality and intensity on the g(m), providing a guide for selecting the optimal conditions for intensifying photosynthesis in plants.

Automated summary

Light quality and intensity regulate plant mesophyll conductance, which is crucial for photosynthetic rate. Both structural and biochemical factors, as well as external environmental factors, influence mesophyll conductance. Understanding the mechanisms of the response of mesophyll conductance to light can guide the optimization of conditions for enhancing photosynthesis in plants.