Mechanism of photosynthetic physiology and molecular biology of crop yield as affected by elevated atmospheric CO₂ concentration and temperature-A review

Under climate change, the elevated temperature likely interferes the "fertilizer effect" of elevated atmospheric CO₂ concentration on crop productivity.The complex responses of photosynthetic and molecular processes to climate change may theoretically lead to this uncertainty.In this paper, we analyzed the response of key photosynthetic indicators and yield, such as photosynthetic rate, stomatal conductance, Rubisco activity in a wide range of crops; summarized the influences of the elevated CO₂ and temperature on the relevant gene expression of crops.We proposed that future research should focus on crop transcriptomic, metabolic and proteomic response to climate change in various agro-ecological regions.We prospected that crucial photosynthetic gene expression in response to specific climate change in different regions would be a research orientation to improve crop adaptability and management to climate change in the future.