Effects on Chlorophyll Content and Photosynthetic Rate of Maize Leaves under Water Stress and Rewatering

The photosynthetic rate and chlorophyll content of the leaves decreased under water stress. The recovering ability of them were strong under light and moderate water stress, but weak under severe stress after rewatering and chlorophyll content still declined during primary period of rewatering. The fact showed the photosynthesis was restrained until elimination of water stress. Compared with droughtsensitive cultivar, the droughtresistant had the lower reduction extent and higher recovering ability.