Drought stress reduces starch in sorghum grains, impacting food security.
Drought stress during the flowering stage reduces starch accumulation in sorghum grains. High and low starch content sorghum hybrids showed differences in starch accumulation and enzyme activities under drought stress. Total starch, amylase, and amylopectin accumulation decreased, as did the activities of starch synthesis enzymes. The reduction in starch accumulation was more significant in the high starch content hybrid. Drought stress affects the activities of enzymes involved in starch synthesis, leading to lower starch levels in grains.