Question

A farmer notices that his otherwise healthy wheat crop shows poor grain filling with shrivelled, lightweight grains after a spell of unusually high temperature late in the season. Which growth stage of wheat is most sensitive to heat stress in terms of grain filling and final yield?

Q: Answer-A farmer notices that his otherwise healthy wheat crop shows poor grain filling with shrivelled, lig...

High temperatures during the grain filling stage, roughly from the milk to dough stages, shorten the duration available for starch accumulation in the grain, leading to shrivelled, lightweight grains and a reduction in final yield, making this the most heat-sensitive stage for wheat.