Mutant plants that wilt easily under strong sunlight and high temperatures have been isolated.The stomata in these plants are functional,but do not respond to ABA.What protein may be missing from these plants?

Question

Quizplus · Accepted Answer

ABA is a hormone that regulates stomata closure under stressful conditions such as high temperature and strong sunlight. The fact that the stomata in these mutant plants are functional but do not respond to ABA suggests that there may be a defect in the ABA receptor. The other options, aquaporin, H⁺-ATPase proton pump, and P proteins, are not directly involved in ABA signaling and therefore are unlikely to be missing from these mutant plants.

Mutant Plants That Wilt Easily Under Strong Sunlight and High