What is the expected effect on salt accumulation in the plant vacuole of a mutation in the plant vacuolar ATPase that decreases the H⁺ concentration in the vacuole?
A)increased Na⁺ accumulation
B)decreased Na⁺ accumulation
C)no effect
D)complete seed germination failure

Question

Quizplus · Accepted Answer

The vacuolar ATPase pumps H⁺ ions into the vacuole, creating a proton gradient that drives the secondary transport of other ions, such as Na⁺, into the vacuole for storage or detoxification. A decrease in H⁺ concentration in the vacuole due to a mutation in the ATPase would weaken this gradient, thereby reducing the energy available for Na⁺ transport into the vacuole, leading to decreased Na⁺ accumulation.

What Is the Expected Effect on Salt Accumulation in the Plant