[Campbell Biology P.901] A plant is experiencing water stress, leading to wilting. Based on ... | Practice Question

A plant is experiencing water stress, leading to wilting. Based on the information provided, how does abscisic acid ABA primarily help the plant respond to this condition?

  • A: By promoting root elongation to reach deeper water sources.
  • B: By accumulating in leaves and closing stomata to reduce water loss.
  • C: By stimulating the production of new leaves to increase photosynthetic area.
  • D: By initiating programmed cell death in stressed cells.

Explanation

The 'Drought Tolerance' section explicitly states: 'When a plant begins to wilt, ABA accumulates in the leaves and causes stomata to close rapidly, reducing transpiration and preventing further water loss.'