Abscisic acid (ABA) is an antitranspirant. It | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) Abscisic acid $(ABA)$ acts as a stress hormone that promotes the closure of stomata during water stress conditions.It functions by inhibiting the

Vedclass · Accepted Answer

Preventing $K^+$ ion uptake,thus decreasing the osmotic concentration of the guard cells and keeping them flaccid

Vedclass · Answer

(B) Abscisic acid $(ABA)$ acts as a stress hormone that promotes the closure of stomata during water stress conditions.It functions by inhibiting the active uptake of $K^+$ ions into the guard cells.As the concentration of $K^+$ ions decreases,the osmotic potential of the guard cells increases (solute concentration decreases),leading to the efflux of water from the guard cells into the surrounding subsidiary cells.This loss of water causes the guard cells to become flaccid,resulting in the closure of the stomatal pore,thereby reducing transpiration.

Abscisic acid $(ABA)$ is an antitranspirant. It prevents transpiration by:

Similar Questions

The stress hormone that helps plants to respond to drought is

One of the most commonly detected inhibitors of germination is

Which one of the following growth regulators is known as 'stress hormone'?

Bud dormancy is induced by

The abscisic acid acts as an antitranspirant in plants by the following processes $EXCEPT$ . . . . . . .

Vedclass Test Series

Exam Paper Generator

Online Exam Module