Plant Growth and Development Question 58

58. Abscisic acid causes

[1991]

(a) stomatal closure

(b) stem elongation

(c) leaf expansion

(d) root elongation

Show Answer

Answer : a

Hints & Solutions

(a) Abscisic acid is a stress hormone. During desication abscisic acid is synthesized which reduces transpiration by closure of stomata. It conserves water.