Plant deficient in zinc, show reduced biosynthesis of growth hormone

A. Cytokinin

B. Auxin

C. Abscisic acid

D. Ethylene

Answer: Option B

Solution(By Examveda Team)

Plants deficient in zinc, show reduced biosynthesis of the growth hormone Auxin.
Plants also require zinc for the synthesis of tryptophan, a key amino acid in the synthesis of the auxin indoleacetic acid. Therefore, zinc also operates in the control of plant development through its indirect action on auxins.