Q940
Plant deficient in zinc, show reduced biosynthesis of growth hormone
A.
Cytokinin
B.
Auxin
AnswerC.
Abscisic acid
D.
Ethylene
Answer: Option B
Solution
Answer: Option B
Solution:
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.