Plant Growth and Development Question 36
36. Plants deficient of element zinc, show its effect on the biosynthesis of plant growth hormone
(a) abscisic acid
(b) auxin
(c) cytokinin
(d) ethylene
Show Answer
Answer : b
Hints & Solutions
(b) Zinc is one of the components of auxin. Zinc deficiency occurs when plant growth is limited because the plant cannot take up sufficient quantities of this essential micronutrient from its growing medium. It is one of the most widespread macronutrient deficiencies in crops and pastures worldwide and causes large losses in crop production and crop quality.
