Plant Growth and Development Question 64
64. Leaf fall can be prevented with the help of
(a) abscisic acid
(b) auxins
(c) florigen
(d) cytokinins
Show Answer
Answer : d
Hints & Solutions
(d) It is due to Richmond-Lang effect. Cytokinins prevent degeneration of chlorophyll, proteins and nucleic acids. They increase of inflow of auxin and amino acids. It reactivates leaf metabolism.
