Question

The Cytokinins are known to:

• A. Inhibit cytoplasmic movement
• B. Help in retention of chlorophyll
• C. Influence water movement
• D. Promote abscission layer formation

Answer 1

The correct option is B Help in retention of chlorophyll

Less chlorophyll and degeneration of proteins are the two important symptoms of senescence.

Cytokinins delay these processes and, thus senescence is also delayed. This effect of cytokinin is known as Richmond-Lang effect.

Cytokinins are plant hormones that have an important role in growth and development of plant. It plays important role in controlling aging process. Senescence of leaves is delayed when cytokinin is sprayed to the leaves as it helps in retention of chlorophyll. Hence, it keeps leaves green for longer time.

Thus, the correct answer is option B.