Question

Which of the plant hormones are responsible for the following processes? Promote cell division Inhibition of growth Detection of light Wilting of leaves

Hint:

Cytokinin → Cell division. Auxin → Light response. ABA → Growth inhibition & wilting.

Answer 1

Plant Hormones Responsible for the Following Processes:

Plant hormones (phytohormones) are chemical substances produced in plants that control growth, development and responses to stimuli.

1. Promote Cell Division:
\[ \boxed{\text{Cytokinins}} \] Cytokinins stimulate cell division (cytokinesis) in plant tissues. They are mainly found in growing regions such as root tips and help in growth and development of plants.

2. Inhibition of Growth:
\[ \boxed{\text{Abscisic Acid (ABA)}} \] Abscisic acid is a growth-inhibiting hormone. It slows down plant growth and promotes dormancy in seeds and buds.

3. Detection of Light:
\[ \boxed{\text{Auxins}} \] Auxins help plants respond to light. They are responsible for phototropism, where the plant bends toward light. Auxin accumulates on the shaded side, causing that side to elongate more.

4. Wilting of Leaves:
\[ \boxed{\text{Abscisic Acid (ABA)}} \] Abscisic acid promotes wilting and closing of stomata during water stress, helping the plant conserve water.

Conclusion:
Cytokinins promote cell division, Auxins help in detection and response to light, and Abscisic acid inhibits growth and causes wilting of leaves.