LAQ : Describe the sources and functions of auxin

Question

Describe the sources and functions of auxin.

Answer

Sources of Auxin:

1. Apical meristems of shoot and root tips.
2. Young leaves.
3. Developing seeds and fruits.
4. Vascular tissues.

Functions of Auxin:

1. Stem elongation: Promotes cell elongation, resulting in the elongation of stems and shoots.
2. Apical dominance: Inhibits the growth of lateral buds, directing growth towards the apex.
3. Root development: Stimulates root growth and differentiation.
4. Phototropism: Influences the bending of plant parts towards a light source.
5. Gravitropism: Regulates the orientation of plant growth in response to gravity.
6. Fruit development: Promotes the development and ripening of fruits.