Question
State the sources and function of gibberellins and cytokinin.
Answer
Sources of Gibberellins:
- Apical meristems of shoot and root tips.
- Young leaves.
- Developing seeds and fruits.
- Embryos.
Functions of Gibberellins:
- Promotes cell elongation, resulting in the elongation of stems and shoots.
- Stimulates seed germination by breaking dormancy and promoting the synthesis of hydrolytic enzymes.
Sources of Cytokinins:
- Root tips.
- Developing fruits and seeds.
- Young leaves.
- Apical meristems.
Functions of Cytokinins:
- Promotes cell division and differentiation, especially in meristematic tissues.
- Induces the formation and growth of new shoots from lateral buds.