Question 10
What is cytokinin? Name the sources from which it is secreted. Mention its function.
Answer
Cytokinins, also known as kinins, are a class of plant hormones that regulate various developmental processes in plants. They are primarily synthesized in the root apical meristem and are also found in developing embryos, young leaves, and fruits.
Some important functions of cytokinins include:
- Stimulating cell division and differentiation
- Regulating apical dominance by promoting lateral bud growth
- Delaying senescence in leaves and other organs
- Promoting the formation of chloroplasts and thylakoid membranes
- Increasing tolerance to abiotic stress such as drought, salinity, and high temperature.
Cytokinins work in conjunction with other plant hormones such as auxins and gibberellins to regulate various physiological processes in plants.
