Functions of Five Plant Hormones
Plant hormones, or phytohormones, play crucial roles in regulating various physiological processes in plants. Here are five important plant hormones and their functions:
1. Auxins
- Promote cell elongation, particularly in stems.
- Involved in root development and differentiation.
- Regulate phototropism and gravitropism, guiding plant growth toward light and gravity.
- Play a role in apical dominance, suppressing lateral bud growth.
2. Gibberellins
- Stimulate stem elongation and seed germination.
- Induce flowering in some plants, especially long-day plants.
- Promote enzyme production that aids in seed metabolism.
- Enhance fruit development and size.
3. Cytokinins
- Promote cell division and growth, particularly in roots and shoots.
- Delay leaf senescence, keeping leaves green for longer periods.
- Work in conjunction with auxins to regulate growth patterns.
- Influence nutrient mobilization and distribution within the plant.
4. Abscisic Acid (ABA)
- Acts as a stress hormone, regulating responses to drought and salinity.
- Promotes stomatal closure to reduce water loss during stress.
- Involved in seed dormancy, inhibiting germination until conditions are favorable.
- Regulates various developmental processes, including fruit ripening.
5. Ethylene
- Triggers fruit ripening and senescence in plants.
- Regulates the shedding of leaves, flowers, and fruits (abscission).
- Influences cell expansion and growth patterns, especially in response to stress.
- Plays a role in the plant's response to mechanical stress, such as bending or injury.
These hormones collectively enable plants to adapt to their environment and optimize their growth and development.

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unless u don't have it