What are four plant hormones and their functions?
What are four plant hormones and their functions?
The four plant hormones and their functions are as follows:
- Auxin: It promotes cell enlargement and cell differentiation in plants.
- Gibberelins: It breaks the dormancy in seeds and buds.
- Cytokinins: It promotes cell division in plants.
- Abscisic acid: It promotes closing of stomata.
What are the functions of the five plant growth hormones?
There are currently five recognized groups of plant hormones: auxins, gibberellins, cytokinins, abscisic acid (ABA) and ethylene. They work together coordinating the growth and development of cells. Ethylene is mainly involved in abscission and flower secscence in plants and is rarely used in plant tissue culture.
What are three key plant hormones and what is their function?
A hormone is any chemical produced in one part of the body that has a target elsewhere in the body.
What are the five main plant hormones?
Since 1937, gibberellin (GA), ethylene, cytokinin, and ab- scisic acid (ABA) have joined auxin as phytohormones, and together, they are regarded as the “classical five” (Fig- ure 1).
What are the different plant hormones and their functions Class 10?
Types of Plant Hormones
| Hormone | Function |
|---|---|
| Gibberellins | Break the dormancy of seeds and buds; promote growth |
| Cytokinins | Promote cell division; prevent senescence |
| Abscisic Acid | Close the stomata; maintain dormancy |
| Auxins | Involved in tropisms and apical dominance |
What are plant hormones write two important functions of auxin?
Auxin induces shoot apical dominance; the axillary buds are inhibited by auxin. The high concentration of auxin directly stimulates ethylene synthesis in axillary buds, causing inhibition of their growth and potentiation of apical dominance.
What is the importance of plant hormones in agriculture sector?
Each hormone has a distinct job and for oilseed, pulse and cereal crops, auxins and cytokinins can greatly improve plant vigor, promote growth of roots and shoots and reduce stress.
What is the function of auxin and cytokinin?
A main feature is that as auxins and cytokinins are critical to regulate cell division and differentiation, these hormones are therefore tightly associated with the formation of new organs such as lateral roots, nodules on legume roots in response to rhizobia, as well as galls for example in response to A.
What is the function of plant hormone auxin?
What are the major functions? Answer: Auxin promotes cell growth and elongation of the plant. In the elongation process, auxin alters the plant wall plasticity making it easier for the plant to grow upwards. Auxin also influences rooting formations.