| Phytohormone |
Application in Agriculture |
| Auxin |
- Application of auxin to flowers without fertilisation stimulates formation of seedless fruits,a phenomenon known as parthenocarpy.
- Application of auxin as rooting powder to stimulate growth of adventitious roots.
- Synthetic auxin. 2,4-D is used as weed killer to kill eudicot weeds.
- Natural and synthetic auxin is also used to delay fruit drops.
|
| Gibberellin |
- Stimulates stem elongation of dwarf plants.
- Speeds up seed germination.
- Stimulates increase in fruit size of grapes.
|
| Cytokinin |
- Stimulates production of root and shoot in tissue culture in the presence of auxin.
- Stimulates growth of root and stem.
- Prolong storage period of green leafy vegetables.
|
| Abscisic acid |
- Prevent seed germination in an appropriate season.
|
| Ethylene |
- Stimulates fruit ripening after import for marketing.
- Speeds up maturation in pineapple and watermelons.
|