Application of Phytohormones in Agriculture

5.3

Application of Phytohormones in Agriculture

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