Application of Phytohormones in Agriculture

5.3

Application of Phytohormones in Agriculture

Pengenalan kepada Fitohormon

Important chemicals that are directly involved in the development of flowers, fruits, stems and roots.
Phytohormones can exist naturally or be synthesised in the laboratory.
There are phytohormones that can be extracted for multiple purposes 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.

The Purpose of Bananas on Tress are Wrapped with Waterproof Straw Sacks

To speed up the ripening process using the ethylene gas that is trapped in the sacks.

5.3

Application of Phytohormones in Agriculture

Pengenalan kepada Fitohormon

Important chemicals that are directly involved in the development of flowers, fruits, stems and roots.
Phytohormones can exist naturally or be synthesised in the laboratory.
There are phytohormones that can be extracted for multiple purposes 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.

The Purpose of Bananas on Tress are Wrapped with Waterproof Straw Sacks

To speed up the ripening process using the ethylene gas that is trapped in the sacks.