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The Commercial Use Of Plant Hormones

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The Commercial Use Of Plant Hormones A phytohormone is a natural plant substance, which controls plant activities. They are synthesised in one place and translocated. They trigger major plant responses; the main five are auxin, ethene, cytokinin, gibberellic acid and abscissic acid. Plant growth regulators, include plant hormones, both natural and synthetic and have many uses in greenhouse production. Auxins were the first plant hormones to be discovered, they stimulate the elongation and growth of cells. They also influence the development of vascular tissue and fruits. Synthetic auxins are used to stimulate root development on stem cuttings for asexual propagation of woody plant species; this means that horticulturists can produce woody plant species quicker for sale. ...read more.


Auxins are also used to prevent pre harvest fruit drop. Ethene is used to quicken the ripening of fruit. This ensures a longer shelf life for the fruit so more profit can be made from them. It is used commercially to ripen bananas on their journey to England from the Bahamas. The ethene is also used to evoke flower initiation. "Degreening" oranges, lemons and grapefruits also require ethylene. Cytokinins cause cell division, not growth. The cytokinin causes resting cells to become mitotic this is seen in coconuts. Cytokinin is usually used in conjunction with auxin, it is commercially used to delay senescence in plants therefore allowing them a longer shelf life. ...read more.


Abscissic acid promotes the dormancy of plants so can prolong their shelf life, it can also be used to adapt plants to low humidity environments as it controls stomata opening. Abscissic acid can also be used to promote fruit drop in plants, or at least prepare plants for the picking of their fruit so little damage is done. The extent to which plant hormones are used will affect the change they will cause to the plant, combinations of hormones are used to heighten some effects and suppress others. The balance is critical some hormones need to be present at 1 ppm to change the characteristics of a plant drastically. So the highest amount of precision is needed when dealing with plant hormones. WARREN MINNS ...read more.

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