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Plant Hormones

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by

Brigitte Guindon

on 28 April 2010

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Transcript of Plant Hormones

PLANT HORMONES Growth Promoters Growth Inhibitors Auxins Gibberellins Cytokinins Oligosaccharins Abscisic Acid (ABA) Ethylene Found in meristematic tissue
Promotes cell division and elongation
Involved in Tropism Promotes cell division, elongation and seed germination
Stimulates new cell growth and cell division in rapidly growing regions
Prevents leaf aging Stimulates plants to manufacture antibiotics in response to infection by fungi or bacteria
It also functions this way in humans Stimulates ageing of plants and fruit ripening Inhibits seed germination
Causes closure of stomates
Blocks action of promoter hormones
USES? Easy to cultivate since it can be produced by fermenting a type of fungi (Gibberella fujikuroi) USES? This is a dynamic field
Research is being conducted to see how we can use it to prevent infections in crops.
Used to promote seed or bud dormancy in periods of high stress.
What causes stress in plants?

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