Plant hormone and growth regulators - 3 views
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(Table 5)
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Hormones are produced naturally by plants, while plant growth regulators are applied to plants by humans
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This is interesting because it shows you that if you want to manipulate hormones in an experiment you can use plant growth regulators to mimic the action of hormones.
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There are five groups of plant-growth-regulating compounds: auxin, gibberellin (GA), cytokinin, ethylene, and abscisic acid (ABA).
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Ethylene is unique in that it is found only in the gaseous form. It
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induces ripening, causes leaves to droop (epinasty) and drop (abscission), and promotes senescence.
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The effects of ethylene (promotion of both aging/death and ripening) may explain why just one bad apple in a basket may spoil the whole bunch.
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Plant hormones and growth regulators are chemicals that affect flowering; aging; root growth; killing of leaves; prevention or promotion of stem elongation; color enhancement of fruit; prevention of leafing and/or leaf fall; etc.
