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One of a group of plant hormones that have a wide variety of effects on plant growth. They are produced by plant seeds, algae, mosses, ferns and fungi (especially those in genus Gibberella). Gibberellins can produce dramatic growth, especially in plant stems. They are relatively expensive, but have been used in the production of seedless grapes and navel oranges and have been found to reverse the effects of some herbicides.

Selected gibberellin links:

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