giberellins
giberellins Plant growth substances derived from giberellic acid, originally found in the fungus Gibberella fujikori growing on rice. About thirty giberellins are known; they cause stem extension and allow mutant dwarf forms of plants to revert to normal size, induce flower formation, and break bud dormancy. They are used to accelerate the germination of barley for malting.
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Auxin , auxin
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giberellins