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IES

Abbreviation for indolylacetic acid; see under auxins.

Important phytohormones (indole-3-acetic acid = often abbreviated as IES) for regulating plant growth, produced in the active growth zones of the plant such as shoot and root tips. In interaction with abscisic acid and cytokinins, various processes are controlled. In low concentrations, auxins promote the elongation growth of the cotyledons, the shoot...

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