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23.030 Keywords • 48.228 Synonyms • 5.303 Translations • 28.336 Pronunciations • 154.274 Cross-references

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Collective term for chemical messengers (signaling molecules) of higher plants. These plant hormones control important biochemical processes for differentiation and growth. It can be called the nervous system of plants. The substances present only in very small amounts are physiologically highly effective. The content depends on the state of development of the plant. Often it is not the absolute concentration that is decisive, but the ratio of the individual phytohormones to one another. These often interact. The most important are abscisic acid. auxins. cytokinins and gibberellins, See a list of varietal keywords below grapevine,

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