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22.776 Keywords • 48.499 Synonyms • 5.298 Translations • 7.909 Pronunciations • 151.251 Cross-references

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Collective term for chemical messengers (signal 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. It is often 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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