PGRs 2009 - Hormones Plant hormones are endogenous organic...

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Unformatted text preview: Hormones Plant hormones are endogenous organic compounds active at very low concentration, produced in one tissue, and translocated to another point in the plant where their effects on growth and development are manifested. • auxin (indoleacetic acid) • cytokinins (zeatin, zeatin riboside, isopentenyl adenine) • gibberellins (GA x...125 ) • abscisic acid (ABA) • ethylene • others (real and fabled; jasmonic acid, brassinolide, florigen, juvenone) Class Endogenous Hormone Growth Regulators auxin indoleacetic acid IBA, NAA, 2,4-D, others cytokinin zeatin, zeatin riboside kinetin, BA, 2iP, TDZ gibberellin GA x...125 GA 3 , GA 4+7 abscisic acid abscisic acid (ABA) ethylene ethylene Ethephon, Ethrel Hormones Auxin (indoleacetic acid) Produced in apical and root meristems, young leaves, seeds in developing fruits. • cell elongation and expansion • suppression of lateral bud growth • initiation of adventitious roots • stimulation of abscission (young fruits) or delay of abscission • hormone implicated in tropisms (photo-, gravi-, thigmo-) Auxin-like growth regulators...
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This note was uploaded on 07/23/2011 for the course HOS 6737c taught by Professor Moore during the Spring '09 term at University of Florida.

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PGRs 2009 - Hormones Plant hormones are endogenous organic...

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