The senescence retarding ability and metabolism of trihydroxy-zeatin in Avena leaf segments |
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Authors: | A D Bayley J Van Staden |
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Institution: | (1) UN/CSIR Research Unit for Plant Growth and Development, Department of Botany, University of Natal, 3200 Pietermaritzburg, Republic of South Africa |
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Abstract: | 6-(2,3,4-Trihydroxy-3-methylbutylamino) purine, trivial name trihydroxy-zeatin (THZ), an oxidation product of zeatin was applied via the epidermis or cut end of Avena leaf segments. THZ did not retard senescence of the segments in either case. With epidermal application THZ remained unmetabolised while the cut end method of application resulted in its metabolism to more polar THZ metabolites of unknown identity. The Avena leaf tissue did not apparently cleave the isoprenoid side chain of the THZ molecule. |
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Keywords: | Avena leaf segments kinetin trihydroxyzeatin zeatin |
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