biosynthesis of cytokinins in crown-gall tissue of Vinca rosea

The crown-gall tissue of Vinca rosea converts labelled adenine into cytokinins. The principal initial products appear to be ribosylzeatin phosphates; zeatin and ribosylzeatin are also produced in appreciable quantities. The efficiency of conversion of adenine into cytokinins suggests a pathway of sy...

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Bibliographic Details
Published in:Planta 1979-12, Vol.147 (2), p.97-102
Main Authors: Stuchbury, T, Palni, L.M, Horgan, R, Wareing, P.F
Format: Article
Language:English
Subjects:
plant biochemistry
plant physiology
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Summary:The crown-gall tissue of Vinca rosea converts labelled adenine into cytokinins. The principal initial products appear to be ribosylzeatin phosphates; zeatin and ribosylzeatin are also produced in appreciable quantities. The efficiency of conversion of adenine into cytokinins suggests a pathway of synthesis independent of turnover of tRNA. Isopentenyl adenine or its derivatives do not appear to be intermediates in the conversion of adenine to zeatin compounds. Cytokinins in V. rosea turnover rapidly and further metabolism of zeatin derivatives seems to result in their conversion into glucosides which are the main cytokinin active compounds in the tissue.
ISSN:0032-0935
1432-2048
DOI:10.1007/BF00389507