The biosynthesis of cytokinins in crown-gall tissue of Vinca rosea |
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| Authors: | T Stuchbury L M Palni R Horgan P F Wareing |
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| Institution: | (1) Department of Botany and Microbiology, University College of Wales, SY23 3DA Aberystwyth, U.K.;(2) Present address: Department of Agricultural Biochemistry, University of Aberdeen, 581 King Street, AB9 1UD Aberdeen, U.K. |
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| Abstract: | 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.Abbreviations HPLC
high performance liquid chromatography
- AMP
adenosine monophosphate
- TLC
thin-layer chromatography
- GLC
gas-liquid chromatography |
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| Keywords: | Crown-gall Cytokinin biosynthesis Vinca |
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