Plant Physiol. Drug Metab Dispos
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Plant Physiology 67:1181-1184 (1981)
© 1981 American Society of Plant Biologists

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Articles

Cytokinin-Active Ribonucleosides in Phaseolus RNA

I. IDENTIFICATION IN tRNA FROM ETIOLATED PHASEOLUS VULGARIS L. SEEDLINGS 1

Cynthia A. Edwards2 and Donald J. Armstrong3

Richard W. Kaiss-Chapman4 and Roy O. Morris

Department of Botany and Plant Pathology, Oregon State University, Corvallis, Oregon 97331, Department of Agricultural Chemistry, Oregon State University, Corvallis, Oregon 97331

The cytokinin-active ribonucleosides present in tRNA from etiolated Phaseolus vulgaris L. seedlings have been isolated and identified as cis-ribosylzeatin, 2-methylthio-ribosylzeatin, and N6-({Delta}2-isopentenyl)-adenosine. The structures of the compounds were established on the basis of their chromatographic properties and the mass spectra of their permethylated and perdeuteromethylated derivatives. Cis-ribosylzeatin was the major cytokinin-active constituent of tRNA from this source.

2 Present address: Department of Biology, University of California, San Diego, La Jolla, CA 92093.

3 To whom reprint requests should be addressed.

4 Present address: MSU/ERDA Plant Research Laboratory, Michigan State University, East Lansing, MI 48824.

1 This research was supported by National Science Foundation Grants PCM 77-04266 to D.J.A. and 78-22963 to R.O.M., by a National Science Foundation Predoctoral Fellowship to C.A.E., and by the Science and Education Administration of the United States Department of Agriculture under Grant 5901-0410-8-0028-0 to D.J.A. and 5901-0410-8-0190-0 to R.O.M. from the Competitive Research Grants Office. This is Technical Paper 5578 of the Oregon Agricultural Experiment Station.






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ASPB Publications PLANT PHYSIOLOGY THE PLANT CELL
Copyright © 1981 by the American Society of Plant Biologists