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Title: Metabolism of /sup 14/C-zeatin in Phaseolus embryos: occurrence of O-xylosyldihydrozeatin and its ribonucleoside. [Phaseolus acutifolius; Phaseolus coccineus]

The metabolism of trans-(8-/sup 14/C)zeatin was examined in embryos of Phaseolus acutifolius A. Gray P.I. 321637 and Phaseolus coccineus Lam. cys Scarlet Runner and Desiree. In both species zeatin was converted to ribosylzeatin, ribosylzeatin 5'-monophosphate, O-glucosyl-9-ribosylzeatin and the recently discovered O-xylosyl derivatives of zeatin and ribosylzeatin. Two new metabolites, identified by enzyme degradation and gas chromatography-mass spectrography analyses as O-xylosyldihydrozeatin and its ribonucleoside, were recovered from P. coccineus embryos. From this and previous studies it may be concluded that the potential to form O-xylosyl derivatives of zeatin is present only in embryos of three Phaseolus species (P. vulgaris L., P. coccineus, and P. acutifolius), but not in P. lunatus L., while the reduction of the side chain is most prominent in P. coccineus.
Authors:
;
Publication Date:
OSTI Identifier:
6075385
Resource Type:
Journal Article
Resource Relation:
Journal Name: Plant Physiol.; (United States); Journal Volume: 84:3
Research Org:
Oregon State Univ., Corvallis
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES; PLANT GROWTH REGULATORS; METABOLISM; METABOLITES; SEEDS; CARBON 14 COMPOUNDS; GAS CHROMATOGRAPHY; MASS SPECTROSCOPY; NUCLEOSIDES; PHASEOLUS; TRACER TECHNIQUES; BACTERIA; CHROMATOGRAPHY; ISOTOPE APPLICATIONS; LABELLED COMPOUNDS; LEGUMINOSAE; MICROORGANISMS; NUCLEOTIDES; ORGANIC COMPOUNDS; PLANTS; RHIZOBIUM; RIBOSIDES; SEPARATION PROCESSES; SPECTROSCOPY 550201* -- Biochemistry-- Tracer Techniques