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. 1987 Dec;85(4):916–921. doi: 10.1104/pp.85.4.916

Conversion of Xanthoxin to Abscisic Acid by Cell-Free Preparations from Bean Leaves 1

Ram K Sindhu 1,2, Daniel C Walton 1,2
PMCID: PMC1054369  PMID: 16665831

Abstract

Cell-free extracts from the leaves of Phaseolus vulgaris L. convert xanthoxin to abscisic acid. The enzyme activity in dialyzed or acetone-precipitated extracts shows a strong dependence on either NAD or NADP. The enzyme activity appears to be cytosolic with no significant activity observed in chloroplasts. The activity was observed in extracts from roots of Phaseolus vulgaris, and also in extracts prepared from the leaves of Pisum sativum L., Zea mays L., Cucurbita maxima Duchesne, and Vigna radiata L. Neither water stress nor cycloheximide appear to significantly affect the level of enzyme activity in leaves. No intermediates between xanthoxin and abscisic acid were detected.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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