Plant Physiol. Drug Metab Dispos
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Plant Physiology 100:1392-1395 (1992)
© 1992 American Society of Plant Biologists

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Environmental and Stress Physiology

Ubiquitin Conjugation to Protein Increases following Chilling of Clerodendrum Leaves 1

Esther Gindin and Amihud Borochov

Horticulture, Faculty of Agriculture, The Hebrew University of Jerusalem, Rehovot, Israel 76-100

The protein content of clerodendrum (Clerodendrum speciosum) leaves declines following chilling (48 h, 3°C). Using western and dot blots and fluorescence immunoassays, we found that isolated leaf proteins had more conjugated ubiquitin following chilling. In contrast, the amount of free ubiquitin declined by almost 90% after chilling. The increase in ubiquitin conjugation was greater in the membrane fraction than in the soluble fraction.

1 This research was supported in part by the U.S.-Israel Binational Agricultural Research and Development Fund (BARD) I-1302-87.






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ASPB Publications PLANT PHYSIOLOGY THE PLANT CELL
Copyright © 1992 by the American Society of Plant Biologists