Plant Physiol. Drug Metab Dispos
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Plant Physiology 86:332-334 (1988)
© 1988 American Society of Plant Biologists

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Development and Growth Regulation

Rapid Changes in Protein Phosphorylation Associated with Light-Induced Gravity Perception In Corn Roots 1

J. J. McFadden and B. W. Poovaiah

Laboratory of Plant Molecular Biology and Physiology, Department of Horticulture and Landscape Architecture, Washington State University, Pullman, Washington 99164-6414

The effect of light and calcium depletion on in vivo protein phosphorylation was tested using dark-grown roots of Merit corn. Light caused rapid and specific promotion of phosphorylation of three polypeptides. Pretreatment of roots with ethylene glycol bis N,N,N', N' tetraacetic acid and A23187 prevented light-induced changes in protein phosphorylation. We postulate that these changes in protein phosphorylation are involved in the light-induced gravity response.

1 Suported by NSF grant DCB-8502215 and NASA grant NAG-10-0032 to B. W. P. Scientific Paper No. 7816, College of Agriculture and Home Economics Research Center, Washington State University, Pullman, WA 99164-6414.






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Copyright © 1988 by the American Society of Plant Biologists