Rapid changes in protein phosphorylation associated with light-induced gravity perception in corn roots.
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.
McFadden
J J
JJ
Department of Horticulture and Landscape Architecture, Washington State University, Pullman, 99164-6414, USA.
Poovaiah
B W
BW
D000001:Calcimycin / Q000494:pharmacology; D002118:Calcium / Q000378:metabolism; D004533:Egtazic Acid / Q000494:pharmacology; D018522:Gravitropism; D018466:Gravity Sensing / Q000502:physiology*; D008027:Light; D010750:Phosphoproteins / Q000302:isolation & purification; D010766:Phosphorylation / Q000187:drug effects / Q000528:radiation effects*; D010940:Plant Proteins / Q000378:metabolism; D018517:Plant Roots / Q000502:physiology*; D015398:Signal Transduction / Q000502:physiology; D003313:Zea mays / Q000502:physiology*
D010750:Phosphoproteins; D010940:Plant Proteins; D000001:Calcimycin; D004533:Egtazic Acid; D002118:Calcium