title: Regulation of ADPGlucose Synthesis in Guard Cells of Commelina communis.
abstract: The activator specificity of the ADPglucose pyrophosphorylase from Commelina communis guard cells is the same as observed for the mesophyll cell enzyme. 3-Phosphoglycerate was found to be the most effective activator. Fifty per cent of maximal stimulation was observed at about 100 micromolar. Inorganic phosphate was found to be a potent inhibitor giving 50% inhibition at 0.3 millimolar. These results are discussed with respect to regulation of starch synthesis in guard cells.
authors: Department of Biochemistry and Biophysics, University of California, Davis, California 95616.
authors: N L
authors: NL
authors: Robinson
authors: E
authors: E
authors: Zeiger
authors: J
authors: J
authors: Preiss