Regulation of ADPGlucose Synthesis in Guard Cells of Commelina communis | Zendy

Nina L. Robinson | Zendy; Eduardo Zeiger | Zendy; Jack Preiss | Zendy

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Regulation of ADPGlucose Synthesis in Guard Cells of Commelina communis

Author(s) -

Nina L. Robinson,

Eduardo Zeiger,

Jack Preiss

Publication year - 1983

Publication title -

plant physiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.554

H-Index - 312

eISSN - 1532-2548

pISSN - 0032-0889

DOI - 10.1104/pp.73.3.862

Subject(s) - guard cell , activator (genetics) , starch , enzyme , stimulation , biochemistry , phosphate , chemistry , microbiology and biotechnology , biology , gene , endocrinology

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.

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