Abstract
Increasing water stress by means of polyethylene glycol (PEG) greatly affects protein content and the activities of phosphoenolpyruvate carboxylase (E.C. 4.1.3.1), ribulose-1,5-bisphosphate carboxylase oxygenase (E.C. 4.1.1.39), and glycolic acid oxidase (E.C. 1.1.3.1) in maize ( Zea mays L.) and wheat ( Triticum aestivum L.) seedlings. Under the same experimental conditions superoxide dismutase (E.C. 1.15.1.1) activity is not affected in maize but increases in wheat. These results possibly support a recent hypothesis of drought-induced selective protein degradation in plants. A possible protective role of superoxide dismutase against the effects of water stress on membrane function is discussed.
Published Version
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