Abstract

Summary Excised rice (Oryza sativa L. cv. Ratna ) leaves were air-dried or kept turgid by floating them on water at a temperature of 30 ± 2 °C. Acid inorganic pyrophosphatase activity increased but alkaline inorganic pyrophosphatase and catalase activities decreased both in the air-dried and turgid leaves except that the rates of change were rapid in the turgid leaves in comparison to the air-dried leaves. Peroxidase activity, on the other hand, decreased in the air-dried leaves but increased in the turgid leaves. It is concluded that all enzymes do not behave in the same manner in the air-dried and turgid leaves with time.

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