Diurnal Rhythm in Nitrate Reductase Activity of Cocos nucifera L. Leaves

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Date

1983

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Abstract

Nitrate reductase (NR) activity in the leaves of Cocos nucifera L. exhibited a strong diurnal rhythm with a peak at 2 p.m. This rhythm was maintained under permanent dark or light conditions indicating the endogenous control of the rhythm. The NR activity was independent of tissue nitrate level. The study suggested a possible regulatory role of sugars on leaf NR activity.

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Keywords

Cocos nucifera L., nitrate reductase diurnal rhythm

Citation

Z. Pflanzenphysiol. Bd. 112. S. 181-185. 1983.

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