Shivashankar, S.Rajgopal, K.2014-06-052014-06-051983Z. Pflanzenphysiol. Bd. 112. S. 181-185. 1983.http://hdl.handle.net/123456789/2391Nitrate 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.enCocos nucifera L.nitrate reductase diurnal rhythmArticle