Shivashankar, S.Kasturi Bai, K.V.2014-05-232014-05-232007-02-08J.Plantn.Crops 1989 Suppl. v-16 p-55-60http://hdl.handle.net/123456789/1672Induction of nitrate reductase (NR) activity by nitrate in leaves of low and high yielding coconut palms was markedly different, requiring different levels of nitrate for optimum induction. Ammonium enhanced induction of NR activity by nitrate, under both light and dark conditions. Nitrate uptake was also enhanced in the presence of ammonium in the induction medium. It is postulated that ammonium might bring about the activation of NR by binding to an allosteric site on the enzyme in addition to its role in inducing NR synthesis.enammoniumnitrate induced nitrate reductase activitycoconutArticle