Ammonium enhances the nitrate induced nitrate reductase activity in coconut (Cocos nucifera L.) leaves
Loading...
Date
2007-02-08
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Induction 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.
Description
Keywords
ammonium, nitrate induced nitrate reductase activity, coconut,
Citation
J.Plantn.Crops 1989 Suppl. v-16 p-55-60