Vijayaraghavan, S. Janaki ; Gupta, Aditya ; Guha-Mukherjee, Sipra ; Sopory, Sudhir K. (1982) Stimulation of nitrate reductase by light and ammonium in Spirodela oligorrhiza Journal of Experimental Botany, 33 (4). pp. 705-716. ISSN 0022-0957
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Official URL: http://jxb.oxfordjournals.org/cgi/content/abstract...
Related URL: http://dx.doi.org/10.1093/jxb/33.4.705
Abstract
Light - enhanced nitrate reductase (NR) activity was 8 times greater than the dark control. Exogenous application of sucrose, glucose and fructose increased the induction of NR in the light as well as in the dark, whereas glycolate had no effect. DCMU [3 - (3, 4 - dichlorophenyl) - 1, 1- dimethyl urea] completely inhibited the development of NR in light. Sucrose, when added with DCMU, reversed this inhibitory effect NR in vivo was more stable in light than in darkness, the half - lives being 9.6 h and 6.4 h, respectively. The addition of sucrose did not change the half - life of NR in either light or darkness. Ammonium, the end product of the inorganic nitrogen assimilatory pathway, stimulated the NR activity whereas amino acids decreased it.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Oxford University Press. |
| Keywords: | Spirodela oligorrhiza; Nitrate Reductase; Ammonium Light |
| ID Code: | 15653 |
| Deposited On: | 13 Nov 2010 12:46 |
| Last Modified: | 02 Jun 2011 08:24 |
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