Phytochrome regulation of nitrate reductase in wheat

Ramaswamy, O. ; Saxena, I. M. ; Guha-Mukherjee, Sipra ; Sopory, Sudhir K. (1983) Phytochrome regulation of nitrate reductase in wheat Journal of Biosciences, 5 (1). pp. 63-69. ISSN 0250-5991

PDF - Publisher Version

Official URL:

Related URL:


In excised wheat leaves, the activity of nitrate reductase was enhanced by a brief pulse of red light and this increase was reversed by far-red light irradiation. Even under continuous far-red light, nitrate reductase activity increased by 258% after 18 h. When leaves were kept in distilled water during exposure to red light and then transferred to potassium nitrate, there was no difference in endogenous nitrate concentration. The nitrate reductase activity was the same whether leaves were floated in potassium nitrate or in distilled water during irradiation. Partial to complete inhibition of enzyme activity was observed when leaves were incubated in actinomycin-D and cycloheximide respectively, following 4 h of red light irradiation.In vitro irradiation of extract had no significant effect on nitrate reductase activity.

Item Type:Article
Source:Copyright of this article belongs to Indian Academy of Sciences.
Keywords:Phytochrome; Nitrate Reductase; Wheat
ID Code:15661
Deposited On:13 Nov 2010 12:46
Last Modified:17 May 2016 00:31

Repository Staff Only: item control page