ROLE OF NITRATE REDUCTASE IN NITROGEN FIXATION UNDER PHOTOSYNTHETIC REGULATION
*Mohd Mazid1, Taqi Ahmed Khan2, Firoz Mohammad1
1Advanced Plant Physiology Division, Department of Botany, Faculty of Life Sciences, AMU, Aligarh, India.
2Department of Biochemistry, Faculty of Life Sciences, AMU, Aligarh, India.
ABSTRACT
Nitrate reductase (EC: 1.6.6.1-3, NR) represents a short, soluble
electron transport chain localized in the cytosol, catalyzes the
NAD(P)H reduction of NO3 to NO2 and plays a key role in the
regulation of NO3 assimilation in lower and higher plants. Assimilatory
NR of higher plants is a most interesting enzyme, both from its central
function in plant primary metabolism and control of catabolic activity.
It is shown that light and plant hormone availability is the major
external triggers for the rapid and reversible modulation of NR
activity. As it is well known that products of light reaction reflects the
need to co-ordinate carbon (C) and nitrogen (N) assimilation. This
article summarizes the role of NR in N-fixation under photosynthetic
modulation in context with current scenario of CO2 enhancement. This
review also shades a small beam of light about NR as an environmental
remediation tool as well.
Keywords: Nucleotide sequencing, photosynthesis, higher plants, lower plants.
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