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Physiological studies on salinity and nitrogen interaction in alfalfa plants. III. Nitrate reductase activity

Author:
Khan, M.G., Silberbush, M., Lips, S.H.
Source:
Journal of plant nutrition 1995 v.18 no.11 pp. 2495-2500
ISSN:
0190-4167
Subject:
Medicago sativa, oxidoreductases, enzyme activity, roots, leaves, nutrient availability, nitrates, salinity, sodium chloride, nitrate reductase (NADH), ammonium compounds
Abstract:
Nitrate reductase activity (NRA) was determined to investigate the effect of salinity and nitrogen (N) interactions on alfalfa [Medicago sativa (L) cv. Gilboa] during its vegetative growth. Increasing levels of sodium chloride (NaCl) (0, 30, 65, and 100 mM) decreased NRA in both plant parts, i.e., root and leaf, however to a lesser extent in leaves. The inclusion of N either as nitrate (NO3) or ammonium (NH4) (0, 3, and 6 mM) to the nutrient medium resulted in a substantial enhancement of NR activity in salinized and non-salinized plants as well.
Agid:
1419545