scholarly journals NITROGEN AND PHOSPHORUS METABOLISM OF ANABAENA DOLIOLUM UNDER UV-B AND PESTICIDE STRESS

2021 ◽  
Vol 21 (no 1) ◽  
Author(s):  
Vandana Pandey
Keyword(s):  
Nitrate Reductase Activity ◽  
Reductase Activity ◽  
Phosphorus Metabolism ◽  
Nitrogen And Phosphorus ◽  
Anabaena Doliolum ◽  
Pesticide Stress ◽  
Additive Type ◽  
Cyanobacterium Anabaena ◽  
Type Of Behavior ◽  
Different Doses

The effects of UV-B and pesticides (Butachlor and Carbofuran) on nitrogen and phosphorus metabolism have been studied on filamentous, nitrogen-fixing cyanobacterium, Anabaena doliolum. The study showed a decrease in the uptake of NH4+, PO4-3, activities of nitrogenase, glutamine synthetase, and alkaline phosphatase, when the cells were exposed to UV-B and pesticides. The interaction of two stresses showed the additive type of behavior for the studied parameters. In contrast, a significant increase in NO3- uptake and nitrate reductase activity was seen when Anabaena cells were exposed to different doses of UV-B.

Further Studies on the Induction of Nitrate Reductase by Arginine in the Filamentous Cyanobacterium Oscillatoria chalybea

1992 ◽  
Vol 47 (7-8) ◽  
pp. 540-544 ◽  
Author(s):  
J. Bednarz ◽  
G. H. Schmid
Keyword(s):  
Nitrogen Fixation ◽  
Nitrate Reductase ◽  
Nitrate Reductase Activity ◽  
Reductase Activity ◽  
Filamentous Cyanobacterium ◽  
Nitrogen Fixation Activity ◽  
Fixation Activity ◽  
Cyanobacterium Anabaena ◽  
Oscillatoria Chalybea ◽  
Anabaena Pcc7120

In an earlier publication we reported on the role of arginine for the development of nitrate reductase activity in cells of the filamentous cyanobacterium Oscillatoria chalybea (Bednarz and Schmid, Z. Naturforsch. 46c, 591 (1991)). In the present paper we present further evidence that arginine is the natural inducer for nitrate reductase activity. Thus, we show that the induction is regulated by transcription, probably related to the apoprotein or the molybdenumcofactor. We also examined the influence of arginine on nitrate reductase activity in the filamentous cyanobacterium Anabaena PCC7120. In contrast to Oscillatoria chalybea this cyanobacterium forms heterocysts and shows nitrogen fixation activity. Like in Oscillatoria chalybea nitrate reductase activity in Anabaena PCC7120 is stimulated in the presence of arginine as the sole nitrogen source. However, this stimulation is limited to an early growth stage. Subsequently, nitrogen fixation activity appears and nitrate reductase activity decreases.

Nitrate Reductase Activity of Maize Hybrids and Their Parental Inbred 1

Crop Science ◽  
1966 ◽  
Vol 6 (2) ◽  
pp. 169-173 ◽  
Author(s):  
L. E. Schrader ◽  
D. M. Peterson ◽  
E. R. Leng ◽  
R. H. Hageman
Keyword(s):  
Nitrate Reductase ◽  
Nitrate Reductase Activity ◽  
Reductase Activity ◽  
Maize Hybrids ◽  
Parental Inbred

Chromosomal Control of Nitrate Reductase Activity in Hexaploid Wheat 1

Crop Science ◽  
1982 ◽  
Vol 22 (1) ◽  
pp. 85-88 ◽  
Author(s):  
E. L. Deckard ◽  
N. D. Williams ◽  
J. J. Hammond ◽  
L. R. Joppa
Keyword(s):  
Nitrate Reductase ◽  
Hexaploid Wheat ◽  
Nitrate Reductase Activity ◽  
Reductase Activity
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