An Analysis of Seasonal Effects on Leaf Nitrate Reductase Activity and Nitrogen Accumulation in Maize (Zea mays L.)

2002 ◽  
Vol 188 (2) ◽  
pp. 133-137 ◽  
Author(s):  
S. Naresh Kumar ◽  
C. P. Singh
Keyword(s):  
Zea Mays ◽  
Nitrate Reductase ◽  
Nitrate Reductase Activity ◽  
Zea Mays L ◽  
Reductase Activity ◽  
Seasonal Effects ◽  
Nitrogen Accumulation ◽  
Leaf Nitrate

scholarly journals Polyaspartic Acid Improves Maize (Zea mays L.) Seedling Nitrogen Assimilation Mainly by Enhancing Nitrate Reductase Activity

Agronomy ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 188 ◽  
Author(s):  
Qingyan Wang ◽  
Huihui Tang ◽  
Guangyan Li ◽  
Hui Dong ◽  
Xuerui Dong ◽  
...  
Keyword(s):  
Zea Mays ◽  
Nitrate Reductase ◽  
Nitrogen Assimilation ◽  
Zea Mays L ◽  
Reductase Activity ◽  
Protein Accumulation ◽  
Nitrogen Accumulation ◽  
Maize Seedlings ◽  
Polyaspartic Acid ◽  
Nr Activity

Improvement of nitrogen use efficiency is of great importance in maize (Zea mays L.) production. In the present study, an eco-friendly growth substance, polyaspartic acid (PASP), was applied to maize seedlings grown with different nitrate (NO3−) doses by foliar spraying, aimed at evaluating its effects on maize nitrogen assimilation at both the physiological and molecular level. The results showed that PASP promoted biomass and nitrogen accumulation in maize seedlings, especially under low NO3− doses. Among different NO3− conditions, the most noticeable increase in plant biomass by PASP addition was observed in seedlings grown with 1 mmol L−1 NO3−, which was a little less than the optimum concentration (2 mmol L−1) for plant growth. Furthermore, the total nitrogen accumulation increased greatly with additions of PASP to plants grown under suboptimal NO3− conditions. The promotion of nitrogen assimilation was mostly due to the increase of nitrate reductase (NR) activities. The NR activities in seedlings grown under low NO3− doses (0.5 and 1.0 mmol L−1) were extremely increased by PASP, while the activities of glutamine synthetase (GS), aspartate aminotransferase (AspAT), and alanine aminotransferase (AlaAT) were slightly changed. Moreover, the regulation of PASP on NR activity was most probably due to the promotion of the protein accumulation rather than gene expression. Accumulation of NR protein was similarly affected as NR activity, which was markedly increased by PASP treatment. In conclusion, the present study provides insights into the promotion by PASP of nitrogen assimilation and identifies candidate regulatory enzymatic mechanisms, which warrant further investigation with the use of PASP in promoting nitrogen utilization in crops.

scholarly journals INHERITANCE OF NITRATE REDUCTASE ACTIVITY IN Zea mays L

1969 ◽  
Vol 62 (3) ◽  
pp. 785-792 ◽  
Author(s):  
R. L. Warner ◽  
R. H. Hageman ◽  
J. W. Dudley ◽  
R. J. Lambert
Keyword(s):  
Zea Mays ◽  
Nitrate Reductase ◽  
Nitrate Reductase Activity ◽  
Zea Mays L ◽  
Reductase Activity

scholarly journals Nitrate Reductase Activity in Maize (Zea mays L.) Leaves

1976 ◽  
Vol 58 (4) ◽  
pp. 499-504 ◽  
Author(s):  
Dale L. Shaner ◽  
John S. Boyer
Keyword(s):  
Zea Mays ◽  
Nitrate Reductase ◽  
Nitrate Reductase Activity ◽  
Zea Mays L ◽  
Reductase Activity

scholarly journals Nitrate Reductase Activity in Maize (Zea mays L.) Leaves

1976 ◽  
Vol 58 (4) ◽  
pp. 505-509 ◽  
Author(s):  
Dale L. Shaner ◽  
John S. Boyer
Keyword(s):  
Zea Mays ◽  
Nitrate Reductase ◽  
Nitrate Reductase Activity ◽  
Zea Mays L ◽  
Reductase Activity

scholarly journals Antagonism of chloride and nitrate inhibits nitrate reductase activity in chloride-stressed maize

2021 ◽  
Author(s):  
Xudong Zhang ◽  
Bastian L. Franzisky ◽  
Lars Eigner ◽  
Christoph‐Martin Geilfus ◽  
Christian Zörb
Keyword(s):  
Zea Mays ◽  
Polyethylene Glycol ◽  
Nitrate Reductase ◽  
Osmotic Stress ◽  
Nitrate Reductase Activity ◽  
Reductase Activity ◽  
Shoot Biomass ◽  
Lower Intensity ◽  
Maize Variety ◽  
Osmotic Balance

AbstractChloride (Cl−) is required for photosynthesis and regulates osmotic balance. However, excess Cl− application negatively interacts with nitrate ($${\mathrm{NO}}_{3}^{-}$$ NO 3 - ) uptake, although its effect on $${\mathrm{NO}}_{3}^{-}$$ NO 3 - metabolism remains unclear. The aim was to test whether Cl− stress disturbs nitrate reductase activity (NRA). A maize variety (Zea mays L. cv. LG 30215) was hydroponically cultured in a greenhouse under the following conditions: control (2 mM CaCl2), moderate Cl− (10 mM CaCl2), high Cl− (60 mM CaCl2). To substantiate the effect of Cl− stress further, an osmotic stress with lower intensity was induced by 60 g polyethylene glycol (PEG) 6000 L−1 + 2 mM CaCl2), which was 57% of the osmotic pressure being produced by 60 mM CaCl2. Results show that high Cl− and PEG-induced osmotic stress significantly reduced shoot biomass, stomatal conductance and transpiration rate, but NRA was only decreased by high Cl− stress. The interference of NRA in chloride-stressed maize is supposed to be primarily caused by the antagonistic uptake of Cl− and $${\mathrm{NO}}_{3}^{-}$$ NO 3 - .

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