Effect of mycorrhiza and nitrate nutrition on nitrate reductase activity in Scots pine seedlings

1991 ◽  
Vol 81 (1) ◽  
pp. 89-94 ◽  
Author(s):  
Tytti Sarjala
Keyword(s):  
Nitrate Reductase ◽  
Scots Pine ◽  
Nitrate Reductase Activity ◽  
Reductase Activity ◽  
Pine Seedlings

Ecophysiological responses of Araucaria angustifolia seedlings to different irradiance levels.

2000 ◽  
Vol 48 (4) ◽  
pp. 531 ◽  
Author(s):  
Leandro da S. Duarte ◽  
Lúcia R. Dillenburg
Keyword(s):  
Nitrate Reductase ◽  
Nitrate Reductase Activity ◽  
Growth Parameters ◽  
Reductase Activity ◽  
Chlorophyll Concentration ◽  
Shoot Biomass ◽  
Araucaria Angustifolia ◽  
Low Light ◽  
Pine Seedlings ◽  
Ecophysiological Responses

Brazilian pine (Araucaria angustifolia [Bert.] O.Ktze.) is an indigenous conifer of the southern region of South America, typically regarded as a sun-loving species. However, there is insufficient information on the species’ behaviour under different irradiances to characterise its plasticity to light. The purpose of this work was to measure some ecophysiological responses of Brazilian pine seedlings to three irradiance levels: 100, 45 and 10% full sunlight. Thirty seedlings were grown under each of the irradiance treatments and, after 5 months, growth parameters, leaf chlorophyll concentration and in vivo nitrate reductase activity, in both leaves and roots, were analysed. There was no increase in shoot biomass allocation in response to shading, in contrast to results from other experiments. Only low-light seedlings showed significant increase in specific leaf area, as well as in the ratio of height to shoot biomass. Chlorophyll content and the ratio of chlorophyll a to chlorophyll b did not vary among treatments. Nitrate reductase activity was detected only in roots and was reduced in the low-light treatment. An overall analysis of the results points to a normal growth of Brazilian pine seedlings at both high- and medium-light sites, at least in their initial stages of development.

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

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 - .

Development and nitrate reductase activity of sugarcane inoculated with five diazotrophic strains

2017 ◽  
Vol 199 (6) ◽  
pp. 863-873 ◽  
Author(s):  
Silvana Gomes dos Santos ◽  
Flaviane da Silva Ribeiro ◽  
Camila Sousa da Fonseca ◽  
Willian Pereira ◽  
Leandro Azevedo Santos ◽  
...  
Keyword(s):  
Nitrate Reductase ◽  
Nitrate Reductase Activity ◽  
Reductase Activity
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