scholarly journals Rapid Modulation of Spinach Leaf Nitrate Reductase Activity by Photosynthesis

1991 ◽  
Vol 96 (2) ◽  
pp. 363-367 ◽  
Author(s):  
Werner M. Kaiser ◽  
Elke Brendle-Behnisch
Keyword(s):  
Nitrate Reductase ◽  
Nitrate Reductase Activity ◽  
Reductase Activity ◽  
Spinach Leaf ◽  
Rapid Modulation ◽  
Leaf Nitrate

SEASONAL PATTERNS OF DENITRIFICATION AND LEAF NITRATE REDUCTASE ACTIVITY IN A CORN FIELD

1978 ◽  
Vol 58 (2) ◽  
pp. 283-285 ◽  
Author(s):  
D. G. PATRIQUIN ◽  
J. C. MacKINNON ◽  
K. I. WILKIE
Keyword(s):  
Nitrate Reductase ◽  
Nitrate Reductase Activity ◽  
General Trend ◽  
Reductase Activity ◽  
Seasonal Patterns ◽  
Assay Procedure ◽  
Acetylene Blockage Technique ◽  
Acetylene Blockage ◽  
Leaf Nitrate

Denitrification in soil around the bases of corn stalks, determined by the "acetylene blockage technique," exhibited a general trend of decline from June to September. Leaf nitrate reductase activity, determined by an in vivo assay procedure, was low in June and July, and then exhibited a pronounced maximum at the time of tasselling.

scholarly journals Limitations on Leaf Nitrate Reductase Activity during Flowering and Podfill in Soybean

1986 ◽  
Vol 80 (2) ◽  
pp. 454-458 ◽  
Author(s):  
Beth M. Nelson-Schreiber ◽  
Lee E. Schweitzer
Keyword(s):  
Nitrate Reductase ◽  
Nitrate Reductase Activity ◽  
Reductase Activity ◽  
Leaf Nitrate

Nitrogen Uptake of Field-grown Cotton. II. Nitrate Reductase Activity and Petiole Nitrate Concentration as Indicators of Plant Nitrogen Status

1983 ◽  
Vol 19 (1) ◽  
pp. 103-109 ◽  
Author(s):  
D. M. Oosterhuis ◽  
G. C. Bate
Keyword(s):  
Nitrate Reductase ◽  
Seasonal Changes ◽  
Nitrate Reductase Activity ◽  
Nitrate Concentration ◽  
Reductase Activity ◽  
Soil N ◽  
Plant Nitrogen ◽  
Petiole Nitrate Concentration ◽  
Leaf Nitrate ◽  
N Status

SUMMARYThe possibility of using seasonal changes in leaf nitrate reductase activity (NRA) as a reliable and sensitive indicator of plant nitrogen (N) status has been investigated in field-grown cotton. These changes were compared with those in nitrate concentration in petioles and variations in soil-N concentration. We conclude that NRA in the uppermost, fully-expanded sympodial leaves may provide a more convenient, sensitive and reliable indicator of plant-N status than measurements of nitrate concentrations in petioles.

scholarly journals GROWTH, DEVELOPMENT AND NITROGEN METABOLISM OF HYDROPONIC LETTUCE GROWN UNDER HPS SUPPLEMENTAL LIGHTING

HortScience ◽  
1990 ◽  
Vol 25 (9) ◽  
pp. 1152b-1152
Author(s):  
Linda Gaudreau ◽  
Josée Charbonneau ◽  
Louis-P. Vézina ◽  
André Gosselin
Keyword(s):  
High Pressure ◽  
Nitrate Reductase ◽  
Nitrate Reductase Activity ◽  
Reductase Activity ◽  
Natural Light ◽  
Fresh Weight ◽  
Growth Development ◽  
Supplemental Lighting ◽  
Leaf Nitrate

Two cultivars (Karlo and Rosanna) of greenhouse lettuce were grown under different photosynthetic photon fluxes (PPF) and photoperiods provided by 400-W high–pressure sodium lamps. Natural light was compared to suppletmental lighting treatments providing either 50 or 100 μmol m-2-s-1 for photoperiods of 16, 20 or 24 h. Lettuce plants were grown in hydroponic gulleys using a standard nutrient solution. Plant fresh weights were measured every week for the duration of each culture grown between August 1989 and June 1990. The incidence of tipburn and the overall quality of the shoots were determined at the end of each crop. Leaf nitrate contents and nitrate reductase activity were measured for various lighting treatments. The highest fresh weight was obtained for the highest PPF and the longest photoperiod. However, these treatments were associated with a higher incidence of tipburn. Supplemental lighting reduced the leaf nitrate contents and affected the nitrate reductase activity.

Changes in Leaf Nitrate Reductase Activity In Vivo and In Vitro During Light-Dark Transitions

1999 ◽  
Vol 8 (1) ◽  
pp. 37-40 ◽  
Author(s):  
B. K. Salalkar ◽  
R. S. Shaikh ◽  
R. M. Naik ◽  
S. V. Munjal ◽  
B. B. Desai ◽  
...  
Keyword(s):  
Nitrate Reductase ◽  
Nitrate Reductase Activity ◽  
Reductase Activity ◽  
Leaf Nitrate

scholarly journals Rapid Modulation of Spinach Leaf Nitrate Reductase by Photosynthesis

1991 ◽  
Vol 96 (2) ◽  
pp. 368-375 ◽  
Author(s):  
Werner M. Kaiser ◽  
Dirk Spill
Keyword(s):  
Nitrate Reductase ◽  
Spinach Leaf ◽  
Rapid Modulation ◽  
Leaf Nitrate
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