EFFECTS OF BLUE LIGHT SUPPLEMENTATION TO RED LIGHT ON NITRATE REDUCTASE ACTIVITY IN LEAVES OF RICE SEEDLINGS

2006 ◽  
pp. 351-356 ◽  
Author(s):  
K.K. Ohashi ◽  
K. Goji ◽  
R. Matsuda ◽  
K. Fujiwara ◽  
K. Kurata
Keyword(s):  
Nitrate Reductase ◽  
Blue Light ◽  
Nitrate Reductase Activity ◽  
Reductase Activity ◽  
Red Light ◽  
Rice Seedlings

Blue-light-enhanced nitrate reductase activity in etiolated pea terminal buds

1974 ◽  
Vol 52 (6) ◽  
pp. 1433-1435 ◽  
Author(s):  
R. W. Jones ◽  
R. W. Sheard
Keyword(s):  
Nitrate Reductase ◽  
Blue Light ◽  
Nitrate Reductase Activity ◽  
Reductase Activity ◽  
High Energy ◽  
Light Requirement ◽  
High Energy Reaction ◽  
Terminal Buds ◽  
Energy Reaction

Under conditions in which the light requirement for phytochrome mediation was inferred to be above saturation, white and blue lights enhanced the extractable nitrate reductase activity of etiolated pea terminal buds above the levels engendered by red and far-red lights. The regulation of nitrate reductase by light in the terminal buds appears to involve both phytochrome and a blue-sensitive high-energy reaction.

Phytochrome enhances nitrate reductase activity in the lichen Evernia prunastri

1985 ◽  
Vol 63 (8) ◽  
pp. 1350-1354 ◽  
Author(s):  
A. Avalos ◽  
C. Vicente
Keyword(s):  
Enzyme Activity ◽  
Nitrate Reductase ◽  
Nitrate Reductase Activity ◽  
Reductase Activity ◽  
Red Light ◽  
Evernia Prunastri ◽  
Fungal Enzyme

The lichen Evernia prunastri shortly after collection shows low nitrate reductase activity. The enzyme is induced by nitrate in the dark and this effect is enhanced by red light, the action of which is reversed by far-red light. Nitrate reductase is located in both symbionts, but mycobiont cells are responsible for the increase of enzyme activity in whole thalli floated on nitrate in the dark. When this increase is achieved in the light, it can be related to the Pfr content of the photobiont cells, whereas changes in the activity of the fungal enzyme are negligible.

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