Semiaerobic induction of a nitrate reductase activity in growing cultures of Rhodopseudomonas capsulata E1F1 containing NH 4 + ions as nitrogen source

1982 ◽  
Vol 132 (3) ◽  
pp. 294-296 ◽  
Author(s):  
Norma L. Kerber ◽  
Ariadna Ciai ◽  
Augusto Fernando Garc�a
Keyword(s):  
Nitrate Reductase ◽  
Nitrogen Source ◽  
Nitrate Reductase Activity ◽  
Reductase Activity ◽  
Rhodopseudomonas Capsulata

Nitrate reductase activity and nitrogen compounds in xylem exudate of Juglans nigra seedlings: relation to nitrogen source and supply

Trees ◽  
2008 ◽  
Vol 22 (5) ◽  
pp. 685-695 ◽  
Author(s):  
Michael A. Nicodemus ◽  
K. Francis Salifu ◽  
Douglass F. Jacobs
Keyword(s):  
Nitrate Reductase ◽  
Nitrogen Source ◽  
Nitrate Reductase Activity ◽  
Reductase Activity ◽  
Juglans Nigra ◽  
Nitrogen Compounds ◽  
Xylem Exudate

Nitrate reductase activity and growth in Paul's Scarlet rose suspension cultures in relation to nitrogen source and molybdenum

Planta ◽  
1976 ◽  
Vol 133 (1) ◽  
pp. 27-34 ◽  
Author(s):  
R. W. Jones ◽  
A. J. Abbott ◽  
E. J. Hewitt ◽  
D. M. James ◽  
G. R. Best
Keyword(s):  
Nitrate Reductase ◽  
Nitrogen Source ◽  
Nitrate Reductase Activity ◽  
Reductase Activity ◽  
Suspension Cultures

Induction of Nitrate Reductase Activity by Arginine in the Filamentous Cyanobacterium Oscillatoria chalybea

1991 ◽  
Vol 46 (7-8) ◽  
pp. 591-596 ◽  
Author(s):  
J. Bednarz ◽  
G. H. Schmid
Keyword(s):  
Nitrate Reductase ◽  
Nitrogen Source ◽  
Nitrate Reduction ◽  
Nitrate Reductase Activity ◽  
Reductase Activity ◽  
Maximal Activity ◽  
Substrate Affinity ◽  
Filamentous Cyanobacterium ◽  
Oscillatoria Chalybea ◽  
Exogenous Nitrogen

Abstract In Oscillatoria chalybea, as in other cyanobacteria, nitrate reduction depends directly on photosynthetic activity. Hence, nitrate reduction occurs only in the light and appears inhibited when photosynthesis is inhibited by the herbicide DCMU . Growth of Oscillatoria cells is possible on a variety of exogenous nitrogen sources in the medium and appears largely independent on the type of nitrogen source. However, if citrulline is the exogenous nitrogen source or if no exogenous nitrogen source is given in the medium, growth appears almost fully inhibited. Nitrate reductase activity measured in French-press particles of nitrate-grown cells is depend­ent on the age of the culture with maximum nitrate reductase activity being reached on the 5th day. Thereafter activity decreases steeply to less than 20% of the maximal activity within 10 days. Besides the growth stage it is the type of exogenous nitrogen source used in the medium which is important for the development of nitrate reductase activity. It appears that in the presence of nitrate, nitrite and arginine, nitrate reductase activity is induced whereas in the presence of ammonia or amino acids like alanine nitrate reductase activity is not induced, as already reported in the literature. Nitrate reductase is also induced if arginine and ammonia are simultaneously offered as exogenous nitrogen source. Arginine metabolism in Oscillatoria cells is characterized by the fact that thylakoid preparations of Oscillatoria catalyze the trans­ formation of arginine to give ornithine and ammonium. The arginine-metabolizing enzyme differs from the usual arginine-induced arginase. The enzyme seems to be constitutive, not manganese-dependent, exhibiting an approximately 5 times higher substrate affinity to arginine than the known arginase. In the present paper we propose that in Oscillatoria it is arginine which induces the synthesis of nitrate reductase.

Presence of high levels of nitrate reductase activity in Cyanidium caldarium grown on glutamate as the sole nitrogen source

1974 ◽  
Vol 2 (5) ◽  
pp. 277-281 ◽  
Author(s):  
Carmelo Rigano ◽  
Giovanni Aliotta ◽  
Umberto Violante
Keyword(s):  
Nitrate Reductase ◽  
Nitrogen Source ◽  
Nitrate Reductase Activity ◽  
Reductase Activity ◽  
Sole Nitrogen Source ◽  
Cyanidium Caldarium

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

Nitrate Reductase Activity in Heat (Drought) Tolerant and Intolerant Maize Genotypes 1

Crop Science ◽  
1976 ◽  
Vol 16 (6) ◽  
pp. 775-779 ◽  
Author(s):  
U. R. Pal ◽  
R. R. Johnson ◽  
R. H. Hageman
Keyword(s):  
Nitrate Reductase ◽  
Nitrate Reductase Activity ◽  
Reductase Activity ◽  
Drought Tolerant ◽  
Maize Genotypes

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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