Results 271 to 280 of about 1,069,262 (320)

Biochar leachate reduces primary nitrogen assimilation by inhibiting nitrogen fixation and microbial nitrate assimilation

Science of the Total Environment
Biochar contains biotoxic aromatic compounds, and their influence on nitrogen-fixing cyanobacteria, the critical nitrogen fixer in paddy soil, has never been tested. Here, the physiological, metabolomic, and transcriptomic analyses of Nostoc sp. PCC7120 in response to biochar leachate were performed.
Xiaomeng Wei, Yuexi Jiang
exaly   +3 more sources

Nitrogen assimilation and nitrogen control in cyanobacteria

Biochemical Society Transactions, 2005
Nitrogen sources commonly used by cyanobacteria include ammonium, nitrate, nitrite, urea and atmospheric N2, and some cyanobacteria can also assimilate arginine or glutamine. ABC (ATP-binding cassette)-type permeases are involved in the uptake of nitrate/nitrite, urea and most amino acids, whereas secondary transporters take up ammonium and, in some ...
E, Flores, A, Herrero
openaire   +2 more sources

Nitrogen assimilation in Rhodopseudomonas acidophila

Archives of Microbiology, 1978
Rhodopseudomonas acidophila strain 7050 assimilated ammonia via a constitutive glutamine synthetase/glutamate synthase enzyme system. Glutamine synthetase had a Km for NH+4 of 0.38 mM whilst the nicotinamide adenine dinucleotide linked glutamate synthase had a Km for glutamine of 0.55 mM. R.
R A, Herbert, E, Siefert, N, Pfennig
openaire   +2 more sources

The mechanisms of nitrogen assimilation in Pseudomonads

Antonie van Leeuwenhoek, 1973
Pseudomonas aeruginosa, Ps. fluorescens and 3 marine psychrophylic pseudomonads were grown in chemostat cultures with nitrate ammonia or glutamate as nitrogen source. In cultures grown on nitrate (either carbon- or nitrogen-limited) and in ammonia nitrogen-limited cultures ammonia was assimilated via the GS/GOGAT pathway.
C M, Brown, D S, Macdonald-Brown, S O, Stanley   +2 more
openaire   +2 more sources

Uptake and assimilation of nitrogen by marine diatoms—II. Kinetics of nitrogen assimilation

Proceedings / Indian Academy of Sciences, 1988
A comparison ofK M values for nitrate and nitrite reductases with uptake capacities of 6 marine diatoms indicated that intracellular accumulation of NO 3 − and NO 2 − is necessary for ...
V Sivasubramanian, V N R Rao
openaire   +1 more source

Regulation of the Assimilation of Nitrogen Compounds

Annual Review of Biochemistry, 1978
FORMATION OF GLUTAMATE AND GLUTAMINE FROM AMMONIA .... 1131 The Role oj Glutamate Dehydrogenase (GDH) 1131 Biochemistry oj GDH 1131 Physiology oj GDH production ....... .... 1131 Genetics oj GDH jormation .. 1131 The Role o/Glutamate Synthase (GOGAT) 1132 Biochemistry oj GaGA T 1132 Physiology of GOGAT production 1133 Genetics ...
openaire   +2 more sources

Nitrogen Assimilation and Dissimilation

2021
Nitrogen is an important element of Earth’s atmosphere and exists in both inorganic and organic forms. In nature, one form is to another through various biological and physical processes. The major steps involved in the cycling of nitrogen are nitrogen fixation, ammonification, nitrification, denitrification and anammox catalyzed by variety of microbes.
Rani Gupta, Namita Gupta
openaire   +1 more source

Nitrogen Assimilation in Grapevine

2001
Nitrogen plays the most important role of all nutrients in plant growth. It is the plant nutrient most likely to be deficient in grapevine although it is the nutrient most commonly applied to vineyards to increase productivity. Considerable new information has been obtained over the past twenty years on the uptake, translocation, distribution ...
K. A. Loulakakis, K. A. Roubelakis-Angelakis   +1 more
openaire   +1 more source

Assimilation of biological nitrogen by European beaver

Biology Bulletin, 2009
Nitrogenase activity, the abundance of diazotrophic bacteria, the structure and functional characteristics of the complex of microorganisms, and the content of nitrogen and carbon were determined in the contents of the gastrointestinal tract of the European beaver.
M V, Vecherskiĭ, E I, Naumova, N V, Kostina, M M, Umarov   +3 more
openaire   +2 more sources

Enzymes of nitrogen assimilation in maize roots

Planta, 1980
The enzymes nitrate reductase (NR), glutamate dehydrogenase (GDH), glutamate synthase (GOGAT), glutamine synthetase (GS) and asparagine synthetase (AS) have been assayed in various regions along the seedling root ofZea mays L. In the intact attached root and calculated on a protein basis NR, GOGAT, and GS are found to have slightly higher specific ...
A, Oaks, I, Stulen, K, Jones, M J, Winspear, S, Misra, I L, Boesel   +5 more
openaire   +2 more sources