Regulation by ammonia of nitrate reductase synthesis and activity in

Herrera, J.; Paneque, A.; Maldonado, J. M.; Barea, J.; Losada, M.

doi:10.1016/0006-291x(72)90707-3

Cited by 84 publications

(17 citation statements)

References 5 publications

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“…Opposite redox control of enzyme activity has been reported for nitrate reductase of photosynthetic Chlamydomonas [4] and Chlorella [5]. In these ammonia represses the activity and the inactivation presumably due to a raising of the cellular level of reducing power, which in turn causes the reduction of the enzyme.…”

Section: Discussionmentioning

confidence: 99%

Oxidation in vivo of the −SH groups of Streptomyces violaceoruber fructokinase

Sabater

1973

FEBS Letters

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Section: Discussionmentioning

confidence: 99%

Oxidation in vivo of the −SH groups of Streptomyces violaceoruber fructokinase

Sabater

1973

FEBS Letters

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“…At that time, evidence that some reversible inactivating mechanism was also operative in vivo were reported by Herrera et al (12). To reversibly inactivate NR in vitro, both the absence of N03 and reducing conditions were absolutely required.…”

mentioning

confidence: 82%

Characterization of the Reversible Inactivation of Ankistrodesmus braunii Nitrate Reductase by Hydroxylamine

Balandin

Fernández²,

Aparicio³

1986

Plant Physiol.

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“…The effect of the nitrogen source on the cellular activity level of assimilatory nitrate reductase in the cyanobacteria Anabaena variabilis (ATCC29413) and Synechocystis sp. (PCC6714) has been examined [9]. Among soil properties of paddy field, pH is a very important factor in growth, establishment and diversity of cyanobacteria which have generally been reported to prefer neutral to slightly alkaline pH for optimum growth [14].…”

Section: Introductionmentioning

confidence: 99%

Effect of cultural conditions on biomass and nitrate reductase activity in six strains of anabaena isolated from paddy field soils of Ganjam (Orissa)

SB¹,

Baidya²,

Beja³

et al. 2010

Int J of Micr Res

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Abstract-Cyanobacteria offer an economically and ecologically sound alternative to chemical fertilizers for realizing the ultimate goal of increased productivity, especially in rice cultivation. There is however, a growing concern about the adverse effects of indiscriminate use of chemical fertilizers on soil productivity and environmental quality. A comparative study between the NR activity and biomass of six Anabaena strains isolated from paddy field soils of Ganjam district in presence of pH, temperature, copper& molybdenum, NaNO3, NH4Cl, and Urea is being conducted to present a situation where NR activity and biomass may be affected under varied concentration. Maximum NR activity was observed in Anabaena sp. at pH 8.5 and 35 o C temperature while Anabaena circinalis showed minimum activity in same concentration. Biomass content was maximum in Anabaena variabilis at pH 8.5 where as at temperature 35 o C in Anabaena flos-aquae and minimum biomass observed in Anabaena iyengarii at same concentration. NR activity in relation to copper was maximum in Anabaena sp. at 2 g/l while minimum in Anabaena circinalis at same concentration. At 0.5µg/l molybdenum content in the culture medium showed maximum NR activity in Anabaena sp and reduced in all strains with increase of concentration. Anabaena flos-aquae showed minimum NR activity at 0.1mM concentration of NaNO3 while Anabaena circinalis showed minimum NR activity at same concentration of NH4Cl. The NR activity was observed minimum at 3mM concentration of Urea in A. cylindrica. The activity of NR and biomass in all the strains was influenced by external NH4 -and NO3 + and Urea concentration.

show abstract

Regulation by ammonia of nitrate reductase synthesis and activity in

Cited by 84 publications

References 5 publications

Oxidation in vivo of the −SH groups of Streptomyces violaceoruber fructokinase

Oxidation in vivo of the −SH groups of Streptomyces violaceoruber fructokinase

Characterization of the Reversible Inactivation of Ankistrodesmus braunii Nitrate Reductase by Hydroxylamine

Effect of cultural conditions on biomass and nitrate reductase activity in six strains of anabaena isolated from paddy field soils of Ganjam (Orissa)

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