Regulation of nitrogen metabolism in salt tolerant and salt sensitive Frankia strains.
Indian J Exp Biol
;
2014 Apr; 52(4): 352-358
Artículo
en Inglés
| IMSEAR
| ID: sea-150366
ABSTRACT
Effect of salinity (0, 50, 100, 250, 500 and 750 mM NaCl) was observed on some important physiological parameters of nitrogen metabolism such as nitrate uptake, intracellular and extracellular ammonium status and activities of nitrogenase, nitrate reductase, nitrite reductase and glutamine synthetase among Frankia strains differing in their salt tolerance capacity. Nitrogenase activity closely followed the growth pattern with regular decline on NaCl supplementation. All the other enzymes showed optimum activity at 100 mM and declined further. Co-regulation of the nitrate uptake system and sequential enzyme activities plays a crucial role in governing the nitrogen status of strains during salt stress. HsIi10 experiencing minimum decline in enzyme activities and best possible nitrogen regulation under NaCl replete condition showed adequate nutritional management. Among all the strains, HsIi10 proved to be salt tolerant on account of above features while the salt sensitive strain HsIi8 lacked the ability to regulate various steps of nitrogen metabolism during salinity, and thus Frankia strain HsIi10 can potentially serve as a potential biofertilizer in the saline soil.
Texto completo:
Disponible
Índice:
IMSEAR (Asia Sudoriental)
Asunto principal:
Cloruro de Sodio
/
Frankia
/
Salinidad
/
Tolerancia a la Sal
/
Glutamato-Amoníaco Ligasa
/
Amoníaco
/
Nitratos
/
Nitrógeno
/
Nitrogenasa
Tipo de estudio:
Estudio diagnóstico
Idioma:
Inglés
Revista:
Indian J Exp Biol
Año:
2014
Tipo del documento:
Artículo
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