ISSN:
1432-072X
Keywords:
Salt tolerance
;
Rhizobium Sp.
;
K+-Glutamate
;
Ammonia assimilation enzymes
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract Rhizobium Sp. UMKL 20 responded to increased sodium chloride concentration in the medium by elevating the intracellular concentrations of K+ and glutamate. Increases in K+ occurred in a time course synchronous with glutamate. Addition of the uncoupler 2,4-dinitrophenol, significantly reduced K+ uptake but had little effect on glutamate accumulation. New protein synthesis did not appear to be required for the stimulation of K+ uptake by NaCl. Assays of enzymes involved in glutamate synthesis showed that under salt-stress conditions, increased activities of glutamine synthetase and glutamate synthase were detected, indicating that the GS/GOGAT pathway is the major pathway for increasing intracellular glutamate concentration.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00414484
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