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- Title
Glutamate Is Involved in Acid Stress Response in Bradyrhizobium sp. SEMIA 6144 ( Arachis hypogaea L.) Microsymbiont.
- Authors
Natera, V.; Sobrevals, L.; Fabra, A.; Castro, S.
- Abstract
In the present study, the effect of acid stress on ammonium assimilation in Bradyrhizobium sp. SEMIA 6144 ( Arachis hypogaea L.) microsymbiont was analyzed. The bacterial growth rate was decreased by 50%, and a significant increase in intracellular glutamate concentration was detected when the strain grew at acid pH (5.5). Assays of the enzymes involved in glutamate synthesis showed increased activities of glutamine synthetase (GS) and glutamate synthase (NADPH-GOGAT) under acid stress condition. This would support the contention that the GS/NADPH-GOGAT pathway contributes to the increase of glutamate synthesis as a compatible solute in response to acid stress.
- Subjects
PEANUTS; EFFECT of acids on plants; PLANT assimilation; BACTERIAL growth; SOIL acidity; ENZYMES; GLUTAMINE synthetase
- Publication
Current Microbiology, 2006, Vol 53, Issue 6, p479
- ISSN
0343-8651
- Publication type
Article
- DOI
10.1007/s00284-006-0146-y