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Artículo

Antioxidant defense system responses and role of nitrate reductase in the redox balance maintenance in Bradyrhizobium japonicum strains exposed to cadmium

Bianucci, Eliana CarolinaIcon ; Fullana, Cynthia; Furlan, Ana LauraIcon ; Castro, Stella Maris
Fecha de publicación: 10/2013
Editorial: Elsevier Science Inc.
Revista: Enzyme and Microbial Technology
ISSN: 0141-0229
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Biología Celular, Microbiología

Resumen

In this work, we evaluated the effects of cadmium (Cd) on the antioxidant defense system responses and the role of nitrate reductase (NR) in the redox balance maintenance in Bradyrhizobium japonicum strains. For that, B. japonicum USDA110 and its NR defective mutant strain (GRPA1) were used. Results showed that the addition of 10. μM Cd did not modify the aerobic growth of the wild type strain while the mutant strain was strongly affected. Anaerobic growth revealed that only the parental strain was able to grow under this condition. Cd reduced drastically the NR activity in B. japonicum USDA110 and increased lipid peroxide content in both strains. Cd decreased reduced glutathione (GSH)/oxidized glutathione (GSSG) ratio in B. japonicum USDA110 although, a significant increased was observed in the mutant GRPA1. GSH-related enzymes were induced by Cd, being more evident the increase in the mutant strain. This different behavior observed between strains suggests that NR enzyme plays an important role in the redox balance maintenance in B. japonicum USDA 110 exposed to Cd.
Palabras clave: BRADYRHIZOBIUM JAPONICUM , CADMIUM , GLUTATHIONE , NITRATE REDUCTASE
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/180631
DOI: https://www.sciencedirect.com/science/article/abs/pii/S0141022913001592
DOI: http://dx.doi.org/10.1016/j.enzmictec.2013.07.007
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Articulos(CCT - CORDOBA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - CORDOBA
Citación
Bianucci, Eliana Carolina; Fullana, Cynthia; Furlan, Ana Laura; Castro, Stella Maris; Antioxidant defense system responses and role of nitrate reductase in the redox balance maintenance in Bradyrhizobium japonicum strains exposed to cadmium; Elsevier Science Inc.; Enzyme and Microbial Technology; 53; 5; 10-2013; 345-350
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