Glutathione produced by Rhizobium tropici is important to prevent early senescence in common bean nodules

In this paper, we examine the importance of glutathione in symbiosis, using a glutathione biosynthetic gshB mutant derived from Rhizobium tropici CIAT899, a common bean (Phaseolus vulgaris) endosymbiont. Plants infected with the mutant strain presented a delayed nodulation phenotype and a reduction...

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Detalles Bibliográficos
Autores principales: Muglia, Cecilia Isabel, Comai, Glenda, Spegazzini, Etile Dolores, Riccillo, Pablo Miguel, Aguilar, Orlando Mario
Formato: Articulo
Lenguaje:Inglés
Publicado: 2008
Materias:
Biología
Bacterial glutathione
Nodule senescence
Oxidative stress
Rhizobia
Symbiosis
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/83516
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-83516
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Biología
Bacterial glutathione
Nodule senescence
Oxidative stress
Rhizobia
Symbiosis
spellingShingle Biología
Bacterial glutathione
Nodule senescence
Oxidative stress
Rhizobia
Symbiosis
Muglia, Cecilia Isabel
Comai, Glenda
Spegazzini, Etile Dolores
Riccillo, Pablo Miguel
Aguilar, Orlando Mario
Glutathione produced by Rhizobium tropici is important to prevent early senescence in common bean nodules
topic_facet Biología
Bacterial glutathione
Nodule senescence
Oxidative stress
Rhizobia
Symbiosis
description In this paper, we examine the importance of glutathione in symbiosis, using a glutathione biosynthetic gshB mutant derived from Rhizobium tropici CIAT899, a common bean (Phaseolus vulgaris) endosymbiont. Plants infected with the mutant strain presented a delayed nodulation phenotype and a reduction in the dry weight of aerial part of plants, suggesting diminished nitrogen-fixation activity. In addition, bacterial gshB expression was assayed in wild-type infected nodules, during the different steps of nodulation, and found to increase in mature and early senescent nodules. Conspicuously, nodules induced by gshB mutant bacteria presented an early senescent pattern, which was associated with increased levels of superoxide accumulation. These results provide a direct evidence of the role of bacterial glutathione in protecting nodules from reactive oxygen species, which may determine nodule senescence.
format Articulo
Articulo
author Muglia, Cecilia Isabel
Comai, Glenda
Spegazzini, Etile Dolores
Riccillo, Pablo Miguel
Aguilar, Orlando Mario
author_facet Muglia, Cecilia Isabel
Comai, Glenda
Spegazzini, Etile Dolores
Riccillo, Pablo Miguel
Aguilar, Orlando Mario
author_sort Muglia, Cecilia Isabel
title Glutathione produced by Rhizobium tropici is important to prevent early senescence in common bean nodules
title_short Glutathione produced by Rhizobium tropici is important to prevent early senescence in common bean nodules
title_full Glutathione produced by Rhizobium tropici is important to prevent early senescence in common bean nodules
title_fullStr Glutathione produced by Rhizobium tropici is important to prevent early senescence in common bean nodules
title_full_unstemmed Glutathione produced by Rhizobium tropici is important to prevent early senescence in common bean nodules
title_sort glutathione produced by rhizobium tropici is important to prevent early senescence in common bean nodules
publishDate 2008
url http://sedici.unlp.edu.ar/handle/10915/83516
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