Artículo
A mechanistic molecular test of the plant-sanction hypothesis in legume–rhizobia mutualism
Marco, Diana Elizabeth
; Pérez Arnedo, Rebeca; Hidalgo Perea, Ángeles; Olivares, José; Ruiz Sainz, José E.; Sanjuán, Juan
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Fecha de publicación:
07/2009
Editorial:
Gauthier-Villars/Editions Elsevier
Revista:
Acta Oecologica
ISSN:
1146-609X
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The origin and persistence of mutualism is difficult to explain because of the widespread occurrence of exploitative, ‘cheating’ partners. As a policing strategy stabilising intraspecific cooperation, host sanctions against non-N2 fixing, cheating symbionts have been proposed to stabilise mutualism in legumerhizobium symbiosis. Mechanism of penalisations would include decreased nodular rhizobial viability and/or early nodule senescence. We tested these potential mechanisms of penalisations in split-root experiments using two soybean varieties and two rhizobial strains, a cooperative, normal N2-fixing strain and an isogenic non-fixing derivative. We found no differences in the number of viable rhizobia recovered from nodules and no differential expression of a nodular senescence molecular marker. Thus, our results do not support the hypothesis of plant sanctions acting against cheating rhizobia in our experimental conditions.
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Articulos(CCT - CORDOBA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - CORDOBA
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - CORDOBA
Citación
Marco, Diana Elizabeth; Pérez Arnedo, Rebeca; Hidalgo Perea, Ángeles; Olivares, José; Ruiz Sainz, José E.; et al.; A mechanistic molecular test of the plant-sanction hypothesis in legume–rhizobia mutualism; Gauthier-Villars/Editions Elsevier; Acta Oecologica; 35; 5; 7-2009; 664-667
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