Nodulation and Delayed Nodule Senescence: Strategies of Two Bradyrhizobium Japonicum Isolates with High Capacity to Fix Nitrogen

cic.lugarDesarrolloCentro de Investigaciones de Fitopatología es
dc.titleNodulation and Delayed Nodule Senescence: Strategies of Two Bradyrhizobium Japonicum Isolates with High Capacity to Fix Nitrogenen
dcterms.abstractThe purpose of this work was to study further two Bradyrhizobium japonicum strains with high nitrogen-fixing capacity that were identified within a collection of approximately 200 isolates from the soils of Argentina. Nodulation and nitrogen-fixing capacity and the level of expression of regulatory as well as structural genes of nitrogen fixation and the 1-aminocyclopropane-1-carboxylate (ACC) deaminase gene of the isolates were compared with that of E109-inoculated plants. Both isolates of B. japonicum, 163 and 366, were highly efficient to fix nitrogen compared to commercial strain E109. Isolate 366 developed a higher number and larger biomass of nodules and because of this fixed more nitrogen. Isolate 163 developed the same number and nodule biomass than E109. However, nodules developed by isolate 163 had red interiors for a longer period, had a higher leghemoglobin content, and presented high levels of expression of acdS gene, that codes for an ACC deaminase. In conclusion, naturalized rhizobia of the soils of Argentina hold a diverse population that might be the source of highly active nitrogen-fixing rhizobia, a process that appears to be based on different strategies.en
dcterms.creator.authorLópez, Silvina Marianela Yaniles
dcterms.creator.authorMolina Sanchez, Doloreses
dcterms.creator.authorPastorino, Graciela
dcterms.creator.authorFranco, Mario Emilio Ernestoes
dcterms.creator.authorToro Garcia, Nicolases
dcterms.creator.authorBalatti, Pedro Albertoes
dcterms.identifier.urlRecurso Completoes
dcterms.isPartOf.seriesCurrent Microbiologyes
dcterms.licenseAttribution-NonCommercial-NoDerivatives 4.0 International (BY-NC-ND 4.0)es
dcterms.subjectBradyrhizobium japonicumen
dcterms.subjectNodule senescenceen
dcterms.subjectNitrogen fixationen
dcterms.subject.materiaAgronomía, reproducción y protección de plantases
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