Nonnodulating Bradyrhizobium spp. Modulate the Benefits of Legume-Rhizobium Mutualism.

ABSTRACT:

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Rhizobia are best known for nodulating legume roots and fixing atmospheric nitrogen for the host in exchange for photosynthates. However, the majority of the diverse strains of rhizobia do not form nodules on legumes, often because they lack key loci that are needed to induce nodulation. Nonnodulating rhizobia are robust heterotrophs that can persist in bulk soil, thrive in the rhizosphere, or colonize roots as endophytes, but their role in the legume-rhizobium mutualism remains unclear. Here, we investigated the effects of nonnodulating strains on the native Acmispon-Bradyrhizobium mutualism. To examine the effects on both host performance and symbiont fitness, we performed clonal inoculations of diverse nonnodulating Bradyrhizobium strains on Acmispon strigosus hosts a

SUBMITTER: Gano-Cohen KA 

PROVIDER: S-EPMC4988196 | biostudies-literature | 2016 Sep

REPOSITORIES: biostudies-literature