Influence of Arabidopsis thaliana accessions on rhizobacterial communities and natural variation in root exudates.

ABSTRACT: Plant species is considered to be one of the most important factors in shaping rhizobacterial communities, but specific plant-microbe interactions in the rhizosphere are still not fully understood. Arabidopsis thaliana, for which a large number of naturally occurring ecotype accessions exist, lacks mycorrhizal associations and is hence an ideal model for rhizobacterial studies. Eight Arabidopsis accessions were found to exert a marked selective influence on bacteria associated with their roots, as determined by terminal-restriction fragment length polymorphism (T-RFLP) and ribosomal intergenic spacer analysis (RISA). Community differences in species composition and relative abundance were both significant (P <0.001). The eight distinct and reproducible accession-dependent community profile

SUBMITTER: Micallef SA 

PROVIDER: S-EPMC2671628 | biostudies-literature | 2009

REPOSITORIES: biostudies-literature