Apr 2, 2009 - Boston and Rick Kesseli for reviewing the manuscript. References. Acinas SG, Marcelino LA, Klepac-Ceraj V, Polz MF. 2004. Divergence and ...
Journal of Experimental Botany, Vol. 60, No. 6, pp. 1729–1742, 2009 doi:10.1093/jxb/erp053 Advance Access publication 2 April, 2009 This paper is available online free of all access charges (see http://jxb.oxfordjournals.org/open_access.html for further details)
RESEARCH PAPER
Influence of Arabidopsis thaliana accessions on rhizobacterial communities and natural variation in root exudates Shirley A. Micallef, Michael P. Shiaris and Ada´n Colo´n-Carmona* Department of Biology, University of Massachusetts Boston, 100 Morrissey Boulevard, Boston, MA 02125, USA Received 9 December 2008; Accepted 3 February 2009
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
