Journal
FEMS MICROBIOLOGY LETTERS
Volume 266, Issue 2, Pages 231-235Publisher
OXFORD UNIV PRESS
DOI: 10.1111/j.1574-6968.2006.00530.x
Keywords
Burkholderia cepacia complex; diversity; distribution; rhizosphere; rice; maize
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A survey of Burkholderia cepacia complex (Bcc) species was conducted in agricultural fields within Hangzhou, China. Out of the 251 bacterial isolates recovered on the selective media from the rhizosphere of rice and maize, 112 of them were assigned to Bcc by PCR assays. The species composition of the Bcc isolates was analyzed by a combination of recA-restriction fragment length polymorphism assays, species-specific PCR tests and recA gene sequencing. The results revealed that the majority belong to B. cepacia, Burkholderia cenocepacia recA lineage IIIB, Burkholderia vietnamiensis and Burkholderia pyrrocinia. Burkholderia cenocepacia and B. vietnamiensis dominated the rhizosphere of maize and rice, respectively, indicating that species composition and abundance of Bcc may vary dramatically in different crop rhizospheres. In addition, one isolate (R456) formed a single discrete cluster within the phylogenetic analysis of the Bcc recA gene, and it may belong to a new genomovar.
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