期刊
JOURNAL OF GENERAL AND APPLIED MICROBIOLOGY
卷 50, 期 1, 页码 17-28出版社
MICROBIOL RES FOUNDATION
DOI: 10.2323/jgam.50.17
关键词
Acacia mangium; Bradyrhizobium; determinate nodule; nitrogen fixation; nodule bacteria; Ochrobactrum; Rhizobium; 16S rRNA
Ten strains of root nodule bacteria were isolated from the nodules of Acacia mangium grown in the Philippines and Thailand. Partial sequences (approx. 300 bp) of the 16 SrRNA gene of each isolate were analyzed. The nucleotide sequences of strain DASA 35030 indicated high homology (>99%) with members of the genus Ochrobactrum in Brucellaceae, although the sequences of other isolates were homologous to those of two distinct genera Bradyrhizobium and Rhizobium. The strain DASA 35030 was strongly suggested to be a strain of Ochrobactrum by full length sequences of the 16 SrRNA gene, fatty acids composition, G+C contents of the DNA, and other physiological characteristics. Strain DASA 35030 induced root nodules on A. mangium, A. albida and Paraserianthes falcataria. The nodules formed by strain DASA 35030 fixed nitrogen and the morphology of the nodules is the same as those of nodules formed by the other isolates. This is the first report that the strain of Ochrobactrum possesses complete symbiotic ability with Acacia.
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