FIG. 1.

Molecular phylogenetic analysis of the Rickettsia symbiont from A. pisum strain OY. (A) Neighbor-joining tree on the basis of 16S rRNA gene sequences. A total of 1,417 unambiguously aligned nucleotide sites were subjected to the analysis. (B) Neighbor-joining tree on the basis of gltA gene sequences. A total of 353 unambiguously aligned nucleotide sites were subjected to the analysis. The percent bootstrap values are shown at the nodes, although values less than 70% are not indicated. The numbers in brackets are accession numbers. Three major groups in the genus Rickettsia, “spotted fever group,” “typhus group,” and “bellii group,” are indicated on the right side.