Rhodovastum atsumiense gen. nov., sp. nov., a phototrophic alphaproteobacterium isolated from paddy soil

Keiko Okamura, Takayoshi Hisada, Toshio Kanbe, Akira Hiraishi
2009 Journal of General and Applied Microbiology  
A photoorganotrophic alphaproteobacterium designated strain G2-11 T was isolated from submerged paddy soil. This bacterium had relatively large, oval to rod-shaped cells (2.0 3.0×3.0 10 μm). Cells were motile by means of single polar fl agella. The color of phototrophically growing cultures was reddish-brown. The cell extract had absorption maxima at 375, 465, 492, 529, 592, 804, and 844 nm, indicating the presence of bacteriochlorophyll a and carotenoides of the spirilloxanthin series.
more » ... hin series. Vesicular intracytoplasmic membranes were present. The main component of cellular fatty acids was C 18:1 ω7c. Ubiquinone-10 and rhodoquinone-10 were the major quinones. A 16S rRNA gene sequence analysis revealed that the isolate is closest to the acidophilic aerobic photosynthetic bacterium Acidisphaera rubrifaciens strain HS-AP3 T (93.3% similarity). The G+C content of genomic DNA is 67.8 mol%. The name Rhodovastum atsumiense gen. nov., sp. nov. is proposed for the novel isolate. The type strain is strain G2-11 T (=NBRC 104268 T =KCTC 5708 T ).
doi:10.2323/jgam.55.43 pmid:19282632 fatcat:y5fnrcpmerfhlg6dj3gl4q35dm