title: Rhodovastum atsumiense gen. nov., sp. nov., a phototrophic alphaproteobacterium isolated from paddy soil.
abstract: A photoorganotrophic alphaproteobacterium designated strain G2-11(T) was isolated from submerged paddy soil. This bacterium had relatively large, oval to rod-shaped cells (2.0-3.0x3.0-10 microm). Cells were motile by means of single polar flagella. 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. Vesicular intracytoplasmic membranes were present. The main component of cellular fatty acids was C(18:1)omega7c. 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)).
authors.affiliation: Department of Ecological Engineering, Toyohashi University of Technology, Japan.
authors.forename: Keiko
authors.initials: K
authors.lastname: Okamura
authors.forename: Takayoshi
authors.initials: T
authors.lastname: Hisada
authors.forename: Toshio
authors.initials: T
authors.lastname: Kanbe
authors.forename: Akira
authors.initials: A
authors.lastname: Hiraishi
mesh_terms: D016947:Acetobacteraceae / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification / Q000502:physiology; D015373:Bacterial Typing Techniques; D025541:Bacteriochlorophyll A / Q000378:metabolism; D001482:Base Composition; D004269:DNA, Bacterial / Q000032:analysis / Q000235:genetics; D004275:DNA, Ribosomal / Q000032:analysis; D005227:Fatty Acids / Q000032:analysis; D020459:Genes, rRNA; D019015:Geologic Sediments; D007564:Japan; D008969:Molecular Sequence Data; D052817:Phototrophic Processes; D010802:Phylogeny; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D017422:Sequence Analysis, DNA; D012988:Soil Microbiology; D013045:Species Specificity; D024341:Xanthophylls / Q000378:metabolism
chemical_list: D025541:Bacteriochlorophyll A; D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D005227:Fatty Acids; D012336:RNA, Ribosomal, 16S; D024341:Xanthophylls; C055255:spirilloxanthin