Saccharospirillum salsuginis sp. nov., a gammaproteobacterium from a subterranean brine.
A novel Gram-negative, non-sporulating, moderately halophilic, facultatively alkaliphilic, catalase- and oxidase-positive, obligately aerobic bacterium, strain YIM-Y25(T), was isolated from a subterranean brine sample collected from a salt mine in Yunnan, south-west China. Cells were spirilla, motile by monopolar flagella, with meso-diaminopimelic acid in the cell-wall peptidoglycan. Growth occurred with 1-15 % (w/v) NaCl (optimum 5 %), at pH 6.0-10.0 (optimum pH 8.0) and at 15-50 degrees C (optimum 35-40 degrees C). Ubiquinone Q-8 was the predominant respiratory quinone. Polar lipids were diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylglycerol, phosphatidylmonomethylamine and an unidentified phospholipid. The major cellular fatty acids were C(18 : 1)omega7c, iso-C(16 : 0), C(16 : 0) and C(16 : 1). The genomic DNA G+C content was 58.5 mol%. Phylogenetic analysis based on 16S rRNA gene sequences showed that strain YIM-Y25(T) was most closely related to the type strain of the sole recognized species of the genus Saccharospirillum, Saccharospirillum impatiens EL-105(T) (sequence similarity 97.0 %), and these two strains formed a robust lineage in the phylogenetic tree. The level of DNA-DNA relatedness between them was 12.6 %. The combination of phylogenetic analysis, phenotypic differences, chemotaxonomic properties and DNA-DNA hybridization data supported the view that this strain represents a novel species of the genus Saccharospirillum, for which the name Saccharospirillum salsuginis sp. nov. is proposed, with YIM-Y25(T) (=CCTCC AA 207033(T) =KCTC 22169(T)) as the type strain.
Chen
Yi-Guang
YG
Yunnan Institute of Microbiology, Yunnan University, Kunming, Yunnan 650091, PR China.
Cui
Xiao-Long
XL
Li
Qin-Yuan
QY
Wang
Yong-Xia
YX
Tang
Shu-Kun
SK
Liu
Zhu-Xiang
ZX
Wen
Meng-Liang
ML
Peng
Qian
Q
Xu
Li-Hua
LH
D015373:Bacterial Typing Techniques; D001482:Base Composition; D002681:China; D004269:DNA, Bacterial / Q000032:analysis; D004275:DNA, Ribosomal / Q000032:analysis; D005227:Fatty Acids / Q000032:analysis; D020563:Gammaproteobacteria / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification / Q000502:physiology; D008969:Molecular Sequence Data; D009693:Nucleic Acid Hybridization; D010641:Phenotype; D010802:Phylogeny; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D017422:Sequence Analysis, DNA; D012965:Sodium Chloride; D012988:Soil Microbiology; D013045:Species Specificity
D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D005227:Fatty Acids; D012336:RNA, Ribosomal, 16S; D012965:Sodium Chloride