An anaerobic, rod-shaped, mesophilic, chemolithoautotrophic, sulfate-reducing bacterial strain IOR2^T was isolated from a newly found deep-sea hydrothermal vent (OVF, Onnuri Vent Field) area in the central Indian Ocean ridge (11°24′88″ S 66°25′42″ E, 2021 m water depth). The 16S rRNA gene sequence analysis revealed that the strain IOR2^T was most closely related to Desulfovibrio senegalensis BLaC1^T (96.7%). However, it showed low similarity with the members of the family Desulfovibrionaceae, such as Desulfovibrio tunisiensis RB22^T (94.0%), D. brasiliensis LVform1^T (93.9%), D. halophilus DSM 5663^T (93.7%), and Pseudodesulfovibrio aespoeensis Aspo-2^T (93.2%). The strain IOR2^T could grow at 23–42°C (optimum 37°C), pH 5.0–8.0 (optimum pH 7.0) and with 0.5–6.5% (optimum 3.0%) NaCl. The strain could use lactate, pyruvate, H₂, and glycerol as electron donors and sulfate, thiosulfate, and sulfite as electron acceptors. The major fatty acids of the strain IOR2^T were iso-C_15:0, iso-C_17:0, ante-iso-C_15:0, and summed feature 9 (C_16:0 methyl/iso-C_17:1ω9c). Both the strains IOR2^T and BLaC1^T could grow with CO₂ and H₂ as the sole sources of carbon and energy, respectively. Genomic evidence for the Wood-Ljungdahl pathway in both the strains reflects chemolithoautotrophic growth. The DNA G + C content of the strain IOR2^T and BLaC1^T was 58.1–60.5 mol%. Based on the results of the phylogenetic and physiologic studies, Paradesulfovibrio onnuriensis gen. nov., sp. nov. with the type strain IOR2^T (= KCTC 15845^T = MCCC 1K04559^T) was proposed to be a member of the family Desulfovibrionaceae. We have also proposed the reclassification of D. senegalensis as Paradesulfovibrio senegalensis comb. nov.

中文翻译：

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洋葱对硫磺弧菌 十一月，sp。nov。，一种从印度洋的Onnuri气田分离出的减少化学自养型硫酸盐的细菌，并将塞内加尔Desulfovibrio senegalensis重新分类为Paradesulfovibrio senegalensis梳。十一月

厌氧，棒状，嗜温，化能自养，硫酸盐还原细菌菌株IOR2 ^Ť从一个新发现的深海热液喷口（OVF，Onnuri喷口区）区域在中央印度洋脊分离（11°24'88“ S 66°25′42″ E，2021 m水深）。16S rRNA基因序列分析表明，菌株IOR2 ^T与塞内加尔脱硫弧菌BLaC1 ^T密切相关（96.7％）。然而，它显示出低的相似度与家庭成员Desulfovibrionaceae，如脱硫弧菌tunisiensis RB22 ^Ť（94.0％），D.巴西LVform1 ^Ť（93.9％），D.嗜盐DSM 5663 ^T（93.7％）和Pseudodesulfovibrio aespoeensis Aspo-2 ^T（93.2％）。IOR2 ^T菌株可以在23–42°C（最佳37°C），pH 5.0–8.0（最佳pH 7.0）和0.5–6.5％（最佳3.0％）的NaCl中生长。该菌株可以使用乳酸，丙酮酸，H ₂和甘油作为电子供体，并使用硫酸盐，硫代硫酸盐和亚硫酸盐作为电子受体。菌株IOR2 ^T的主要脂肪酸为iso-C _15：0，iso-C _17：0，ante-iso-C _15：0和总和9（C _16：0甲基/ iso-C _17：1 ω 9 ç）。两种菌株IOR2 ^TBLaC1 ^T和BLaC1 ^T可能分别以CO ₂和H ₂作为唯一的碳和能量来源生长。这两个菌株中Wood-Ljungdahl途径的基因组证据都反映了化石自养菌的生长。IOR2 ^T和BLaC1 ^T菌株的DNA G + C含量为58.1–60.5 mol％。根据系统发育和生理学研究的结果，我们发现了Paradesulfovibrio onnuriensis gen。十一月，sp。十一月 IOR2 ^T型菌株（= KCTC 15845 ^T = MCCC 1K04559 ^T）被认为是脱硫弧菌科的成员。我们还提出了塞内加尔丁香的重新分类如塞内加尔对虾。十一月