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    STUDIA BIOLOGIA - Ediţia nr.1 din 2019  
         
  Articol:   BACILLUS ALKALISOLI SP. NOV., ISOLATED FROM ALKALINE SOILS.

Autori:  GUOHONG LIU, XUEFANG ZHENG, JIEPING WANG, JIANMEI CHE, BO LIU.
 
       
         
  Rezumat:  The genus Bacillus belongs to the family Bacillaceae in the phylum Firmicutes and represents a large group of rod-shaped, aerobic or facultatively anaerobic, Gram- positive endospore-forming bacteria with low DNA G+C content (32–66 mol%) (Logan & De Vos, 2009). During a survey of the diversity of Bacillus-like species in western region of China, a novel strain FJAT-45086 was found that differs from the known Bacillus species. The genomics-based polyphasic taxonomy was used to identified the strain (Ramsamy et al., 2014). Cells of strain FJAT-45086 were aerobic, endospore-forming and motile with a single polar flagellum. The growth requirements were: 15-35oC (optimum 30oC), pH 6-12 (optimum 9), with NaCl concentration 0-10% (optimum 4 %). The major cellular fatty acids were anteiso-C15:0 and C16:0. The phylogeny of 16S rRNA gene revealed strain FJAT-45086 had the highest similarity with Bacillus hemicellulosilyticus JCM 9152T (96.7 %); their isDDH and ANI value was 22.7 % and 84.79 %, respectively. The DNA G+C content was 37.81 mol%. The diagnostic diamino acid of the cell-wall peptidoglycan was meso-DAP. MK-7 was the predominant quinone. Major polar lipids were DPG, PE, PG and PC. Based on polyphasic evidence presented, strain FJAT-45086 (= DSM 104056 = CCTCC AB 2016232) is considered as the type strain, for which the name Bacillus alkalisoli sp. nov. is proposed.

Keywords: alkalitolerant, Bacillus alkalisoli, genome; polyphasic taxonomy.
 
         
     
         
         
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