Bacillus lacisalsi sp. nov., a moderately haloalkaliphilic bacterium isolated from a saline–alkaline lake

  • Luna Dong
  • Shuangyan Wang
  • Hao Cao
  • Baisuo Zhao
  • Xiaoxia Zhang
  • Kun Wu
  • Haisheng WangEmail author
Original Paper


An alkaliphilic and moderately halophilic strain, designated YSP-3T, characterised by optimal growth at pH 9.0 and at 8.0% (w/v) NaCl, was isolated from Yangshapao Lake, Jilin Province, China. Cells of this strain is Gram-positive, straight rods and form a central or sub-terminal ellipsoidal endospore. Phylogenetic analysis based on 16S rRNA gene sequences indicated that it was grouped in the genus Bacillus with Bacillus aurantiacus K1-5T and Bacillus populi FJAT-45347T as the close relative (97.5 and 97.2% 16S rRNA gene sequence similarity, respectively). Genomic relatedness between strain YSP-3T and its close relative was evaluated using average nucleotide identity, digital DNA–DNA hybridization and average amino acid identity with the values of 70.3–85.1%, 19.7–20.1% and 71.5–71.6%, respectively. Comparative genomics analysis showed that strain YSP-3T has distinct amino acid bias and significantly differences from foreign invasion events during evolution relative to the reference strains. Cell-wall peptidoglycan contains meso-diaminopimelic acid. The predominant polar lipids are phosphatidylethanolamine, diphosphatidylglycerol, phosphatidylglycerol. The predominant quinone is menaquinone-7. The major fatty acids of strain YSP-3T are anteiso-C15:0, iso-C15:0, iso-C16:0, anteiso-C17:0 and Iso-C14:0. DNA G + C content of strain YSP-3T is 48.3 mol%. Based on genomics analysis, physiological, biochemical and chemotaxonomic data, strain YSP-3T represent a novel species, for which the name Bacillus lacisalsi sp. nov. is proposed. The type strain is YSP-3T (  = ACCC 60365T = KCTC 33934T).


Bacillaceae Polyphasic taxonomy Comparative genomics Amino acid bias 



This work was supported by National Natural Science Foundation of China (Grant No. 31300101) and Fundamental Research Funds for Central Non-profit Scientific Institution (Grant No. 1610042018005).

Author contributions

DL and WS wrote the main manuscript text. WH designed the experiments. DL and WS carried out the experiments. WH, ZB and ZX analysed the data. All authors approved and read the final manuscript.

Compliance with ethical standards

Conflicts of interest

The authors declare no conflicts of interest regarding this manuscript.

Ethical approval

No specific ethical or institutional permits were required to conduct sampling and the experimental studies did not involve endangered or protected species.

Supplementary material

10482_2019_1322_MOESM1_ESM.docx (1.3 mb)
Supplementary material 1 (DOCX 1350 kb)


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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Graduate SchoolChinese Academy of Agricultural SciencesBeijingPeople’s Republic of China
  2. 2.College of Life ScienceHenan Agricultural UniversityZhengzhouPeople’s Republic of China
  3. 3.Key Laboratory of Microbial Resources Collection and Preservation, Ministry of Agriculture, Institute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural SciencesBeijingPeople’s Republic of China

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