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Solibacillus daqui sp. nov., isolated from high-temperature Daqu.

Authors
  • Liang, Yuan1, 2
  • Shi, Wei1, 2
  • Wu, Lin-Huan3
  • Zhang, Xiao-Juan2
  • Chai, Li-Juan2
  • Liu, Guang-Qian4
  • Zheng, Lei4
  • Wang, Song-Tao4
  • Zhang, Su-Yi4
  • Chen, Fu-Wei5
  • Shen, Cai-Hong4
  • Xu, Zheng-Hong1, 2, 4
  • Lu, Zhen-Ming1, 2, 4
  • 1 Key Laboratory of Industrial Biotechnology of Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, PR China. , (China)
  • 2 National Engineering Research Center of Cereal Fermentation and Food Biomanufacturing, Jiangnan University, Wuxi 214122, PR China. , (China)
  • 3 Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, PR China. , (China)
  • 4 National Engineering Research Center of Solid-State Brewing, Luzhou 646000, PR China. , (China)
  • 5 Guizhou Zhongjian Wine Industry Group Co. LTD, Zunyi 564500, PR China. , (China)
Type
Published Article
Journal
INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY
Publisher
Microbiology Society
Publication Date
Nov 01, 2023
Volume
73
Issue
11
Identifiers
DOI: 10.1099/ijsem.0.006109
PMID: 37916708
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

A Gram-stain-positive, rod-shaped, endospore-forming, aerobic bacterial strain, designated ZS111008T, was isolated from high-temperature Daqu, a starter for production of Chinese Jiang-flavour Baijiu, and was characterized by polyphasic taxonomy. This novel isolate grew in the presence of 0-5 % (w/v) NaCl, at pH 6.0-9.0 and 25-45 °C; optimum growth was observed with 1 % (w/v) NaCl, at pH 8.0 and 30 °C. A comparative analysis of the 16S rRNA gene sequence (1461 bp) of strain ZS111008T showed highest similarity to Solibacillus silvestris DSM12223T (96.7%), followed by Solibacillus cecembensis PN5T (96.6%) and Solibacillus isronensis AMCK01000046 (96.5%). The DNA G+C content of strain ZS111008T was 37.21 mol%. The respiratory quinone was identified as menaquinone-7 and the major polar lipids were diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine, phosphatidylserine and one unknown phospholipid. Lys was detected as the diagnostic diamino acid in the cell wall. Based on morphological characteristics, chemotaxonomic characteristics and physiological properties, strain ZS111008T represents a novel species of the genus Solibacillus, for which the name Solibacillus daqui sp. nov. is proposed. The type strain for this proposed species is ZS111008T (=CGMCC 1.19455T=JCM 35214T).

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