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INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY logo

Volume 70, Issue 7

sp. nov., a bacterium isolated from garden soil sample Free

Abstract

A novel bacterial strain, designated MAH-6, was isolated from a garden soil sample. Cells were Gram-stain-negative, aerobic, non-motile and rod-shaped. The colonies were light yellow, smooth, circular and 0.6–1.2 mm in diameter when grown on nutrient agar for 3 days. Strain MAH-6 grew at 15–35 °C, at pH 5.0–7.0 and with 0–0.5 % NaCl. Cell growth occurred on nutrient agar and Reasoner's 2A (R2A) agar. The strain was positive for both catalase and oxidase tests. Cells were able to hydrolyse starch, aesculin, Tween 20 and Tween 80. According to 16S rRNA gene sequence comparisons, the isolate was identified as a member of the genus and was most closely related to B2-7 (98.2 % sequence similarity), SY-6 (96.9 %) and NBD5 (96.6 %). The novel strain MAH-6 has a draft genome size of 4 370 740 bp (28 contigs), annotated with 4199 protein-coding genes, 46 tRNA and three rRNA genes. The genomic DNA G+C content of the strain was determined to be 66.2 mol% and the predominant isoprenoid quinone is Q-10. The major fatty acids were identified as summed feature 8 (comprising C ω7 and/or C ω6), C 2OH and C. The main polar lipids were phosphatidylcholine, sphingoglycolipid, phosphatidylethanolamine, phosphatidylglycerol and diphosphatidylglycerol. Based on the results of phenotypic, genotypic, chemotaxonomic and DNA–DNA hybridization studies, strain MAH-6 represents a novel species, for which the name sp. nov. is proposed, with MAH-6 as the type strain (=KACC 19292=CGMCC1.13654).

  • Received:
  • Accepted:
  • Published Online:
Keyword(s): 16S rRNA gene , Gram-stain-negative , Sphingomonas chungangi and ubiquinone-10
Funding
This study was supported by the:
  • National Research Foundation of Korea (Award Project no. NRF-2018R1C1B5041386)
    • Principle Award Recipient: Md. Amdadul Huq
© 2020 The Authors
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2020-06-09
2024-04-19
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Sphingomonas chungangi sp. nov., a bacterium isolated from garden soil sample
Int J Syst Evol Microbiol 70, 4151 (2020); https://doi.org/10.1099/ijsem.0.004267
/content/journal/ijsem/10.1099/ijsem.0.004267
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