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INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY logo International Journal of Systematic and Evolutionary Microbiology

Volume 75, Issue 1

sp. nov., isolated from tree bark ( Chev.) and its antioxidant activity No Access

Abstract

A Gram-stain-positive, facultatively anaerobic, rod-shaped strain, designated SPB1-3, was isolated from tree bark. This strain exhibited heterofermentative production of -lactic acid from glucose. Optimal growth was observed at 25–40 °C, pH 4.0–7.0, and in the presence of 3% (w/v) NaCl. The cell wall peptidoglycan contained lysine and aspartic acid. The predominant fatty acids identified were C and the Summed feature 7 (C 7c/C c and/or C 6c/7c/19cy). The polar lipid profile included phosphatidylglycerol, diphosphatidylglycerol and phosphatidylinositol, along with two unidentified phospholipids, two unidentified amino lipids and two unidentified lipids. Phylogenetic analysis based on 16S rRNA gene sequences positioned strain SPB1-3 within the genus , showing a close relation to NBRC 111893 (99.86%) and CCTCC M 2011381 (98.65%). The whole genome of strain SPB1-3 comprised 1 932 998 base pairs with 1955 coding genes and a DNA G+C content of 37.8%. Digital DNA–DNA hybridization between strain SPB1-3 and closely related type strains ranged from 19.50 to 27.20%. The average nucleotide identity ranged from 84.21 to 85.56%, and the average amino acid identity ranged from 57.25 to 85.99%, both falling below the established thresholds for species delineation. Strain SPB1-3 was clearly distinguishable from related species based on its phenotypic and chemotaxonomic characteristics, 16S rRNA gene sequence similarity and whole genome analysis. Additionally, the strain exhibited radical scavenging activity at 66.92% and demonstrated 82.32% inhibition in the tyrosinase inhibitory assay. These findings support the classification of strain SPB1-3 as a novel species within the genus , for which the name sp. nov. is proposed. The type strain is SPB1-3 (=JCM 35081=TISTR 10005).

  • Received:
  • Accepted:
  • Published Online:
Keyword(s): lactic acid bacteria , Lentilactobacillus terminaliae , polyphasic taxonomy and tree bark
Funding
This study was supported by the:
  • National Research Council of Thailand (Award N42A670852)
    • Principal Award Recipient: SukanyaPhuengjayaem
© 2025 The Authors
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2025-01-27
2025-12-07

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Lentilactobacillus terminaliae sp. nov., isolated from tree bark (Terminalia ivorensis Chev.) and its antioxidant activity
Int J Syst Evol Microbiol 75, 006649 (2025); https://doi.org/10.1099/ijsem.0.006649
/content/journal/ijsem/10.1099/ijsem.0.006649
/content/journal/ijsem/10.1099/ijsem.0.006649
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