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INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY logo

Volume 68, Issue 1

sp. nov., a moderately thermophilic and halophilic species isolated from plant root Free

Abstract

A Gram-stain-positive strain, designated DT7-02, was isolated from the surface-sterilized root of (evening primrose) and subjected to taxonomic characterization. Cells of DT7-02 were slender rod-shaped, motile by means of flagella, and oxidase- and catalase-positive. The colonies were circular, pinkish-yellow, opaque, glistering and 1–2 mm in diameter. The strain was moderately thermophilic and halophilic, as growth occurred at 20–44 °C (optimum 40 °C), pH 7–10 (optimum pH 8–9) and in the presence of 0–8 % of NaCl (optimum 4 %) in tryptic soy broth. The analysis of 16S rRNA gene sequences indicated that the strain represented a member of the genus of the family , and the sequence similarity was 96.5 % with P-207 and 95.9 % with NIOT-bflm-S4. Other related taxa were DSM 22953 and KCTC 33117, with 16S rRNA gene sequence similarities of 95.4 and 94.3 %, respectively. The major cellular fatty acids of DT7-02 were anteiso-C, anteiso-C and iso-C. The DNA G+C content was 35.1 mol%, and the respiratory quinone was MK-7. The major polar lipids were phosphatidylglycerol, diphosphatidylglycerol and phosphatidylethanolamine. The combination of chemotaxonomic properties enabled differentiation of DT7-02 from the other two species of the genus . The results of phylogenetic, phenotypic and chemotaxonomic analyses demonstrate that strain DT7-02 (=KCTC 33854=JCM 31192) merits recognition as representing a novel species of the genus for which the name sp. nov. is proposed.

  • Received:
  • Accepted:
  • Published Online:
Keyword(s): Bacillaceae , endophyte , halophile , moderate thermophile and Pseudogracilibacillus endophyticus
© 2018 IUMS
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2018-01-01
2024-04-19
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Pseudogracilibacillus endophyticus sp. nov., a moderately thermophilic and halophilic species isolated from plant root
Int J Syst Evol Microbiol 68, 165 (2018); https://doi.org/10.1099/ijsem.0.002475
/content/journal/ijsem/10.1099/ijsem.0.002475
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