Two Novel Alkaliphilic Species Isolated from Saline-Alkali Soil in China: Halalkalibacter flavus sp. nov., and Halalkalibacter lacteus sp. nov

文献类型： 外文期刊

第一作者： Jin, Pin-Jiao

作者： Jin, Pin-Jiao;Sun, Lei;Wang, Kang-Kang;Wang, Shuang;Liu, Yong-Hong;Mohamad, Osama Abdalla Abdelshafy;Fang, Bao-Zhu;Li, Li;Gao, Lei;Li, Wen-Jun;Wang, Shuang;Rao, Manik Prabhu Narsing;Fang, Bao-Zhu;Li, Wen-Jun;Li, Wen-Jun

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关键词： Halalkalibacter; polyphasic taxonomy; saline-alkaline soil; two novel species

期刊名称：MICROORGANISMS （ 影响因子：4.5； 五年影响因子：4.8 ）

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年卷期： 2024 年 12 卷 5 期

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收录情况： SCI

摘要： The degradation of farmland in China underscores the need for developing and utilizing saline-alkali soil. Soil health relies on microbial activity, which aids in the restoration of the land's ecosystem, and hence it is important to understand microbial diversity. In the present study, two Gram-stain-positive strains HR 1-10(T) and J-A-003(T) were isolated from saline-alkali soil. Preliminary analysis suggested that these strains could be a novel species. Therefore, the taxonomic positions of these strains were evaluated using polyphasic analysis. Phylogenetic and 16S rRNA gene sequence analysis indicated that these strains should be assigned to the genus Halalkalibacter. Cell wall contained meso-2,6-diaminopimelic acid. The polar lipids present in both strains were diphosphatidyl-glycerol, phosphatidylglycerol, and an unidentified phospholipid. The major fatty acids (>10%) were anteiso-C-15:0, C(16:)0 and iso-C-15:0. Average nucleotide identity and digital DNA#x2013;DNA hybridization values were below the threshold values (95% and 70%, respectively) for species delineation. Based on the above results, the strains represent two novel species of the genus Halalkalibacter, for which the names Halalkalibacter flavus sp. nov., and Halalkalibacter lacteus sp. nov., are proposed. The type strains are HR 1-10(T) (=GDMCC 1.2946(T) = MCCC 1K08312(T) = JCM 36285T), and J-A-003(T) (=GDMCC 1.2949(T) = MCCC 1K08417(T) = JCM 36286(T)).

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