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首页> 外文期刊>Archives of microbiology >Characterization of Deinococcus sahariens sp. nov., a radiation-resistant bacterium isolated from a Saharan hot spring.
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Characterization of Deinococcus sahariens sp. nov., a radiation-resistant bacterium isolated from a Saharan hot spring.

机译：沙门氏菌的特征nov。，一种从撒哈拉沙漠温泉中分离出来的抗辐射细菌。

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摘要

An ultraviolet-radiation-resistant, Gram-positive, orange-pigmented, thermophilic and strictly aerobic cocci was isolated from Saharan water hot spring in Tunisia. The newly isolated bacterium, designated HAN-23(T), was identified based on polyphasic taxonomy including genotypic, phenotypic and chemotaxonomic characterization. Phylogenetic analysis based on 16S rRNA gene sequences placed this strain within Deinococcus genus. However, strain HAN-23(T) is different from recognized species of the genus Deinococcus, showing less than 94.0% similarity values to its closest relatives. The predominant cellular fatty acids determined by gas chromatography were iso-C(15:0), iso-C(17:0) and iso C(17:1) ω9c. The major respiratory quinone was MK-8. The DNA G?+?C content was 66.9?mol%. DNA-DNA hybridization measurements revealed low DNA relatedness (6%) between the novel isolate and its closest neighbor, the type strain Deinococcus geothermalis DSM 11300. On the basis of the phenotypic, chemotaxonomic and phylogenetic data, strain HAN-23(T) represents a novel species of the genus Deinococcus, for which the name Deinococcus sahariens sp. nov. is proposed, the type strain being HAN-23(T) (=DSM 18496(T); LMG 23756(T)).
机译：从突尼斯的撒哈拉温泉中分离出了耐紫外线辐射，革兰氏阳性，橙色色素，嗜热和严格需氧的球菌。根据多相分类学，包括基因型，表型和化学分类学特征，鉴定了新分离的细菌，命名为HAN-23（T）。基于16S rRNA基因序列的系统发育分析将该菌株置于Deinococcus属中。但是，菌株HAN-23（T）与公认的Deinococcus菌种不同，与其最接近的亲戚的相似度不到94.0％。气相色谱法测定的主要细胞脂肪酸为iso-C（15：0），iso-C（17：0）和iso C（17：1）ω9c。主要的呼吸醌为MK-8。 DNA G + + C含量为66.9摩尔％。 DNA-DNA杂交测量结果显示，新型分离株与其最接近的邻种Deinococcus geothermalis DSM 11300型菌株之间的DNA关联度较低（6％）。根据表型，化学分类和系统发育数据，HAN-23（T）菌株代表Deinococcus属的一种新物种，名称为Deinococcus sahariens sp。十一月提出了类型为HAN-23（T）（= DSM 18496（T）; LMG 23756（T））的菌株。

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