Shapovalova A A, Khizhniak T V, Turova T P, Sorokin D Iu
Mikrobiologiia. 2009 Jan-Feb;78(1):117-27.
A heterotrophic bacterial strain AGD 8-3 capable of denitrification under extreme haloalkaline conditions was isolated from soda solonchak soils of the Kulunda steppe (Russia). The strain was classified within the genus Halomonas. According to the results of 16S rRNA gene sequencing, Halomonas axialensis, H. meridiana, and H. aquamarina are most closely related to strain AGD 8-3 (96.6% similarity). Similar to other members of the genus, the strain can grow within a wide range of salinity and pH. The strain was found to be capable of aerobic reduction of chromate and selenite on mineral media at 160 g/l salinity and pH 9.5-10. The relatively low level of phylogenetic similarity and the phenotypic characteristics supported classification of strain AGD 8-3 as a new species Halomonas chromatireducens.
从俄罗斯库伦达草原的苏打盐土中分离出一株能够在极端盐碱条件下进行反硝化作用的异养细菌菌株AGD 8-3。该菌株被归类于嗜盐单胞菌属。根据16S rRNA基因测序结果，轴生嗜盐单胞菌、子午嗜盐单胞菌和海生嗜盐单胞菌与菌株AGD 8-3关系最为密切（相似度为96.6%）。与该属的其他成员相似，该菌株能够在广泛的盐度和pH范围内生长。研究发现，该菌株能够在盐度为160 g/l、pH为9.5 - 10的矿物培养基上对铬酸盐和亚硒酸盐进行好氧还原。相对较低的系统发育相似度和表型特征支持将菌株AGD 8-3分类为一个新物种——铬还原嗜盐单胞菌。
