Phylogenetic and morphologic complexity of giant sulphur bacteria
Phylogenetic and morphologic complexity of giant sulphur bacteria
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巨型硫细菌的系统发育和形态复杂性
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
A. Teske
中科院分区：
文献类型：
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作者：
V. Salman;J. Bailey;A. Teske
大型硫磺细菌最早发现于世纪早期，其中包括一些迄今为止已确定的最大细菌。单个细胞通常肉眼可见，直径可达750 μm。细胞通常具有折射光的元素硫内含物和大的内部水泡，其将细胞质限制在最外围。在某些分类群中，已经证明液泡也可以储存高毫摩尔浓度的硝酸盐。在过去的两个世纪里，贝氏菌科的形态变异范围很广，但目前的标准微生物学技术（包括16S rRNA基因测序和培养）常常无法对该分支的代表菌进行可靠的分类，而且这些细菌的可靠分类往往很复杂。在这里，我们提出了在过去几年中所做的努力和取得的成就的总结，并给出调查的异质性和可能的进化发展，在这个非凡的细菌组的观点。
The large sulphur bacteria, first discovered in the early nineteenth century, include some of the largest bacteria identified to date. Individual cells are often visible to the unaided eye and can reach 750 μm in diameter. The cells usually feature light-refracting inclusions of elemental sulphur and a large internal aqueous vacuole, which restricts the cytoplasm to the outermost periphery. In some taxa, it has been demonstrated that the vacuole can also serve for the storage of high millimolar concentrations of nitrate. Over the course of the past two centuries, a wide range of morphological variation within the family Beggiatoaceae has been found. However, representatives of this clade are frequently recalcitrant to current standard microbiological techniques, including 16S rRNA gene sequencing and culturing, and a reliable classification of these bacteria is often complicated. Here we present a summary of the efforts made and achievements accomplished in the past years, and give perspectives for investigating the heterogeneity and possible evolutionary developments in this extraordinary group of bacteria.