丝状细菌形态型“嗜盐碱节杆菌”I在低G+C革兰氏阳性细菌中至少包含两个先前已描述的属。
The filamentous bacterial morphotype 'Nostocoida limicola' I contains at least two previously described genera in the low G+C gram positive bacteria.
作者信息
Liu J R, Burrell P, Seviour E M, Soddell J A, Blackall L L, Seviour R J
机构信息
Biotechnology Research Centre, La Trobe University, Bendigo, Victoria, Australia.
出版信息
Syst Appl Microbiol. 2000 Dec;23(4):528-34. doi: 10.1016/S0723-2020(00)80027-2.
Isolates of eight bacterial filaments fitting the published morphological description of 'Nostocoida limicola' I were obtained from the mixed liquor of four different Australian and one Czech Republic activated sludge plants by micromanipulation. On the basis of their near complete (Ben 200 and Ben 201), or partial (Ben 77, Ben 78, Ben 202, Ben 203, Ben 204 and Ben 205) 16S rRNA gene sequences, six of these isolates were 99.3-100% similar to Lactosphaera pasteurii and Trichococcus flocculiformis, a bulking filament only reported previously in Germany. The other two (Ben 203 and Ben 204) were 99.9% similar to Streptococcus suis. Hence, all are in the low mol % G+C gram-positive bacteria division of the Bacteria. On this evidence 'N. limicola' I is phylogenetically unrelated to 'Nostocoida limicola' II, which is now known to be in the Actinobacteria, even though these two filamentous bacteria appearing in activated sludge systems have been considered to be closely related to each other historically.
通过显微操作从四个不同的澳大利亚活性污泥厂和一个捷克共和国活性污泥厂的混合液中获得了八株符合已发表的“I型泥生颤藻（Nostocoida limicola）”形态学描述的细菌丝状体分离株。基于它们近乎完整（Ben 200和Ben 201）或部分（Ben 77、Ben 78、Ben 202、Ben 203、Ben 204和Ben 205）的16S rRNA基因序列，其中六株分离株与巴氏乳球菌（Lactosphaera pasteurii）和絮凝丝状球菌（Trichococcus flocculiformis）相似度为99.3%-100%，而后者是一种此前仅在德国报道过的膨胀丝状菌。另外两株（Ben 203和Ben 204）与猪链球菌（Streptococcus suis）相似度为99.9%。因此，所有这些都属于细菌中的低mol% G+C革兰氏阳性菌分类。基于此证据，I型泥生颤藻在系统发育上与II型泥生颤藻无关，II型泥生颤藻现在已知属于放线菌，尽管历史上出现在活性污泥系统中的这两种丝状菌一直被认为彼此密切相关。
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