Fuerst J A, Hawkins J A, Holmes A, Sly L I, Moore C J, Stackebrandt E
Department of Microbiology, University of Queensland, Brisbane, Australia.
Int J Syst Bacteriol. 1993 Jan;43(1):125-34. doi: 10.1099/00207713-43-1-125.
Four strains of orange- or red-pigmented bacteria isolated from freshwater surfaces were shown to synthesize bacteriochlorophyll under aerobic conditions. These strains shared unusual morphological features, such as acellular stalks, crateriformlike structures, and buds, with bacteria in the order Planctomycetales. However, comparisons of 16S rRNA sequences showed them to be members of the alpha-4 subdivision of the class Proteobacteria and most closely related to the marine aerobic bacteriochlorophyll-synthesizing bacterium Erythrobacter longus. They also differ from members of the Planctomycetales phenotypically in their synthesis of bacteriochlorophyll and possession of a peptidoglycan cell wall. They can be distinguished from E. longus on the basis of their 16S rRNA sequence, the G+C content of their DNA, cellular fatty acid composition, and carbon substrate spectrum. A new genus, Porphyrobacter, with a single species, P. neustonensis gen. nov., sp. nov., is proposed for these strains. The type strain is ACM 2844.
从淡水表面分离出的四株橙色或红色色素细菌被证明在有氧条件下能合成细菌叶绿素。这些菌株与浮霉菌目细菌具有不同寻常的形态特征，如无细胞柄、火山口状结构和芽。然而，16S rRNA序列比较表明它们是变形菌纲α-4亚群的成员，与海洋需氧细菌叶绿素合成菌长红杆菌关系最为密切。它们在细菌叶绿素合成和拥有肽聚糖细胞壁方面在表型上也与浮霉菌目成员不同。根据它们的16S rRNA序列、DNA的G+C含量、细胞脂肪酸组成和碳底物谱，可以将它们与长红杆菌区分开来。为这些菌株提出了一个新属，即卟啉杆菌属，其只有一个种，即新种新属水生卟啉杆菌。模式菌株是ACM 2844。
