Abstract:
:Three strains of budding, ellipsoid-shaped and rosette-forming bacteria were isolated from acidic Sphagnum-dominated boreal wetlands of northern Russia and were designated strains MPL7T, MOB77 and SB2. The presence of crateriform pits and numerous fibrillar appendages on the cell surface and an unusual spur-like projection on one pole of the cell indicated a planctomycete morphotype. These isolates are moderately acidophilic, mesophilic organisms capable of growth at pH values between 4.2 and 7.5 (with an optimum at pH 5.0-6.2) and at temperatures between 4 and 32 degrees C (optimum 15-26 degrees C). The major fatty acids are C16:0 and C16:1omega7c; the major quinone is MK-6. The G+C content of the DNA is 54.4-56.5 mol%. Strains MPL7T, MOB77 and SB2 possess nearly identical 16S rRNA gene sequences and belong to the planctomycete lineage defined by the genus Planctomyces, being most closely related to Planctomyces limnophilus DSM 3776T (86.9-87.1% sequence similarity). However, strain MPL7T showed only 28% DNA-DNA hybridization with P. limnophilus DSM 3776T. Compared with currently described members of the genus Planctomyces, the isolates from northern wetlands do not form long and distinctive stalks, have greater tolerance of acidic conditions and low temperatures, are more sensitive to NaCl, lack pigmentation and degrade a wider range of biopolymers. The data therefore suggest that strains MPL7T, MOB77 and SB2 represent a novel genus and species, for which the name Schlesneria paludicola gen. nov., sp. nov., is proposed. Strain MPL7T (=ATCC BAA-1393T=VKM B-2452T) is the type strain of Schlesneria paludicola.
journal_name
Int J Syst Evol Microbiolauthors
Kulichevskaya IS,Ivanova AO,Belova SE,Baulina OI,Bodelier PLE,Rijpstra WIC,Sinninghe Damsté JS,Zavarzin GA,Dedysh SNdoi
10.1099/ijs.0.65157-0subject
Has Abstractpub_date
2007-11-01 00:00:00pages
2680-2687issue
Pt 11eissn
1466-5026issn
1466-5034journal_volume
57pub_type
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