Abstract
The genus Pectinatus is currently composed by two species, Pectinatus cerevisiiphilus and Pectinatus frisingensis, both asociated with beer spoilage. This study describes a novel isolate (strain B6) retrieved from a wastewater treatment plant collecting residues from a large number of wineries. Based on similarity analysis of 16S rRNA gene sequences, strain B6 belongs to the genus Pectinatus. Strain B6 is a strict anaerobe like other Pectinatus species and it presents non-motile, coccoid cells showing a slight oval shape. Strain B6 shows marked physiological differences with other Pectinatus species both in fatty acid composition and carbon source utilization. The most abundant fatty acids found in strain B6 were 18:1 (42.8%) and 16:0 (18.3%) representing a total of over 61% of fatty acids in this microorganism while these fatty acids represented 41.3% in P. cerevisiiphilus T and 2.4% in P. frisingensis T of their total. Fatty acid 15:0 was not significant in strain B6 and represented 28.6% and 13.3% for P. cerevisiiphilus T and P. frisingensis T, respectively. Strain B6 showed a faster growth rate and higher optimum temperature than its relatives P. cerevisiiphilus and P. frisingensis. Strain B6, P. cerevisiiphilus and P. frisingensis could be clearly differentiated by acid production tests from substrates such as esculine and gluconate, and the lack of acid production from rhamnose and fucose among others. G+C mol% content in strain B6 is 36.5%. Based on genotypic and phenotypic differences, strain B6 is proposed as a novel Pectinatus species, P. portalensis nov. sp. Both strain B6 and the two described species of Pectinatus grow on beers and wines. These results provide insights about the origin and reservoirs of Pectinatus species and spoiling alcoholic beverages.
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Gonzalez, J.M., Jurado, V., Laiz, L. et al. Pectinatus portalensis nov. sp., a relatively fast-growing, coccoidal, novel Pectinatus species isolated from a wastewater treatment plant. Antonie Van Leeuwenhoek 86, 241–247 (2004). https://doi.org/10.1023/B:ANTO.0000047931.55259.33
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DOI: https://doi.org/10.1023/B:ANTO.0000047931.55259.33