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Int J Syst Evol Microbiol 59 (2009), 2064-2068; DOI  10.1099/ijs.0.006783-0
© 2009 International Union of Microbiological Societies

Lactobacillus taiwanensis sp. nov., isolated from silage

Li-Ting Wang, Hsiao-Ping Kuo, Yen-Chi Wu, Chun-Ju Tai and Fwu-Ling Lee

Bioresource Collection and Research Center, Food Industry Research and Development Institute, PO Box 246, Hsinchu 30099, Taiwan, ROC

Correspondence
Fwu-Ling Lee
fll{at}firdi.org.tw

Strain FIRDI 006T, isolated from silage cattle feed, was characterized by using phenotypic and molecular taxonomic methods. The strain was a homofermentative lactic acid bacterium; the cells stained Gram-positive and were catalase-negative, non-motile, facultatively anaerobic rods. 16S rRNA gene sequence analysis revealed that the strain belongs phylogenetically to the genus Lactobacillus and can be placed within the Lactobacillus acidophilus–delbrueckii group. Lactobacillus gasseri and Lactobacillus johnsonii were the most closely related species, with 16S rRNA gene sequence similarities of 99.53 and 99.46 % to the respective type strains. Low gyrB gene sequence similarities (<90 %) and low DNA–DNA reassociation values (<45 %) were obtained between the strain and the phylogenetically closest neighbours. Based on phenotypic and genetic evidence, the strain is considered to represent a novel species, for which the name Lactobacillus taiwanensis sp. nov. is proposed. The type strain is FIRDI 006T (=BCRC 17755T =DSM 21401T).

The GenBank/EMBL/DDBJ accession numbers for the 16S rRNA and gyrB gene sequences of strain BCRC 17755T (=FIRDI 006T) are respectively EU487512 and EU647675.

Neighbour-joining and maximum-parsimony phylogenetic trees based on 16S rRNA and gyrB gene sequences of the novel strain and related species and detailed results of DNA–DNA hybridization studies are available as supplementary material with the online version of this paper.






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