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Metabolite profiles of lactic acid bacteria in grass silage
Department of Chemistry, Swedish University of Agricultural Sciences, Sweden.
Department of Microbiology, Swedish University of Agricultural Sciences, Uppsala, Sweden.
Department of Microbiology, Swedish University of Agricultural Sciences, Uppsala, Sweden.
Department of Microbiology, Swedish University of Agricultural Sciences, Uppsala, Sweden.
2007 (English)In: Applied and Environmental Microbiology, ISSN 0099-2240, E-ISSN 1098-5336, Vol. 73, no 17, 5547-5552 p.Article in journal (Refereed) Published
Abstract [en]

The metabolite production of lactic acid bacteria JAB) on silage was investigated. The aim was to compare the production of antifungal metabolites in silage with the production in liquid cultures previously studied in our laboratory. The following metabolites were found to be present at elevated concentrations in silos inoculated with LAB strains: 3-hydroxydecanoic acid, 2-hydroxy-4-methylpentanoic acid, benzoic acid, catechol, hydrocinnamic acid, salicylic acid, 3-phenyllactic acid, 4-hydroxybenzoic acid, (trans, trans)-3,4-dihydroxycyclohexane-1-carboxylic acid, p-hydrocoumaric acid, vanillic acid, azelaic acid, hydroferulic acid, p-coumaric acid, hydrocaffeic acid, ferulic acid, and caffeic acid. Among these metabolites, the antifungal compounds 3-phenyllactic acid and 3-hydroxydecanoic acid were previously isolated in our laboratory from liquid cultures of the same LAB strains by bioassay-guided fractionation. It was concluded that other metabolites, e.g., p-hydrocoumaric acid, hydroferulic acid, and p-coumaric acid, were released from the grass by the added LAB strains. The antifungal activities of the identified metabolites in 100 mM lactic acid were investigated. The MICs against Pichia anomala, Penicillium roqueforti, and Aspergillus fumigatus were determined, and 3-hydroxydecanoic acid showed the lowest MIC (0.1 mg ml(-1) for two of the three test organisms).

Place, publisher, year, edition, pages
Washington, USA: American Society for Microbiology , 2007. Vol. 73, no 17, 5547-5552 p.
National Category
Biocatalysis and Enzyme Technology Microbiology
Identifiers
URN: urn:nbn:se:oru:diva-52298DOI: 10.1128/AEM.02939-06ISI: 000249246700020PubMedID: 17616609Scopus ID: 2-s2.0-34548488909OAI: oai:DiVA.org:oru-52298DiVA: diva2:971976
Available from: 2016-09-19 Created: 2016-09-16 Last updated: 2017-10-17Bibliographically approved

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