Production of conjugated dienoic and trienoic fatty acids by lactic acid bacteria and bifidobacteria

TERÁN, V; LUNA PIZARRO, P; ZACARÍAS, M.F; VINDEROLA, G.; MEDINA, R; VAN NIEUWENHOVE, C

Journal of Functional Foods

Elsevier

Año: 2015 p. 417 - 425

1756-4646

The production of conjugated linoleic (CLA) and linolenic (CLNA) acids by lactic acid bacteria(LAB) and bifidobacteria strains was assessed.The initial selection was based on opticaldensity measurements by the UV method and GC analysis. The LAB strains showed a lowerability to synthesise CLA and CLNA. Yet, two Lactobacillus sakei strains were the best producers.Moreover, the production of CLA and CLNA by Lactobacillus mucosae is reported herefor the first time. In contrast, bifidobacteria strains were more efficient to synthesise CLAand CLNA. Among these, the t9, t11-CLA was the main isomer, which is a potentanticarcinogenic compound. All tested strains produced the c9,t11,c15-CLNA isomer. Highsubstrate concentrations of LA and LNA negatively affected the conversion rate of CLA andCLNA by Bifidobacterium animalis subsp. lactis INL2, even though the bacterial growth wasnot affected.