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<p>This study evaluated LAB isolates regarding their probiotic properties and technological potential for exopolysaccharide (EPS) production, as well as assessing EPS production by <i>Leuconostoc mesenteroides</i> KLM6 and the technological impact on a fermented dairy beverage with water-soluble oat extract (FDBO). The strain was previously reported as safe and as having probiotic potential. EPS production was evaluated at different fermentation temperatures and in combination with <i>Streptococcus thermophilus</i> TA40. The highest values for EPS production among the evaluated conditions were observed at 38&#xa0;°C (183.55&#xa0;mg/L) and 50&#xa0;°C (186.89&#xa0;mg/L). FDBO showed good stability over 28 days of refrigerated storage, with appropriate pH and acidity values, low syneresis, good water-holding capacity, and KLM6 viability greater than 6 log CFU/mL. Furthermore, FDBO demonstrated high antioxidant activity (73.1%), satisfactory microbiological parameters, and excellent sensory acceptance. It is concluded that the isolates (<i>n</i> = 8) demonstrated probiotic potential and absence of virulence and resistance genes. <i>Leuconostoc mesenteroides</i> KLM6 produces EPS, and the biopolymer has technological potential for use in fermented functional foods in a dairy matrix combined with water-soluble oat extract.</p> Graphical abstract <p></p>

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Production of exopolysaccharides by lactic acid bacteria and technological impact on fermented dairy beverage with water-soluble oat extract

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年7月15日

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  • Silvana de Souza Sigali,
  • Caroline Krause Bierhals,
  • Maria Fernanda Fernandes Siqueira,
  • Joice da Silva Ramson,
  • Pedro Fernandes Viana,
  • Isabela Schneid Kroning,
  • Khadija Bezerra Massaut,
  • Mariane Igansi Alves,
  • Angelita da Silveira Moreira,
  • Márcia Arocha Gularte,
  • Graciela Volz Lopes,
  • Ângela Maria Fiorentini

摘要

This study evaluated LAB isolates regarding their probiotic properties and technological potential for exopolysaccharide (EPS) production, as well as assessing EPS production by Leuconostoc mesenteroides KLM6 and the technological impact on a fermented dairy beverage with water-soluble oat extract (FDBO). The strain was previously reported as safe and as having probiotic potential. EPS production was evaluated at different fermentation temperatures and in combination with Streptococcus thermophilus TA40. The highest values for EPS production among the evaluated conditions were observed at 38 °C (183.55 mg/L) and 50 °C (186.89 mg/L). FDBO showed good stability over 28 days of refrigerated storage, with appropriate pH and acidity values, low syneresis, good water-holding capacity, and KLM6 viability greater than 6 log CFU/mL. Furthermore, FDBO demonstrated high antioxidant activity (73.1%), satisfactory microbiological parameters, and excellent sensory acceptance. It is concluded that the isolates (n = 8) demonstrated probiotic potential and absence of virulence and resistance genes. Leuconostoc mesenteroides KLM6 produces EPS, and the biopolymer has technological potential for use in fermented functional foods in a dairy matrix combined with water-soluble oat extract.

Graphical abstract