This study investigated the effects of exopolysaccharides 809 (EPS809) derived from Ligilactobacillus salivarius AR809 on properties of low-fat fermented milk (LFFM).Results showed that neither AR809 nor EPS809 significantly altered the pH of LFFM.However, EPS809 enhanced the water - holding capacity (WHC) of LFFM in a dose - dependent manner, reaching 50.19% at 0.06 g/mL.Rheological analysis indicated that the addition of AR809 or EPS809 improved the viscoelastic properties and structural stability of LFFM.Texture profile analysis (TPA) revealed that the optimal textural parameters were achieved at 0.06 g/mL EPS809, with minimum hardness (42.96 g), peak viscosity (1.74 g), and cohesiveness (0.62).Microstructural analysis showed that EPS809 induced structural densification, characterized by enhanced macroporous network formation and reduced free water content.In terms of volatile flavor compounds, the analysis indicated that EPS809 promoted the biosynthesis of alcohols, esters, and acids.Microrheological evaluation demonstrated differential modulation of the elasticity index (EI), fluidity index (FI), and macroviscosity index (MVI).Peak EI and MVI values were observed at 0.04 g/mL EPS809, with significant variations in the FI.Overall, these findings suggested that EPS809 could effectively enhance the quality of LFFM by optimizing multiple parameters.
YIN Xin
,
CUI Fengyi
,
WANG Guangqiang
,
SONG Xin
,
YANG Yijin
,
XIONG Zhiqiang
,
AI Lianzhong
,
XIA Yongjun
. Effects of Ligilactobacillus salivarius AR809 and its exopolysaccharides on the processing characteristics of low-fat fermented milk[J]. Food and Fermentation Industries, 2025
, 51(21)
: 150
-158
.
DOI: 10.13995/j.cnki.11-1802/ts.042242
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