JOURNAL OF LIGHT INDUSTRY

CN 41-1437/TS  ISSN 2096-1553

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Effect of ultrasound-induced lactobacillus plantarum on the quality of fermented jujube juice

  • Corresponding author: LI Shunfeng, lishunfeng2000@163.com
  • Received Date: 2024-07-26
    Accepted Date: 2024-12-24
    Available Online: 2025-08-26
  • To effectively improve the quality of fermented jujube juice, this study investigated the effects of ultrasonic treatment on Lactobacillus plantarum CICC 20022 at different growth stages prior to inoculation into jujube juice for fermentation. Key quality parameters including viable cell count, total sugars, titratable acidity, total flavonoids, total phenolics, antioxidant capacity and β-glucosidase activity were systematically evaluated. The results indicated that compared to the control group, the viable cell count in the logarithmic phase ultrasoundtreated group was significantly increased by 1. 15 lg CFU/mL. The contents of titratable acid, total flavonoid and total phenol were elevated by 31. 25%, 54. 17% and 19. 05%, respectively. Moreover, the DPPH and ABTS+ radical scavenging activities were improved by 28. 26% and 19. 04% (P<0. 05), respectively. However, the total sugar and ascorbic acid contents exhibited a declining trend across different treatment stages. Additionally, both intracellular and extracellular β-glucosidase activities reached their peak values (0. 07 U/mL) in the logarithmic phase ultrasound-treated group. Sensory evaluation revealed no significant difference between the ultrasound-treated group and the control group (P > 0. 05). Ultrasound treatment could accelerate the formation of metabolites by directional regulation of the growth and metabolic activity of L. plantarum CICC 20022, and significantly improve the content of bioactive substances and flavor quality in fermented jujube juice.
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