Changes in Organic Acids, Phenolic Compounds, and Antioxidant Activities of Lemon Juice Fermented by <i>Issatchenkia terricola</i>

High content of citric acid in lemon juice leads to poor sensory experience. The study aimed to investigate the dynamics changes in organic acids, phenolic compounds, and antioxidant activities of lemon juice fermented with <i>Issatchenkia terricola</i> WJL-G4. The sensory evaluation of...

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Autores principales: Biao Liu, Dongxia Yuan, Qiaoyue Li, Xin Zhou, Hao Wu, Yihong Bao, Hongyun Lu, Ting Luo, Jinling Wang
Formato: article
Lenguaje:EN
Publicado: MDPI AG 2021
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Acceso en línea:https://doaj.org/article/9912fb0ea3e04c59b8c3ec9727efc80f
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Sumario:High content of citric acid in lemon juice leads to poor sensory experience. The study aimed to investigate the dynamics changes in organic acids, phenolic compounds, and antioxidant activities of lemon juice fermented with <i>Issatchenkia terricola</i> WJL-G4. The sensory evaluation of fermented lemon juice was conducted as well. <i>Issatchenkia terricola</i> WJL-G4 exhibited a potent capability of reducing the contents of citric acid (from 51.46 ± 0.11 g/L to 8.09 ± 0.05 g/L within 60 h fermentation) and increasing total phenolic level, flavonoid contents, and antioxidant activities compared to those of unfermented lemon juice. A total of 20 bioactive substances, including 10 phenolic acids and 10 flavonoid compounds, were detected both in fermented and unfermented lemon juice. The lemon juice fermented for 48 h had better sensory characteristics. Our findings demonstrated that lemon juice fermented with <i>Issatchenkia terricola</i> exhibited reduced citric acid contents, increased levels of health-promoting phenolic compounds, and enhanced antioxidant activities.