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Open AccessArticle

Fermentation by Multiple Bacterial Strains Improves the Production of Bioactive Compounds and Antioxidant Activity of Goji Juice

1
College of Agriculture, Ningxia University, Yinchuan 750021, China
2
Ningxia Key Laboratory for Food Microbial-Applications Technology and Safety Control, Ningxia University, Yinchuan 750021, China
3
College of Biosystems Engineering and Food Science, National-Local Joint Engineering Laboratory of Intelligent Food Technology and Equipment, Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang Engineering Laboratory of Food Technology and Equipment, Zhejiang University, Hangzhou 310058, China
*
Author to whom correspondence should be addressed.
Academic Editors: Isabel C.F.R. Ferreira and Derek J. McPhee
Molecules 2019, 24(19), 3519; https://doi.org/10.3390/molecules24193519
Received: 2 September 2019 / Revised: 24 September 2019 / Accepted: 26 September 2019 / Published: 28 September 2019
(This article belongs to the Section Analytical Chemistry)
Microorganisms can be used for enhancing flavors or metabolizing functional compounds. The fermented-food-derived bacterial strains comprising Bacillus velezensis, Bacillus licheniformis, and Lactobacillus reuteri mixed with Lactobacillus rhamnosus and Lactobacillus plantarum were used to ferment goji berry (Lycium barbarum L.) juice in this study. The fermentation abilities and antioxidant capacities of different mixtures of multiple strains in goji juice were compared. The results showed that the lactic acid contents increased 9.24–16.69 times from 25.30 ± 0.71 mg/100 mL in goji juice fermented using the SLV (Lactobacillus rhamnosus, Lactobacillus reuteri, and Bacillus velezensis), SZP (Lactobacillus rhamnosus, Lactobacillus plantarum, and Bacillus licheniformis), and SZVP (Lactobacillus rhamnosus, Lactobacillus plantarum, Bacillus velezensis, and Bacillus licheniformis) mixtures, and the protein contents increased 1.31–2.11 times from 39.23 ± 0.67 mg/100 mL. In addition, their contents of volatile compounds increased with positive effects on aroma in the fermented juices. Conversion of the free and bound forms of phenolic acids and flavonoids in juice was influenced by fermentation, and the antioxidant capacity improved significantly. Fermentation enhanced the contents of lactic acid, proteins, volatile compounds, and phenols. The antioxidant capacity was strongly correlated with the phenolic composition. View Full-Text
Keywords: goji juice; fermentation; multiple bacterial strains; volatile compound; antioxidant capacity goji juice; fermentation; multiple bacterial strains; volatile compound; antioxidant capacity
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MDPI and ACS Style

Liu, Y.; Cheng, H.; Liu, H.; Ma, R.; Ma, J.; Fang, H. Fermentation by Multiple Bacterial Strains Improves the Production of Bioactive Compounds and Antioxidant Activity of Goji Juice. Molecules 2019, 24, 3519.

AMA Style

Liu Y, Cheng H, Liu H, Ma R, Ma J, Fang H. Fermentation by Multiple Bacterial Strains Improves the Production of Bioactive Compounds and Antioxidant Activity of Goji Juice. Molecules. 2019; 24(19):3519.

Chicago/Turabian Style

Liu, Yuxuan; Cheng, Huan; Liu, Huiyan; Ma, Ruoshuang; Ma, Jiangtao; Fang, Haitian. 2019. "Fermentation by Multiple Bacterial Strains Improves the Production of Bioactive Compounds and Antioxidant Activity of Goji Juice" Molecules 24, no. 19: 3519.

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