期刊
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
卷 69, 期 17, 页码 5026-5039出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jafc.1c00752
关键词
solid-state fermentation; bound polyphenols; mechanism; structural characteristics; carbohydrate-hydrolyzing enzymes
资金
- Key Research and Development Program of Jiangxi Province of China [20171BBF60041]
This study demonstrated that SSF was effective in releasing higher amounts of BP from IDF compared to alkaline hydrolysis, leading to advancements in antioxidant and enzyme inhibitory activities. The destruction of hemicellulose and secretion of xylanase were crucial for the release of BP, providing insights into utilizing agricultural byproducts in a more natural and cost-effective way.
This study is aimed at exploring the release of bound polyphenols (BP) from insoluble dietary fiber (IDF) and its mechanism by solid-state fermentation (SSF) via Trichoderma viride. The results indicated that BP released by SSF (5.55 mg GAE/g DW) was significantly higher than by alkaline hydrolysis. In addition, 39 polyphenols and catabolites were detected, and the related biotransformation pathways were speculated. Quantitative analysis showed that SSF released more ferulic acid, p-coumaric acid, and organic acids, which led to advances in antioxidant, a-amylase, and a-glucosidase inhibitory activities. Furthermore, structural characteristics (scanning electron microscopy, X-ray diffraction, thermos gravimetric analysis, and Fourier transform infrared spectroscopy) and dynamic changes of carbohydrate-hydrolyzing enzymes indicated that the destruction of hemicellulose and the secretion of xylanase were vital for releasing BP. Overall, this study demonstrated that SSF was beneficial to release BP from IDF, which could provide insight into utilizing agricultural byproducts in a more natural and economical way.
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