Abstract
Potato residue is a rich source of dietary fibre. Herein, the effects of unmodified and enzymes (cellulase and xylanase) modified potato residue dietary fibres on distribution of intestinal microbiotas and production of short-chain fatty acids (SCFAs) of C57BL/6 mice were evaluated. Results showed that enzymatic modification increased soluble dietary fibre content in potato residue. Administration of these dietary fibre promoted the production of acetic acid, n-butyric acid, iso-butyric acid, valeric acid, and iso-valeric acid, while inhibiting propionic acid content (p < 0.05). The potato residue dietary fibre improved the richness and diversity of intestinal microflora of mice, particularly increased Bacteroidetes to Firmicutes ratio (p < 0.05). Modification by cellulase and xylanase significantly improved the regulating bioactivities towards gut microbiota and increased values in food applications of potato residue dietary fibres. These dietary fibres have the potential to act as therapeutic agents to treat dysbiosis in the intestinal microbiota.
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