Journal
LETTERS IN APPLIED MICROBIOLOGY
Volume 76, Issue 9, Pages -Publisher
OXFORD UNIV PRESS
DOI: 10.1093/lambio/ovad092
Keywords
antioxidant; Bifidobacterium; phenolic compound; fiber; fruit waste; Lactobacillus
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This study evaluated the fermentation of araticum, baru, and pequi by-products using probiotic strains and found that araticum and pequi by-products can promote the growth of Lactobacillus strains. The fermentation of araticum and baru by-products can increase the levels of bioactive compounds.
Fruit by-products, due to their unique chemical composition containing dietary fibers and bioactive compounds, may favor the growth of probiotic strains. This study evaluated the fermentation of araticum, baru, and pequi by-products using Lactobacillus acidophilus (La-5, LA3, and NCFM) and Bifidobacterium animalis subsp. lactis (Bb-12) probiotic strains. We assessed probiotic viability, short-chain fatty acid levels, and bioactive compound levels after 48 h of fermentation. Araticum and pequi by-products led to counts higher than 6 log CFU/mL after 48-h fermentation for all Lactobacillus strains, but only the araticum by-product supported the growth of the Bb-12 strain. Fermentation of araticum by-product resulted in greater amounts of acetate (39.97 mM for LA3 and 39.08 mM for NCFM) and propionate (0.20 mM for NCFM), while baru by-product showed greater amounts of butyrate (0.20 mM for La-5 and Bb-12). Fermentation of araticum and baru by-products resulted in an increase in bioactive compounds, with the latter showing total phenolic compounds and antioxidant activity from 1.4 to 1.7 and from 1.3 to 3.1 times higher, respectively, than the negative control treatment. Araticum by-product exhibited a higher potential for prebiotic effects, and fermentation by the tested probiotic strains is essential to increase bioactive compound levels.
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