Abstract
Repurposing by-products to alternative applications has become a vital part of food research. Barley rootlets (BRs) are a side-stream of malting and brewing industries. This study focuses on processing BRs into food ingredients, using fermentation with five lactic acid bacteria (LAB) as a valorisation technique. The strains used were Lactiplantibacillus plantarum FST 1.7, Lactobacillus amylovorus FST2.11, Weissella cibaria MG1, Leuconostoc citreum TR116 and Limosilactobacillus reuteri R29. The influence of fermentation on sugar/FODMAP/acid compositions and microbial metabolites in BRs was analysed. A variety of techno-functional properties were also evaluated. Results showed BRs were a suitable substrate for LAB, particularly for Lactiplantibacillus plantarum FST 1.7 and Lactobacillus amylovorus FST2.11. Sugar, acid and the FODMAP composition of the fermented BRs demonstrated various traits imparted by LABs, including high mannitol production from Leuconostoc citreum TR116 and Limosilactobacillus reuteri R29. Limosilactobacillus reuteri R29 also produced fructans using BRs as a substrate. A techno-functional analysis of BRs showed a significant reduction in α-amylase activity post sterilisation and fermentation. Fermentation reduced water-binding capacity and significantly increased oil-binding capacity. The LAB used displayed great potential in improving the functionality of BRs as a food ingredient while also showcasing LAB fermentation as a viable processing aid for BR valorisation.
Funder
European Union’s Horizon 2020 research and innovation program
Subject
Plant Science,Biochemistry, Genetics and Molecular Biology (miscellaneous),Food Science
Reference93 articles.
1. Briggs, D.E. (1998). Malts and Malting, Blackie Academic & Professional. [1st ed.].
2. Kunze, W. (2004). Technology Brewing and Malting, VLB. [3rd ed.].
3. Stewart, G.G., Russell, I., and Anstruther, A. (2017). Handbook of Brewing, Taylor & Francis Group. [3rd ed.].
4. Neylon, E., Arendt, E.K., Lynch, K.M., Zannini, E., Bazzoli, P., Monin, T., and Sahin, A.W. (2020). Rootlets, a Malting By-Product with Great Potential. Fermentation, 6.
5. Side-stream products of malting: A neglected source of phytochemicals;Koistinen;npj Sci. Food,2020
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