Valorization of tomato waste proteins through production of antioxidant and antibacterial hydrolysates by proteolytic Bacillus subtilis: optimization of fermentation conditions

Journal of Food Science and Technology
Ali MoayediMohammad Safari

Abstract

In this study, protein-rich waste of tomato processing industries was fermented by Bacillus subtilis A14h to produce hydrolysates with antioxidant and antibacterial activities. The effects of different levels of initial pH, incubation temperature, fermentation time, protein concentration and inoculum size on proteolytic activity, release of amino acids and peptides, antioxidant and antibacterial activities of hydrolysates were evaluated and optimized by using response surface methodology (RSM). Results showed that all the evaluated variables significantly influenced the hydrolysis and bioactivities of hydrolysates in polynomial models. Hydrolysates showed remarkable 2, 2'-diphenyl-1-picrylhydrazyl (DPPH) scavenging activity (up to 70 %), ferric ion reducing power, and inhibitory activity against B. cereus (up to 69.8 %) and E. coli (up to 29.8 %). Overall, good correlation between the concentration of amino acids and peptides, and antioxidant as well as antibacterial activities (in particular for B. cereus inhibition activity) was observed. Finally, optimum conditions for fermentative conversion of tomato waste proteins to antioxidant and antibacterial hydrolysates were established. Results of this study showed that tomato wast...Continue Reading

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Citations

Aug 31, 2016·Food Science and Technology International = Ciencia Y Tecnología De Los Alimentos Internacional·Manel MechmecheMoktar Hamdi
Jan 22, 2019·Critical Reviews in Food Science and Nutrition·Tsun-Thai ChaiFai-Chu Wong
Nov 28, 2019·Microorganisms·Annalisa RicciCamilla Lazzi
Sep 2, 2020·Antioxidants·Mingfei PanShuo Wang
Sep 20, 2018·Journal of Food Science and Technology·Manel MechmecheMoktar Hamdi
Aug 6, 2020·Foods·Saúl Olivares-GalvánMaría Concepción García
Dec 19, 2020·Comprehensive Reviews in Food Science and Food Safety·Kong Fei ChaiWei Ning Chen
Jul 17, 2018·Journal of Agricultural and Food Chemistry·Fernando G FermosoGuillermo Rodríguez-Gutiérrez
Aug 28, 2021·Biomedicine & Pharmacotherapy = Biomédecine & Pharmacothérapie·Manoj KumarMohamed Mekhemar

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