Enzymatic browning: The role of substrates in polyphenol oxidase mediated browning

Andrew Tilley; Mark P. McHenry; Julia Anwar McHenry; Vicky Solah; Kirsty Bayliss

doi:10.1016/j.crfs.2023.100623

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Enzymatic browning: The role of substrates in polyphenol oxidase mediated browning

Journal article

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Enzymatic browning: The role of substrates in polyphenol oxidase mediated browning

Andrew Tilley, Mark P. McHenry, Julia Anwar McHenry, Vicky Solah and Kirsty Bayliss

Current research in food science, Vol.7, 100623

2023

DOI: https://doi.org/10.1016/j.crfs.2023.100623

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Abstract

Browning

Oxidation

Phenolic

Polyphenol

PPO

Vegetables

Enzymatic browning is a biological process that can have significant consequences for fresh produce, such as quality reduction in fruit and vegetables. It is primarily initiated by polyphenol oxidase (PPO) (EC 1.14.18.1 and EC 1.10.3.1) which catalyses the oxidation of phenolic compounds. It is thought that subsequent non-enzymatic reactions result in these compounds polymerising into dark pigments called melanins. Most work to date has investigated the kinetics of PPO with anti-browning techniques focussed on inhibition of the enzyme. However, there is substantially less knowledge on how the subsequent non-enzymatic reactions contribute to enzymatic browning. This review considers the current knowledge and recent advances in non-enzymatic reactions occurring after phenolic oxidation, in particular the role of non-PPO substrates. Enzymatic browning reaction models are compared, and a generalised redox cycling mechanism is proposed. The review identifies future areas for mechanistic research which may inform the development of new anti-browning processes. [Display omitted]

Details

Title: Enzymatic browning: The role of substrates in polyphenol oxidase mediated browning
Authors/Creators: Andrew Tilley - School of Medical, Molecular & Forensic Sciences, College of Environmental & Life Sciences, Murdoch, 6150, Western Australia, Australia
Mark P. McHenry - Murdoch University
Julia Anwar McHenry - Mt Lindesay, 56 McHenry Lane, Scotsdale, 6333, Western Australia, Australia
Vicky Solah - Murdoch University, Centre for Crop and Food Innovation
Kirsty Bayliss - Murdoch University, Centre for Biosecurity and One Health
Publication Details: Current research in food science, Vol.7, 100623
Publisher: Elsevier B.V
Identifiers: 991005612269107891
Murdoch Affiliation: Centre for Water, Energy and Waste; College of Environmental and Life Sciences; Food Futures Institute; Harry Butler Institute; School of Medical, Molecular and Forensic Sciences
Language: English
Resource Type: Journal article

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