Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.14/6825
Título: Polyphenoloxidase activity and total phenolic content as related to browning of minimally processed ‘Jonagored’ apple
Autor: Rocha, Ada MCN
Morais, Alcina MMB
Palavras-chave: Browning
Malus
Pumila
Jonagored
Polyphenoloxidase
Phenols
Phenolic content
Storage
Data: 2002
Editora: Wiley
Citação: ROCHA, Ada MCN; MORAIS, Alcina MMB - Polyphenoloxidase activity and total phenolic content as related to browning of minimally processed ‘Jonagored’ apple. Journal of the Science of Food and Agriculture. ISSN 0022-5142.Vol. 82 (2002), p. 120-126
Resumo: Phenolic content, polyphenoloxidase (PPO) activity and browning have been reported by different authors to vary in different ways, depending on cultivar, picking maturity, storage conditions, etc. Numerous authors have attempted to correlate browning results with the phenolic content and/or enzymatic activity of apples, but data published in the literature are divergent as to which of the two factors, ie the enzyme or the substrate, plays the decisive role in the overall phenomenon of enzymatic browning. The aim of this work was to follow the PPO activity and phenolic content of minimally processed apple (cv ‘Jonagored’) during cold storage and to establish a potential relationship with enzymatic browning. Increasing storage time of minimally processed apple seemed to result in an increase in PPO activity. No changes (P > 0.05) in total phenolic content were observed during storage. Colour degradation of apple cubes, as indicated by changes in colour parameters, was found to be highly correlated with PPO activity. Browning of ‘Jonagored’ apple cubes during storage was found to be moderately correlated with PPO activity. No correlation was found between the browning index and the total phenolic content.
Peer review: yes
URI: http://hdl.handle.net/10400.14/6825
Versão do Editor: [The definitive version is available at www3.interscience.wiley.com
Aparece nas colecções:ESB - Artigos em revistas internacionais com Arbitragem / Papers in international journals with Peer-review

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