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Int. J. Mol. Sci. 2017, 18(2), 377; doi:10.3390/ijms18020377

Polyphenol Oxidases in Crops: Biochemical, Physiological and Genetic Aspects

1
SINAGRI S.r.l.-Spin off dell’Università degli Studi di Bari “Aldo Moro”, 70126 Bari, Italy
2
Dipartimento di Scienze del Suolo, della Pianta e degli Alimenti, Università degli Studi di Bari “Aldo Moro”, 70126 Bari, Italy
3
Consiglio per la ricerca in agricoltura e l’analisi dell’economia agraria, Centro di ricerca per l’orticoltura, 84098 Pontecagnano Faiano, Italy
*
Author to whom correspondence should be addressed.
Academic Editor: Gopinadhan Paliyath
Received: 15 November 2016 / Revised: 31 January 2017 / Accepted: 4 February 2017 / Published: 10 February 2017
(This article belongs to the Section Molecular Botany)
View Full-Text   |   Download PDF [816 KB, uploaded 13 February 2017]   |  

Abstract

Enzymatic browning is a colour reaction occurring in plants, including cereals, fruit and horticultural crops, due to oxidation during postharvest processing and storage. This has a negative impact on the colour, flavour, nutritional properties and shelf life of food products. Browning is usually caused by polyphenol oxidases (PPOs), following cell damage caused by senescence, wounding and the attack of pests and pathogens. Several studies indicated that PPOs play a role in plant immunity, and emerging evidence suggested that PPOs might also be involved in other physiological processes. Genomic investigations ultimately led to the isolation of PPO homologs in several crops, which will be possibly characterized at the functional level in the near future. Here, focusing on the botanic families of Poaceae and Solanaceae, we provide an overview on available scientific literature on PPOs, resulting in useful information on biochemical, physiological and genetic aspects. View Full-Text
Keywords: browning; polyphenol oxidase activity; PPO genes; Solanaceae; Poaceae browning; polyphenol oxidase activity; PPO genes; Solanaceae; Poaceae
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Taranto, F.; Pasqualone, A.; Mangini, G.; Tripodi, P.; Miazzi, M.M.; Pavan, S.; Montemurro, C. Polyphenol Oxidases in Crops: Biochemical, Physiological and Genetic Aspects. Int. J. Mol. Sci. 2017, 18, 377.

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