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Título

Phenolic compounds and related enzymes as determinants of quality in fruits and vegetables

AutorTomás Barberán, Francisco; Espín de Gea, Juan Carlos
Palabras clavePhenolics
Anthocyanins
Flavonols
Hydroxycinnamates
Flavan-3-ols
Tannins
Isoflavones
Stilbenes
Lignans
Flavanones
Enzymatic browning
Food quality
Fruit
Vegetables
Health-promoting properties
Polyphenol oxidases
Peroxidases
Phenolic metabolism
Phenylalanine ammonia-lyase
PPO
POD
PAL
Fecha de publicación13-jun-2001
EditorJohn Wiley & Sons
CitaciónJournal of the Science of Food and Agriculture 81(9): 853-876 (2001)
ResumenPhenolic secondary metabolites play an important role in plant-derived food quality, as they affect quality characteristics such as appearance, flavour and health-promoting properties. Their content in foods is affected by many factors that influence phenolic stability, biosynthesis and degradation. In terms of their biosynthesis the key enzyme phenylalanine ammonia-lyase (PAL) is especially relevant, as it can be induced by different stress (environmental) conditions. In addition, polyphenol oxidases (PPO) and peroxidases (POD) are the main enzymes responsible for quality loss due to phenolic degradation. The different factors affecting phenolic-related food quality are reviewed. These include internal (genetic) and environmental (agronomic) factors, technological treatments applied during postharvest storage of fruits and vegetables, as well as processing and storage of the processed products. The different strategies that are required to either maintain or enhance the phenolic-related quality of foods are critically reviewed. Genetic modification designed to decrease polyphenol oxidases or peroxidases is not always a feasible method, owing to side problems related to the growth and defence of the plant. Agronomic treatments can be used to enhance the phenolic content and pigmentation of fruits and vegetables, although the information available on this topic is very scarce and even contradictory. Some postharvest treatments (cold storage, controlled or modified atmospheres, etc) can also improve phenolic-related quality, as well as new processing methods such as irradiation (gamma, UV), high-field electric pulses, high hydrostatic pressures and microwaves.
Descripción24 pages, 4 tables.
Versión del editorhttp://dx.doi.org/10.1002/jsfa.885
URIhttp://hdl.handle.net/10261/18151
DOI10.1002/jsfa.885
ISSN0022-5142
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