Cross-tolerance and antioxidant metabolism as determinants of the resistance of apple fruit to postharvest Botrytis decay

In apple, fruit storage properties and susceptibility to post-harvest phytopathogens differ substantially between cultivars, but little is generally understood about the molecular basis of these differences. Recently we have shown that there is a correlation between fruit vitamin C (L-ascorbic acid,...

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Published inActa horticulturae no. 9341; pp. 319 - 326
Main Authors Tuyet, B.T.A, Vanwalleghem, T, Vorstemans, B, Creemers, P, Hertog, M, Nicolaï, B, Keulemans, J, Davey, M.W
Format Journal Article
LanguageEnglish
Published International Society for Horticultural Science 2012
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Abstract In apple, fruit storage properties and susceptibility to post-harvest phytopathogens differ substantially between cultivars, but little is generally understood about the molecular basis of these differences. Recently we have shown that there is a correlation between fruit vitamin C (L-ascorbic acid, AsA), and antioxidant contents with several aspects of postharvest quality. This relationship between elevated antioxidant contents and an improved (a)biotic stress-resistance during postharvest may be related to the capacity of tissues to deal with the consequences of H2O2-production resulting from infection and/or storage stresses. Here we report on the results of a comprehensive analysis of the responses of fruit antioxidant metabolism following infection with Botrytis cinerea in the apple cultivars 'Golden Delicious' and 'Braeburn'. Results suggest that pre-harvest exposure to high-light/high temperature stress can induce cross-tolerance to post-harvest B. cinerea infection. Quantification of the major fruit flesh antioxidant metabolites (ascorbic acid, phenolics) and of the activities of enzymes involved in the detoxification of reactive oxygen species help us to understand possible involvement of antioxidant metabolism in resistance and the response of tissues to infection.
AbstractList In apple, fruit storage properties and susceptibility to post-harvest phytopathogens differ substantially between cultivars, but little is generally understood about the molecular basis of these differences. Recently we have shown that there is a correlation between fruit vitamin C (L-ascorbic acid, AsA), and antioxidant contents with several aspects of postharvest quality. This relationship between elevated antioxidant contents and an improved (a)biotic stress-resistance during postharvest may be related to the capacity of tissues to deal with the consequences of H2O2-production resulting from infection and/or storage stresses. Here we report on the results of a comprehensive analysis of the responses of fruit antioxidant metabolism following infection with Botrytis cinerea in the apple cultivars 'Golden Delicious' and 'Braeburn'. Results suggest that pre-harvest exposure to high-light/high temperature stress can induce cross-tolerance to post-harvest B. cinerea infection. Quantification of the major fruit flesh antioxidant metabolites (ascorbic acid, phenolics) and of the activities of enzymes involved in the detoxification of reactive oxygen species help us to understand possible involvement of antioxidant metabolism in resistance and the response of tissues to infection.
Author Nicolaï, B
Vorstemans, B
Davey, M.W
Tuyet, B.T.A
Creemers, P
Keulemans, J
Hertog, M
Vanwalleghem, T
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Snippet In apple, fruit storage properties and susceptibility to post-harvest phytopathogens differ substantially between cultivars, but little is generally understood...
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SubjectTerms apples
ascorbic acid
Botrytis cinerea
cultivars
enzymes
metabolism
metabolites
phenolic compounds
reactive oxygen species
storage quality
Title Cross-tolerance and antioxidant metabolism as determinants of the resistance of apple fruit to postharvest Botrytis decay
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