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UV irradiation Alters the Levels of Flavonoids Involved in the Defence Mechanism of Citrus aurantium Fruits against Penicillium digitatum

Abstract

The effect of UV irradiation on the levels of the flavanone, naringin, and the polymethoxyflavone, tangeretin, in the peel of Citrus aurantium fruits is described, as changes in the synthesis and/or accumulation of these compounds after infection with Penicillium digitatum. The growth of P. digitatum on previously irradiated fruit was reduced by up to 45%. Changes in flavonoid levels were detected, associated with inhibition of fungus growth, the naringin content falling by 69% and tangeretin levels increasing by 70%. The possible participation of naringin and tangeretin in the defence mechanism of this Citrus species is discussed.

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Arcas, M., Botía, J., Ortuño, A. et al. UV irradiation Alters the Levels of Flavonoids Involved in the Defence Mechanism of Citrus aurantium Fruits against Penicillium digitatum. European Journal of Plant Pathology 106, 617–622 (2000). https://doi.org/10.1023/A:1008704102446

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  • DOI: https://doi.org/10.1023/A:1008704102446

  • Citrus
  • flavanone
  • flavone
  • fungitoxins
  • naringin
  • tangeretin