Markers for oxidative stress associated with soft rots in French beans (Phaseolus vulgaris) infected by Botrytis cinerea

  • Muckenschnabel I
  • Williamson B
  • Goodman B
 et al. 
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The role of active oxygen species has been studied in spreading soft-rot lesions caused by the necrotrophic fungal pathogen Botrytis cinerea Pers.:Fr. in leaves of four genotypes of French bean (Phaseolus vulgaris L.). Large increases were observed for the aldehydic end-products of oxidative damage, malondialdehyde and 4-hydroxy-2-nonenal, as a result of infection in each of the genotypes studied. Similar increases were found in a stable free radical and g=4.27 Fe(III) signals, but not Mn(II) signals, in electron paramagnetic resonance spectra. These changes were accompanied by large decreases in ascorbic acid levels, with changes in the antioxidant glutathione being genotype dependent.

Author-supplied keywords

  • Antioxidant
  • Botrytis
  • Free radicals
  • Lipid peroxidation
  • Oxidative stress
  • Phaseolus

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  • I. Muckenschnabel

  • B. Williamson

  • B. A. Goodman

  • G. D. Lyon

  • D. Stewart

  • N. Deighton

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