Involvement of phenol metabolism in resistance of Dianthus caryophyllus to Fusarium oxysporum f.sp. dianthi

G.J. Niemann*, R.P. Baayen

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

27 Citations (Scopus)

Abstract

Three carnation cultivars were investigated for the effect of stem inoculation with Fusarium oxysporum f.sp. dianthi on production of phenolic compounds and on fungistatic activity. Carnation stems were characterized by a complex mixture of cell wall-bound phenolics, several of which occurred in considerable amounts. Only very low amounts of phenolic compound were present in the vacuoles. Infection with F. oxysporum f.sp. dianthi induced the production and accumulation of a number of new compounds, both free in the cell sap and bound to the cell wall. In addition, the stem extracts acquired germination-inhibiting properties for conidia of the fungus. The accumulation of several phenolics and the fungistatic activity were roughly correlated to the degree of resistance of the three cultivars. Part of the differences in their resistance to F. oxysporum f.sp. dianthi might be due to an inhibition of the conversion of phenolic acid-type precursors into phytoalexins in the more susceptible cultivars.

Original languageEnglish
Pages (from-to)289-301
Number of pages13
JournalNetherlands Journal of Plant Pathology
Volume94
Issue number6
DOIs
Publication statusPublished - Nov 1988
Externally publishedYes

Keywords

  • carnation
  • cell walls
  • dianthramides
  • hydroxyanthranilic acid
  • phenolic acid
  • phytoalexins

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