Elicited cell suspension cultures of apple (Malus x domestica) cv. Liberty produce biphenyl phytoalexins

W. Borejsza-Wysocki, C. Lester, A. B. Attygalle, G. Hrazdina

Research output: Contribution to journalArticlepeer-review

35 Scopus citations

Abstract

Yeast extract treated cell suspension cultures from a scab (Venturia inaequalis) resistant apple cultivar, Malus x domestica cv. Liberty produce dibenzofuran and biphenyl compounds as part of their defense system against fungal invasion. We have isolated and identified three biphenyl derivatives, 4-hydroxy-3,5-dimethoxybiphenyl (aucuparin), 2',4,-dihydroxy-3,5- dimethoxybiphenyl (2'-hydroxy-aucuparin) and 2'-O-β-D-glucopyranosyl-4- hydroxy-3,5-methoxybiphenyl (2'-o-β-D-glucopyranosylaucuparin) from the cells and the medium and show here their chemical properties. Although this is the first identification of 2'-glucopyranosylaucuparin, its aglycone, 2'- hydroxyaucuparin, and aucuparin have been reported previously [Kokubun, T., Harborne, J.B., Phytochemistry, 1995, 40, 1649-1654.] from fungus infected wood of Malus species. Production of an array of dibenzofuran and biphenyl derivatives in response to fungal attack may be an important part of the disease resistance mechanism of scab resistant apple cultivars.

Original languageEnglish
Pages (from-to)231-235
Number of pages5
JournalPhytochemistry
Volume50
Issue number2
DOIs
StatePublished - 26 Jan 1999

Keywords

  • 2',4-dihydroxy-3,5-dimethoxybiphenyl
  • 2'-O-β-D- Glucopyranosyl-4-hydroxy-3,5-dimethoxybiphenyl
  • 2'-O-β-D- Glucopyranosylacuparin
  • 2'-hydroxyaucuparin
  • 4-hydroxy-3,5- dimethoxybiphenyl
  • Apple
  • Aucuparin
  • Biphenyl
  • Cell suspension
  • Elicitation
  • Malus x domestica
  • Phytoalexin
  • Rosaceae

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