Induction of phytoalexins in pigeonpea (Cajanus cajan) in response to inoculation with Fusarium udum and other treatments

Pest Manag Sci. 2002 Oct;58(10):1068-72. doi: 10.1002/ps.586.

Abstract

Cajanol accumulation was monitored in four cultivars of pigeonpea, Cajanus cajan (L) Millsp, after inoculation with 2 x 10(6) conidia ml-1 of Fusarium udum Butler. Rapid accumulation was observed only in wilt-resistant cultivar ICP 9145. Another wilt-resistant cultivar, ICP 8863, had low levels of cajanol similar to those in wilt-susceptible cultivars ICP 2376 and Malawi local, indicating that rapid cajanol accumulation is not positively correlated with resistance to wilt in pigeonpea. A comparison of various inducing agents showed live conidia of the pathogen to cause more rapid accumulation than the other agents.

MeSH terms

  • Cajanus / chemistry
  • Cajanus / metabolism*
  • Cajanus / microbiology
  • Chromatography, Thin Layer
  • Fusarium / growth & development*
  • Immunity, Innate
  • Isoflavones / isolation & purification
  • Isoflavones / metabolism*
  • Phytoalexins
  • Plant Diseases / microbiology
  • Plant Extracts / isolation & purification
  • Plant Extracts / metabolism*
  • Sesquiterpenes
  • Terpenes

Substances

  • Isoflavones
  • Plant Extracts
  • Sesquiterpenes
  • Terpenes
  • cajanol
  • Phytoalexins