Euphytica

, Volume 102, Issue 3, pp 317–321

DIBOA in wild Poaceae: Sources of resistance to the Russian wheat aphid (Diuraphis noxia) and the greenbug (Schizaphis graminum)

  • Ernesto Gianoli
  • Hermann M. Niemeyer

Abstract

Hydroxamic acids are secondary metabolites typical of Poaceae that play a role in cereal resistance against pests and pathogens. The content of the hydroxamic acid aglucones DIBOA (2,4-dihydroxy-1,4-benzoxazin-3-one) and DIMBOA (2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one) was evaluated in wild Poaceae belonging to the tribes Triticeae (genera Hordeum and Elymus) and Aveneae (genera Deschampsia and Phalaris). The concentration of DIBOA in seedling extracts of the wild barleys Hordeum chilense, H. brevisubulatum subsp. violaceum and H. bulbosum was negatively correlated with parameters related to performance of the cereal aphids Schizaphis graminum and Diuraphis noxia. The relevance of the results obtained for breeding programs aimed at increasing cereal resistance against aphids is discussed.

aphids cereal breeding DIBOA Diuraphis noxia hydroxamic acids pest resistance Poaceae Schizaphis graminum 

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Copyright information

© Kluwer Academic Publishers 1998

Authors and Affiliations

  • Ernesto Gianoli
    • 1
  • Hermann M. Niemeyer
    • 1
  1. 1.Departamento de Ciencias Ecológicas, Facultad de CienciasUniversidad de Chile, CasillaSantiagoChile

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