Genetic Analysis of Crown Rust Resistance and Phytoalexin Production in Oats

  • T. Morikawa
  • S. Mayama
Part of the World Crops: Production, Utilization, Description book series (WCPU, volume 12)


Antifungal compounds accumulate in resistant oat cultivars in response to crown rust infection. They are regarded as phytoalexins and are referred to as avenalumins I, 11 and III(l). Mayama et al. (2) examined the relationships between resistance gene expression and avenalumin accumulation employing 21 Pc lines. It is well known that the Pc-2 (Hv-1) gene controls susceptibility to victorin, the host-specific toxin produced by Helminthosporium victoriae. The toxin is also known to be an elicitor of avenalumin(3).


Rust Resistance Crown Rust Intercellular Hypha Phytoalexin Production Plant Path 
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Copyright information

© Martinus Nijhoff Publishers, Dordrecht 1986

Authors and Affiliations

  • T. Morikawa
    • 1
  • S. Mayama
    • 2
  1. 1.College of AgricultureUniversity of Osaka PrefectureJapan
  2. 2.Facu1ty of AgricultureKagawa UniversityJapan

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