Suppressor- and Elicitor-Activities of Magnaporthe Grisea Toxin in Rice Leaves

  • S. Arase
  • M. Ueno
  • Y. Honda
Chapter

Abstract

The rice blast fungus Magnaporthe grisea (Hebert) Barr (anamorph Pyricularia oryzae Cavara) causes the most serious disease of rice. Many genetic studies have demonstrated that blast resistance of rice plants is controlled by several major gene pairs, and that resistance against the rice blast fungus differs among rice cultivars (Kiyosawa, 1974). Resistance or susceptibility of rice plants to M. grisea is determined by race-cultivar combinations (Yamada et al., 1976). Further, the fungus can also infect other Graminae such as barley, Italian ryegrass, and corn (Asuyama, 1965; Yaegashi 1981). Thus, the rice blast fungus offers an excellent system for studying molecular determinants of host species specificity and cultivar specificity. Host specific-toxins (Nishimura and Kohmoto, 1983; Otani et al., 1995; Scheffer and Yoder, 1983; Walton, 1996; Yoder, 1980) or suppressors (Doke et al, 1980; Oku et al, 1987) are well known as pathogenicity factors of fungal pathogens. In the M. grisea-plant system, however, the pathogenicity factors involved in host susceptibility have not heretofore been demonstrated.

Keywords

Blast Resistance Rice Leave Italian Ryegrass Rice Blast Fungus Blast Resistance Gene 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 2002

Authors and Affiliations

  • S. Arase
    • 1
  • M. Ueno
    • 1
  • Y. Honda
    • 1
  1. 1.Faculty of Life and Environmental ScienceShimane UniversityMatsueJapan

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