Selection of brown spot‐resistant rice plants from Helminthosporium oryzae toxin‐resistant calluses uri icon

abstract

  • Helminthosporium oryzae toxin induced electrolyts leakage from ice callus tissues and caused their browining and death. A virulent isolate of the pathogen invaded and colonised callus tissues rapidly, while a less virulent and a nonpathogenic isolate colonised calluses only weakly if at all. Addition of the toxin to calluses permitted colonisation of calluses by the nonpathogenic isolate. Four toxin-resistant calluses were selected and plants regenerated from two of these resistant calluses showed resistance to the pathogen. This resistance was heritable and stability of resistance was observed in the R1, R2 and R3 generations.

publication date

  • 1990
  • 1990
  • 1990