Table 1.

Appressorial Penetration and Lesion Development in gas1 and gas2 Mutants

VariableGuy11 (Wild Type)BE71 (Ectopic)BC46 (gas1)BE55 (gas2)DS21 (gas1 gas2)
Appressorium formationa (%)93.8 ± 4.190.2 ± 6.190.5 ± 3.687.7 ± 6.491.2 ± 2.7
Appressorium penetration (%)77.3 ± 3.872.2 ± 5.425.7 ± 10.820.1 ± 11.619.9 ± 16.8
Lesion formationb (lesions/5-cm leaf tip)46.7 ± 5.747.9 ± 4.913.0 ± 10.210.8 ± 7.09.7 ± 3.0
  • a Appressorium formation and penetration were assayed on onion epidermis. The percentage of germ tubes differentiated into appressoria and the percentage of appressoria that developed infectious hyphae were determined at 48 h after inoculation.

  • b Lesion formation was examined on infected rice leaves 7 days after inoculation. Means and sd values were calculated from at least three independent experiments.