Appressorial Penetration and Lesion Development in gas1 and gas2 Mutants
| Variable | Guy11 (Wild Type) | BE71 (Ectopic) | BC46 (gas1) | BE55 (gas2) | DS21 (gas1 gas2) |
|---|---|---|---|---|---|
| Appressorium formationa (%) | 93.8 ± 4.1 | 90.2 ± 6.1 | 90.5 ± 3.6 | 87.7 ± 6.4 | 91.2 ± 2.7 |
| Appressorium penetration (%) | 77.3 ± 3.8 | 72.2 ± 5.4 | 25.7 ± 10.8 | 20.1 ± 11.6 | 19.9 ± 16.8 |
| Lesion formationb (lesions/5-cm leaf tip) | 46.7 ± 5.7 | 47.9 ± 4.9 | 13.0 ± 10.2 | 10.8 ± 7.0 | 9.7 ± 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.