Figure 8.

Resistance in Arabidopsis mlo2 mlo6 mlo12 triple mutants is characterized by complete failure of successful host cell invasion.

The micrograph shows attempted penetration of numerous G. orontii sporelings at 48 hours post-inoculation on a highly resistant mlo2 mlo6 mlo12 triple mutant in the genetic background of otherwise susceptible Col-0 (Consonni et al., 2006). Note the aborted fungal entry evidenced by a lack of secondary hyphae compared to the situation in a Col-0 wild type plant (Figure 4B). Scale bar: 100 μm.