Figure 2.

Bgh-triggered cell death in a partially resistant mlo mutant. Macroscopic phenotypes of wild-type Mlo, partially and fully resistant mlo mutants 7 d after fungal challenge. In the Mlo genotype (compatible interaction), no sign of cell death is visible beneath the sporulating colony. In the mlo-28 mutant (partially resistant), necrotic mesophyll cells are visible beneath a small fungal colony, and in the mlo-5 null mutant (fully resistant), a cluster of necrotic mesophyll cells can be seen beneath the failed penetration attempt. Bar = 50 μm.