Response of Arabidopsis WT and edr2 mutant plants to E. cichoracearum.
(a) Col-0 and edr2 plants were inoculated with E. cichoracearum and leaves detached for photography 8 days after inoculation.
(b) Fungal hyphae growing on the surface of Col-0 leaves 5 days after infection, stained with trypan blue.
(c) Fungal hyphae growing on the surface of the edr2 mutant leaves 5 days after infection. Mesophyll cell death (arrow) is apparent at this stage.
(d) Extensive conidia (arrow) produced on Col-0 leaves 7 days after infection.
(e) Extensive mesophyll cell death (arrow) in edr2 mutant leaves 7 days after infection, but very few conidia.