Fig. 4

Disease symptoms of Botrytis cinerea (strain SAS56 containing pCutGUS) on inoculated leaves of cv Desiree and StDND1 well-silenced potato plants at 24 h post inoculation (Scale bar = 100 μm). a and d photos of B. cinerea infected leaves of cv Desiree and StDND1 well-silenced potato plants. Yellow arrows point to the inoculation sites, where lesions can be seen on the cv Desiree leaf but not on the StDND1 well-silenced leaf. b and e and c and f GUS and DAB staining of leaf samples from B. cinerea infected cv Desiree and StDND1 well-silenced potato plants. The small black arrows in b mark hyphae extending below the plane of focus