Table 1

Asexual sporulation (measured as the mean number of sporangiophores per cotyledon; maximum of 20 sporangiophores counted per cotyledon) by three incompatible isolates of Peronospora parasitica on Col-0, the mutant ndr1-1, and two transformed lines of ndr1-1. RPP resistance specificities for each isolate are indicated. The cotyledon assay used has been described previously (31). SEM, standard error of the mean; n, number of seedlings inoculated.

Arabidopsis linePeronospora isolate
Cala2-RPP2Emwa1-RPP4Emoy2-RPP4
Mean SEM(n)MeanSEM(n)MeanSEM(n)
Col-0 0.180.07 (76) 4.01 0.28 (86) 5.94 0.40 (58)
ndr1-1 0.95 0.11 (85) 10.54 0.57(95) 14.66 0.60 (86)
ndr1-1 FH60.03 0.03 (87) 4.89 0.29 (128) 7.000.41 (93)
ndr1-1 CB17 0.69 0.10(100) 10.91 0.53 (100) 14.030.62(87)