Necrotic Lesion formation is a late and not fully penetrant phenotype in bps1 mutants. (A). 14-day bps1-1 cotyledon with necrotic lesions. (B). Onset and penetrance of necrotic lesion formation. Green bars represent the percent of plants with no lesions, and brown bars represent the percent with one or more necrotic lesion. Neither the L.er nor Col-0 wild type produced any necrotic lesions, whereas for both bps1-1 and bps1-2 mutants formed necrotic lesion starting between day 8 and 10, after which lesion number increased steadily. N = 84 (L.er), 140 (bps1-1), 48 (Col-0), 80 (bps1-2) (C) Average number of lesions per seedling. The number of lesions per seedling is depicted as a function of time, and bars show standard deviation. size bar = 1 mm.