Figure 7.

The effect of photoperiod on susceptibility to B. cinerea requires normal DELLA function. A and B, Resistance to B. cinerea infection represented by relative lesion size in mutants affected in DELLA genes in either the Columbia (A) or Landsberg erecta (B) background. C, Resistance to B. cinerea infection in wild-type (WT) and cop1 mutant plants with or without compromised DELLA function conferred by the gai rga double mutation. Data are means ± se of five plant replicates. Different letters indicate significant differences (P < 0.05) among means determined by Bonferroni posthoc tests. The significant interaction between cop1 and gai rga determined by factorial ANOVA is shown in C.