FIGURE 4.

Effect of Micromonospora ALFpr18c root inoculation on disease development caused by B. cinerea in different defense deficient tomato lines. (A) SA-deficient nahG and (B) JA-deficient def 1 plants. Necrosis severity caused by B. cinerea was scored using a three levels disease scale: mild, moderate and severe, as shown in Supplementary Figure S2. Control, plants not inoculated with Micromonospora; pr18c 1M and pr18c 1D, plants inoculated with Micromonospora sp. ALFpr18c 1 month or 1 day before challenge with B. cinerea, respectively. Within each genotype, bars not sharing a common letter (lowercase for mild, uppercase for moderate and greek for severe symptoms) are significantly different using Bonferroni corrected Chi-square tests, followed by z-tests (P ≤ 0.05).