Figure 1.

Resistant and susceptible phenotypes used in this study and their symptoms after PWN inoculation. (A) Vertical resin ducts in the cross section of the stem for resistant and susceptible phenotypes; the bar is 100 μm. (B) Difference in the parameters of the resin ducts between resistant and susceptible phenotypes in which resistant phenotypes had a larger AC size (resin duct size), AC area (resin duct area) and AC freq (resin duct frequency) than the susceptible phenotype (AC size comparison: n = 30, p = 0.001; AC area comparison: n = 30, p = 0.003; AC freq comparison: n = 30, p = 0.009). The mean + SE is represented by each bar. Different letters “a” and “b” on top of bars indicate significant differences (t-test, α = 0.05). (C) The materials used for transcriptome sequencing and each treatment contained three biological replicates. R: resin canal; X: xylem; P: pith; nX: new xylem.