Figure 3.

Treatment of intact aspen plants with jasmonates induces formation of tyloses (arrows) and gels (arrowheads) and inhibits plant growth. The panels show transverse (A–C) and radial longitudinal (D–F) sections through the secondary xylem of aspen plants treated with either JA in DMSO, MeJA in DMSO, or DMSO (control) for 2 weeks. Bar (same for all micrographs) = 100 μm. G and H, Inhibition of plant (G) and xylem (H) growth by jasmonate treatment. Data are means for two plants per treatment; asterisk indicates significant difference from the control according to a Tukey post ANOVA test at P ≤ 5%.