Figure 6.

Root gravitropic responses of different genotypes under oxidative stress. Four-day-old seedlings were reoriented by 90° and the root curvature (angle) was measured after 24 h. Gravitropic curvature was diminished by paraquat (PQ) treatment in all genotypes except for trx h3, trx o and wav2-1, in which the angle of curvature was similar in seedlings treated and untreated with PQ. The trx h1, wild type (Col-0), nhr1 and ahr1 genotypes showed significant differences in their gravitropic curvatures when treated with PQ (as determined by two-way ANOVA and Tukey's post-hoc, P < 0.05, from three biological replicates). n = 30