Fig. 5.
Camalexin is important for sulfatase activity in soil and PGP effect of Arabidopsis root bacteria. (A) Col-0 and cyp71A27 were grown for 2 wk in presence of Pseudomonas sp. CH267 and 2 bacterial strains isolated from Arabidopsis roots MPI9 and MPI491 or 10 µM MgCl2 as mock, and the FW of the whole plants was measured. Data are presented as means and SE from at least 20 plants grown on 4 independent plates. Asterisks indicate significant differences between mock and bacterial treatment at P < 0.05 (Student’s t test). Two-way ANOVA revealed that FW of the plants depends on treatment (P = 7.9 × 10−11) and genotype:treatment (P = 4 × 10−5). (B) Col-0, cyp71A27, and pad3 plants were grown for 2 wk in soil (10%)/sand mixture; afterward, 2 soil samples were taken per plant, and sulfatase activity was measured. Data are presented as means and SE from 10 samples corresponding to 5 independent plants. Different letters indicate significantly different values at P < 0.05 (Student’s t test).