FIGURE 2.

The effect of acdS expression or growth in soil inoculated with P. migulae 8R6 on root length (A) and dry weight (B) of C. sativa in presence of salt (NaCl; 15 and 20 dSm^-1). Soil was treated with buffer (control), P. sp. UW4, P. migulae 8R6 or its acdS mutant 8R6M, P. fluorescens YsS6 or its acdS mutant YsS6M. Transgenic lines tested were single insert, homozygous lines expressing the acdS gene under the control of the root-specific rolD promoter or the constitutive CaMV 35S promoter. Salt was applied 19 days after sowing and root material harvested 20 days afterward. Error bars indicate standard error (n = 10). A two- way ANOVA and Tukey post-test were used to detect significant differences between groups. Asterisks (^∗) above bars indicate values that were significantly different (p < 0.05) from the control.