Figure 1.

Effect of bacterial inoculation on Arabidopsis 14-day-old seedling morphological traits. (A) Primary root length, expressed in cm; (B) secondary roots density, expressed as number of secondary roots per cm of primary root; (C) projected leaves area, expressed in square cm. Data presented are means of 30 biological replicates ± standard deviation (S.D.). Asterisks indicate statistically significant differences between control condition (not inoculated) and treatments (inoculated), according to ANOVA and Tukey’s test (p < 0.05).