Fig. 1. The effect of bacterial endophytes on the tomato plants growth. The effect of the bacterial endophytes P. fluorescens YsS6 wild type, P. fluorescens YsS6 ACC deaminase
deficient mutant, P. migulae 8R6 wild type, and P. migulae 8R6 ACC deaminase deficient mutant P. migulae 8R6 on shoot fresh weight (Panel a), shoot dry weight (Panel b), sodium
content (Panel c), and chlorophyll content (Panel d) of the tomato plants. Seeds treated with 0.03 M MgSO4 served as a control (C). A group of 24 pots (96 plants) was set for each
treatment, and the entire experiment was repeated two times. A two-way ANOVA was performed. Significant differences between groups were analyzed by Tukey’s post-test for
each test strain and compared with controls. For each bar, the values represented by the same lower-case letter are not significantly different at P < 0.05. All the measurements were
taken following 11 weeks of growth. Error bars indicate 1 standard error of the mean.