Fig. 4.

Effect of SA187 inoculation in Arabidopsis shoots and roots on 1/2MS + 100 mM NaCl, experimental setup (A). Phenotypic assessment of the beneficial effect on the growth of 21-d-old Arabidopsis seedlings of the three treatments, on 1/2MS + 100 mM NaCl: inoculation with SA187 and addition of 100 nM KMBA or 100 nM ACC to the growth medium. Col-0 = untreated Arabidopsis as control (B). Volcano plots of Arabidopsis roots and shoots DEGs, on 1/2MS + 100 mM NaCl, for each of the three treatments: +SA187 (SPB versus SP), +100 nM KMBA (SP + KMBA versus SP), or +100 nM ACC (SP + ACC versus SP) (C). Heatmap constructed using sulfur and ethylene signaling Arabidopsis genes that are statistically significantly up-regulated (red) and down-regulated (blue) by each of the three treatments: +SA187, +100 nM KMBA, +100 nM ACC (D). Venn diagram showing up- and down-regulated genes that are common or specific for Arabidopsis shoots and roots, comparing SA187 endophytic to free-living state (q-value <0.05) (E).