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. 2019 Dec 19;21(1):50. doi: 10.3390/ijms21010050

Figure 1.

Figure 1

Inoculation with plant growth-promoting rhizobacteria (PGPR) and hormone treatments increase total phenolic compounds content in shoots of M. × piperita plants. Values are fold changes relative to the control. Different letters above bars for PGPR/methyl jasmonte (MeJA) + PGPR/salicylic acid (SA) + PGPR groups indicate significant differences according to the Tukey test (p < 0.05). The letter “a” indicates similar to the control. Three different ANOVA analyses were performed (i) PGPR (yellow box), (ii) SA–SA + PGPR (violet box), (iii) MeJA–MeJA + PGPR (blue box). TPC in control plants: for PGPR treatments = 209.84 ± 13.20 µg/g fresh weight, for SA treatments = 254.03 ± 35.26 µg/g fresh weight, for MeJA treatments = 192.43 ± 16.52 µg/g fresh weight. Native values are given in Supplementary Tables S1 and S2.