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

Figure 4.

Figure 4

Inoculation with PGPR and hormone treatments increases pulegone concentration in shoots of M. × piperita plants. Values are fold changes relative to the control. Different letters above bars for PGPR, MeJA + PGPR, 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). Pulegone concentrations in control plants: for PGPR treatments = 3.74 ± 0.16 μg/g fw, for SA treatments = 4.27 ± 0.27 μg/g fw, for MeJA treatments = 3.99 ± 0.28 μg/g fw.