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. 2020 Jul 20;8(7):1080. doi: 10.3390/microorganisms8071080

Figure 3.

Figure 3

Prevention of Verticillium wilt on young olive trees by Bacillus velezensis XT1. (a) PCR amplification of Verticillium dahliae in olive tree leaves. 1: Infected non-treated control, 2: infected B. velezensis XT1-treated plants 30 days after infection, 3: infected B. velezensis XT1-treated plants 90 days after infection, 4: molecular weight ladder. (b) Polyphenol oxidase (PPO) activity. Leaves of infected non-treated olive trees were used as control. (c) Incidence rate of infected non-treated control and infected XT1-treated olive trees. (d) Percentage of severity of infected non-treated control and infected XT1-treated olive trees. (e) Transversal cut of infected non-treated control and infected XT1-treated olive tree branches. (f) Whole plant aspect of infected non-treated control and infected XT1-treated trees. Significant differences with the control are indicated by asterisks (**, p < 0.01; ***, p < 0.001).