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. 2018 Mar 21;8:4929. doi: 10.1038/s41598-018-23406-2

Figure 5.

Figure 5

Principal component analysis of Bacillus (a) and Pseudomonas (b) spp. communities in cucumber rhizosphere soils based on PCR-DGGE analysis. W represents cucumber rhizosphere soils treated with water. 0.02, 0.05, 0.1 and 0.2 represent cucumber rhizosphere soils treated with vanillic acid at 0.02, 0.05, 0.1, 0.2 μmol g−1 soil concentrations, respectively.