FIG 4.

Volcano plot analyses of 1,292 P. stutzeri proteins (a) and 1,541 Dietzia sp. proteins (b) identified in coculture triplicates and pure culture triplicates of the two strains by label-free proteomics analysis. In each diagram, the hollowed diamonds below the horizontal dashed line indicate undifferentially expressed proteins in the two treatments (P > 0.05), and the solid diamonds above the dashed line represent differentially expressed ones (P < 0.05), of which erythrine represents high-level upregulated proteins (fold change > 2), pale red represents low-level upregulated proteins (1 < fold change < 2), pale blue represents low-level downregulated proteins (0.5 < fold change < 1), and royal blue represents high-level downregulated proteins (fold change < 0.5).