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. 2017 Mar 20;12(3):e0173957. doi: 10.1371/journal.pone.0173957

Fig 1. Toxicity effects of DEHP on biochemical properties of E. fetida in the spiked soil test.

Fig 1

(a) total protein content; (b) SOD activity; (c) POD activity; and (d) MDA content were determined after treatment for 7, 14, 21 and 28 d in spiked natural soil CK, H-1, H-2, H-3, and H-4 (n = 4; error bars, SEM/mean value of standard errors). The spiked concentrations of DEHP were 0, 1, 3, 9 and 27 mg kg-1 soil. Asterisks show significant differences at p<0.05 level compared to the control; double asterisks show significant differences at p<0.01 level compared to the control (S1 Data).