《Table 1 PAE residue in pepper pot soil 30 d after treatment》

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《尖孢镰刀菌PO-Yi对蔬菜土壤中邻苯二甲酸酯的降解作用（英文）》

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mg/kg

In this research，we polluted the soil samples with PAEs at three gradients:low（L），middle（M），and high（H）level.More specifically，PAEs were added to the soil samples at a rate of 0，10，and 20 mg/kg，respectively.Low level PAE pollution corresponded to the original soil without the addition of PAEs.As the background concentration of PAE pollutants in the original soil samples was lower than 0.05 mg/kg，and no PAEs were detected，the preexisting content of PAEs in the soil samples was seen as negligible.New soil samples were collected from the pots 30 d after PO-Yi treatment to test the PAE residue（Table1）.The results showed that PO-Yi，to some extent，can accelerate the degradation of PAEs in the soil.For the PO-Yi treated samples，the total PAE degradation rate reached 76.8%and 57.8%in pepper soil with middle and high level PAE pollution，respectively.These degradation rates showed a significant increase in comparison with the PO-Yi-free soil samples.Particularly，the total degradation rate of soil with middle and high level PAE pollution had increased by16.7%and 25.3%，respectively.The data proved that PO-Yi not only has a competitive growth advantage，but also presents good degradation performance when combining with other microorganisms in the soil.This collaborative advantage is quite evident in highlypolluted soil.The highest absolute degradation rate was found in DEP-polluted soil；in highly-polluted soil，this value reached up to 39.5%，which was 14.2%higher than that in soil with middle level DEP pollution（Fig.1）.For the removal rate of various PAEs（Fig.2），we had DEHP>DMP>DEP>BBP>DBP>DIBP in middle-level polluted soil and DEHP>DMP>BBP>?DEP>DIBP>DBP in highly-polluted soil，the highest removal rate occurred in DEHP-polluted soil samples，which was 95%.To conclude，microorganisms present certain selection priority when degrading compound PAEs.There was also some decrease of PAE contents in the PO-Yi-free soil samples，indicating the potential existence of microorganisms capable of degrading PAE pollutants.These microorganisms can form a specific PAE degradation product food chain with PO-Yi to stimulate the effective degradation of PAEs.Besides，the plants themselves could also absorb and degrade some PAEs.