Fig. 3
From: Effects of polystyrene nanoparticles on the microbiota and functional diversity of enzymes in soil
Mean (± SE, n = 5) of extracellular enzyme activity A leucin-aminopeptidase, B cellobiohydrolase, C 1,4-β-glucosidase, and D alkaline phosphatase under different PS-NP concentrations of 10 (PSNP-10), 100 (PSNP-100), and 1000 (PSNP-1000) μg kg−1 dry soil at three time points during 28 days of incubation. Significant differences between the treatments are indicated by different letters (ANOVA and post hoc Tukey-B test; p < 0.05)