Extended Data Fig. 3: The influences of exposure frequency, removing and legacy time on PSFs.

a–c, Shoot biomass (a), larval weight gain (b) and leaf damage (c) of wild-type maize plants growing in soils of Con- or HAC-exposed receiver plants. The HAC exposure frequency over different consecutive days was indicated. Data are presented as mean + SEM. The exact number of biological replicates is indicated on each bar. Data points represent individual replicate samples. Asterisks denote significant differences between treatments (ANOVA followed by pairwise comparisons of FDR-corrected LSMeans, *P < 0.05; ***P < 0.001). d–f, Shoot biomass (d), larval weight gain (e) and leaf damage (f) of wild-type maize plants growing in soils of Con- or HAC-exposed receiver plants. The soils were left in greenhouse with different days after removing the receiver plants. Data are presented as mean + SEM. The exact number of biological replicates is indicated on each bar. Data points represent individual replicate samples. Asterisks denote significant differences between treatments (ANOVA followed by pairwise comparisons of FDR-corrected LSMeans, *P < 0.05; **P < 0.01; ***P < 0.001). g–i, Shoot biomass (g), larval weight gain (h) and leaf damage (i) of wild-type maize plants growing in soils of Con- or HAC-exposed receiver plants which were removed at different times after exposure. Data are presented as mean + SEM. The exact number of biological replicates is indicated on each bar. Data points represent individual replicate samples. Asterisks denote significant differences between treatments (ANOVA followed by pairwise comparisons of FDR-corrected LSMeans, *P < 0.05; **P < 0.01; ***P < 0.001). Raw data and exact P values for all comparisons in this figure are provided in the Source Data.