Table 4: Mean and standard deviation for micronuclei in cells of the meristematic region (M) and F1 of Allium cepa after exposure to control soil, negative and positive controls, and biosolid samples.

Samples    F1 M F1 NC 0.2 ± 0.44 0.2 ± 0.44 0.6 ± 0.54 0.2 ± 0.44 Controls CS 0.6 ± 0.54 0 0 0.2 ± 0.44 MMS 21.2 ± 7.08*1 4.6 ± 2.07*1 20.6 ± 5.12*1 4.6 ± 0.89*1 TRIF 12.2 ± 3.42*1 2.6 ± 1.14* 3.6 ± 0.89*1 2.6 ± 0.89*1 Raw B 0.14 ± 0.14 0.05 ± 0.04 NA NA Combination SB 1 ± 1 0.6 ± 0.54 0.4 ± 0.54 0

NC: negative control; CS: control soil; MMS: positive control; TRIF: positive control; B: raw biosolid sample; SB: soil + biosolid. : time of mixing and : after 30 days of exposure to the diplopods. *Statistically significant values when compared to the negative control, by Mann-Whitney test, . 1Statistically significant values when compared to the control soil, by Mann-Whitney test, . 2Statistically significant values when compared to the same treatments at 0 and 30 days. NA: not available.