Table 2: Acetylcholinesterase (AChE) activity (nmol hydrolysed acetylthiocholine iodide*min−1*mg−1 protein), S-glutathione transferase (GST) activity (μmol CDNB*min−1*mg−1 protein), and catalase (CAT) activity (mmol decomposed H2O2*min−1*mg−1 protein) in the intestinal tract and body wall of Eisenia fetida exposed to nickel (Ni groups), pesticide (P group), and nickel and pesticide administered jointly (NiP group).

AChEGSTCAT
GroupGastrointestinal tractBody wallGastrointestinal tractBody wallGastrointestinal tractBody wall
Mean ± SD ( )Mean ± SD ( )Mean ± SD ( )Mean ± SD ( )Mean ± SD ( )Mean ± SD ( )

K149,44 ± 12,59bc (6)130,09 ± 11,21abc (7)0,025 ± 0,004a (7)0,022 ± 0,003a (8)0,085 ± 0,019bc (7)0,019 ± 0,002a* (7)
P70,61 ± 9,59a (6)80,59 ± 8,59a (6)0,042 ± 0,005a (9)0,031 ± 0,005abc* (6)0,074 ± 0,020ab (8)0,048 ± 0,011c* (8)
Ni300162,35 ± 22,99bc (7)152,44 ± 24,17bc (5)0,059 ± 0,006ab (6)0,024 ± 0,004ab* (6)0,039 ± 0,008a (6)0,024 ± 0,003ab* (5)
Ni300P133,04 ± 19,51abc (7)111,24 ± 14,33ab (5)0,084 ± 0,007b (5)0,035 ± 0,006c* (5)0,083 ± 0,011bc (6)0,040 ± 0,008c* (7)
Ni900179,82 ± 29,19c (6)183,26 ± 30,76c (7)0,078 ± 0,010b (7)0,032 ± 0,005bc* (4)0,076 ± 0,023ab (7)0,031 ± 0,005abc* (6)
Ni900P124,07 ± 9,83ab (5)151,87 ± 18,50bc* (5)0,087 ± 0,019b (6)0,048 ± 0,011c* (5)0,131 ± 0,028c (6)0,037 ± 0,007bc* (5)

Abbreviations are explained in Section 2. The same superscript letters show the homogeneity of compared groups (in columns), according to the ANOVA statistics. Asterisk *indicates the statistically significant difference between intestinal tract and body wall.