Heavy metal remediation in soil with chemical amendments and its impact on activity of antioxidant enzymes in Lettuce (Lactuca sativa) and soil enzymes

Applied Biological Chemistry

Table 3 Correlation analysis between heavy metal concentration and biochemical properties in soil

	pH	EC	OM	P₂O₅	Cd_Soil	Pb_Soil	Cd_Plant	Pb_Plant	CAT	GR	APX	GLY	PHOS
pH	1.000
EC	0.029	1.000
OM	−0.035	0.682**	1.000
P2O5	0.475**	−0.006	0.062	1.000
Cd_Soil	0.058	0.287	0.115	0.046	1.000
Pb_Soil	0.654**	0.195	0.162	0.827**	0.126	1.000
Cd_Plant	−0.060	−0.361	−0.354	0.436*	−0.308	0.184	1.000
Pb_Plant	0.078	−0.301	−0.049	0.507**	−0.243	0.417*	0.586**	1.000
CAT	0.048	0.232	0.306	0.247	0.025	0.116	0.052	−0.094	1.000
GR	−0.044	−0.060	0.098	−0.217	−0.333	−0.178	0.005	−0.042	−0.082	1.000
APX	−0.012	−0.080	0.135	0.033	0.135	−0.113	−0.147	−0.078	0.180	−0.128	1.000
GLY	0.366*	0.120	−0.036	0.070	0.181	0.167	−0.289	−0.167	0.188	−0.072	0.190	1.000
PHOS	−0.644**	−0.186	−0.140	−0.559**	−0.234	−0.753**	0.074	−0.196	−0.140	0.330	0.344	−0.163	1.000

All value is an average of triplicated measurement
CAT catalase, APX ascorbate peroxidase, GR glutathione reductase (GR), GLY β-glucosidase, PHOS phosphatase
* (p < 0.05)
** (p < 0.01) indicates that measured value is significantly different in varied parameters