Responses of antioxidant enzymes and key resistant substances in perennial ryegrass (Lolium perenne L.) to cadmium and arsenic stresses

Table 3 Correlation analysis between key substances, related enzyme activities and contents of As and Cd

Parameters	3 mg kg⁻¹ Cd		120 mg kg⁻¹ As		3 mg kg⁻¹ Cd + 120 mg kg⁻¹As
Parameters	Cd contents	As contents	Cd contents	As contents	Cd contents	As contents
NPT	0.466**	0.096	0.317*	0.447**	0.528**	0.437**
GSH	0.664**	0.616**	0.483**	0.425**	0.621**	0.604**
PCs	-0.202	-0.520**	-0.328*	-0.006	-0.293*	-0.374**
γ-ECS	0.478**	-0.018	0.594**	0.656**	0.582**	0.572**
GSS	0.168	-0.300*	0.225	0.534**	0.120	0.028
PCSase	0.260	-0.136	0.120	0.076	0.605**	0.605**
AR	0.120	-0.293*	0.451**	0.633**	0.547**	0.491**

ISSN: 1471-2229