Intercropping of Gramineous Pasture Ryegrass (Lolium perenne L.) and Leguminous Forage Alfalfa (Medicago sativa L.) Increases the Resistance of Plants to Heavy Metals

Table 7

Pearson correlation matrix among heavy metal concentrations, oxidative damages, and enzymatic activities in plants.

	Pb	Cd	Zn	MDA	O2^·−	H2O2	POD	CAT	APX
Pb	1
Cd	0.281	1
Zn	0.501	−0.197	1
MDA	0.588	0.768	−0.082	1
O2^·−	0.694	0.166	0.209	0.637	1
H2O2	0.894	0.104	0.520	0.472	0.753	1
POD	−0.271	0.500	−0.843	0.336	0.183	−0.326	1
CAT	−0.263	−0.218	−0.175	−0.539	−0.535	−0.321	0.070	1
APX	−0.552	−0.491	0.042	−0.836	−0.775	−0.671	−0.136	0.591	1

Note. Correlation is significant at (two-tailed); correlation is significant at (two-tailed).