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

Table 2 Correlation analysis between antioxidant enzyme activities and Cd or As contents

Antioxidant enzyme	3 mg kg⁻¹ Cd		120 mg kg⁻¹ As		3 mg kg⁻¹ Cd + 120 mg kg⁻¹ As
Antioxidant enzyme	Cd contents	As contents	Cd contents	As contents	Cd contents	As contents
MDA	-0.346^a	-0.710^b	-0.308^a	-0.330^a	-0.334^a	-0.373^b
POD	0.275	-0.197	0.589^b	0.733^b	0.585^b	0.546^b
SOD	-0.349^a	-0.670^b	-0.349^a	-0.381^b	-0.392^b	-0.471^b
CAT	-0.603^b	-0.571^b	-0.616^b	-0.501^b	-0.488^b	-0.528^b

Note: ^aIndicates significant differences at P < 0.05 level, n = 48. ^bIndicates highly significant differences at P < 0.01 level, n = 48. The same as below

ISSN: 1471-2229