铈对镉染毒泥鳅肝胰脏中超氧化物歧化酶和过氧化物酶活性的影响

将泥鳅随机分为空白对照组;低(0.025 mg/L)、中(0.25 mg/L)、高(2.5 mg/L)剂量 Ce~(3+)染毒组;低(0.025 mg/L)、中(0.25 mg/L)、高(2.5 mg/L)剂量Cd~(2+)染毒组;低(0.025 mg/L Cd~(2+)+0.025 Ce~(3+))、中(0.25 mg/L Cd~(2+)+0.25 mg/L Ce~(3+))、高(2.5 mg/L Cd~(2+)+2.5 mg/L Ce~(3+))剂量联合染毒组,每组60尾.分别于第1、2、3、5、7、10 d测定肝脏中SOD和POD的活性.结果表明:低剂量 Ce~(3+)染毒组SOD、POD活性显著高于对照组(P＜0.05或P＜0.01),中剂量 Ce~(3+)染毒组SOD活性前3 d高于对照组,自5 d开始低于对照组(P＜0.05或P＜0.01),高剂量 Ce~(3+)染毒组SOD活性前2 d显著高于对照组,从第3 d开始显著低于对照组(P＜0.05或P＜0.01),中、高剂量 Ce~(3+)染毒组POD活性前5 d高于对照组,从第7 d开始低于对照组(P＜0.05或P＜0.01);低剂量Cd~(2+)染毒组SOD、POD活性显著高于对照组(P＜0.05或P＜0.01);中剂量Cd~(2+)染毒组SOD活性前7 d高于对照组,第10 d开始低于对照组,中剂量Cd~(2+)染毒组POD活性始终高于对照组(P＜0.05);高剂量Cd~(2+)染毒组SOD活性前2 d高于对照组,从第5 d开始低于对照组,高剂量Cd~(2+)染毒组POD活性前2 d高于对照组,从第3 d开始低于对照组(P＜0.05或P＜0.01).低、中剂量联合染毒量组SOD、POD活性显著高于对照组,高剂量联合染毒组SOD、POD活性显著低于对照组(P＜0.01). Ce~(3+)在低质量浓度下可以提高泥鳅体内SOD、POD活性,高质量浓度下则抑制SOD、POD活性.

The Effect of Cerium on SOD and POD Activities in Hepatopancreas of Oriental Weatherfish(Misgurnus anguillicaudatus)Stressed by Cadmium

The effects of cerium on activities of superoxide dismutase(SOD),and peroxidase(POD)in hepatopancreas of oriental weatherfish(Misgurnus anguillicaudatus)stressed by various cadmium levels.The fish were randomly divided into control group and experimental groups and exposed to solely Ce3+ at a rate of 0.025,0.25 and 2.5mg/L,solely Cd2+ at a rate of 0.025,0.25 and 2.5mg/L,and both Cd2+ and Ce3+ at a rate of 0.025 mg/L Cd2++0.025 Ce3+,0.25 mg/L Cd2++0.25 mg/L Ce3+and 2.5 mg/L Cd2++2.5 mg/L Ce3+.The activities ...