对硫磷胁迫下锰对中华米虾SOD活性的影响

研究对硫磷胁迫下,饲料中添加适量的锰对中华米虾(Caridina denticulata sinensis)超氧化物歧化酶(SOD)活性的影响.结果表明,对硫磷对中华米虾的24,48,72和96 h的半致死质量浓度(LC50)分别为15.00,8.20,6.83和4.60 μg/L.中华米虾有锰组和无锰组在不同质量浓度对硫磷(0～4.60 μg/L)的胁迫下,SOD活力受到明显影响,均呈现先升高后降低的趋势,饲料中添加有适量锰(150 μg /g)的实验组米虾SOD的活力要高于对照组米虾SOD的活力.可见,饲料中添加适量的锰可提高中华米虾SOD的活性,有益于提高虾体抗氧化的能力,增强虾体对环境胁迫的耐受力.

Effects of Dietary Mn Supplementation on the Superoxide Dismutase(SOD) of Caridina denticulata sinensis Exposed to Parathion

The effects of dietary Mn supplementation on the superoxide dismutase(SOD) of Caridina denticulata sinensis exposed to parathion were investigated.The results showed that the 24,48,72 and 96 h LC50 values of parathion were 15.00,8.20,6.83 and 4.60 μg/ L.With the increasing of parathion concentration(from 0 to 4.60 μg/ L),the activities of SOD all rised firstly and then went down.Moreover,the SOD activities of shrimps fed a Mn-supplemented diet of 150 μg /g were significantly higher than those fed a control diet.Thus,an appropriate Mn-supplemented diet can raise the antioxidant capacity of C.d.sinensis and inprove it's tolerance to the environmental stress.