| .镉锌处理麦苗对中华稻蝗（Oxya chinensis）体内锌、镉水平及生化指标的影响[J].农业环境科学学报,2013,32(7):. |
| 镉锌处理麦苗对中华稻蝗（Oxya chinensis）体内锌、镉水平及生化指标的影响 |
| Effects of Cadmium and Zinc in Wheat Seedlings on Heavy Metal Accumulation and Biochemical Indices of Oxya chinensis |
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| DOI：10.11654/jaes.2013.07.007 |
| 中文关键词: 中华稻蝗 镉 锌 相互作用 生化指标 |
| 英文关键词: Oxya chinensis cadmium zinc interaction biochemical indices |
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| 摘要点击次数: 2845 |
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| 中文摘要: |
| 为了研究Cd、Zn污染对中华稻蝗生理生化的影响，选用不同浓度Ｃｄ、Ｚｎ溶液（Ｃｄ ０＋Ｚｎ ０，Ｃｄ ２０＋Ｚｎ ０，Ｃｄ ２０＋Ｚｎ ５０，Ｃｄ ２０＋Ｚｎ １００，Ｃｄ ２０＋Ｚｎ ２００）ｍｇ·Ｌ－１培养麦苗饲喂中华稻蝗（Ｏｘｙａ ｃｈｉｎｅｎｓｉｓ）进行慢性染毒，测定麦苗和虫体（４龄若虫）中Ｃｄ与Ｚｎ蓄积量、虫体中丙二醛（ＭＤＡ）含量、超氧化物歧化酶（ＳＯＤ）及谷胱甘肽过氧化物酶（ＧＰｘ）活性和总抗氧化能力（Ｔ－Ａｏｃ）。研究结果显示，在Ｃｄ浓度恒定的情况下，随Ｚｎ处理浓度的增大，麦苗和虫体中Ｚｎ含量显著上升，（Ｃｄ ２０＋Ｚｎ ２００）ｍｇ·Ｌ－１处理组麦苗和虫体Ｚｎ含量分别为对照组的２．０３和１．６３倍；Ｃｄ含量呈先升高后降低趋势，在（Ｃｄ ２０＋Ｚｎ １００）ｍｇ·Ｌ－１处理组达到最高值，分别为１０．４０、４．３５ μｇ·ｇ－１，（Ｃｄ ２０＋Ｚｎ ２００）ｍｇ·Ｌ－１处理组下降到７．３６、３．３５ μｇ·ｇ－１。在Ｃｄ和Ｚｎ联合作用下，随着Ｚｎ浓度的增加，中华稻蝗体内的ＭＤＡ含量升高。ＳＯＤ表现出先升高、后降低的趋势。与对照组相比，Ｃｄ单一处理组ＧＰｘ活性增加，随着Ｚｎ的加入，其ＧＰｘ活性降低。Ｔ－Ａｏｃ在（Ｃｄ ２０＋Ｚｎ １００）ｍｇ·Ｌ－１处理组活性最高。研究结果表明，低浓度Ｚｎ的加入可以增加中华稻蝗对Ｃｄ的富集，Ｃd和Zn的联合作用能够引起中华稻蝗脂质过氧化损伤。 |
| 英文摘要: |
| In order to study the interaction effects of cadimun（Cd） and zinc（Zn）, Oxya chinensis were fed with the wheat seedlings cultured in solutions with different concentrations of Cd2+ and Zn2+. Accumulation of Cd and Zn in the wheat seedlings and the grasshoppers were measured. The content of malondialdehyde（MDA）, superoxide dismutase（SOD） activity, glutathione peroxidase（GPx） activity and total antioxidant capacity（T-Aoc） in the grasshoppers were analyzed. The results showed that Zn contents increased significantly in the seedlings and grasshoppers when Zn concentration was increased and the Cd concentration was constant in solutions. When treated with the mixture of 20 mg·L-1 Cd2+ and 200 mg·L-1 Zn2+, Zn contents in the seedlings and grasshoppers were 2.03 and 1.63 times higher than that in the control, respectively. Cd contents showed a tendency of first increase and then decline, and reached the highest when treated with mixture of 20 mg·L-1 Cd2+ and 100 mg·L-1 Zn2+. The contents of MDA increased in the grasshoppers with Zn concentration increasing under the interaction of Zn and Cd. SOD activity firstly increased then declined. Compared with the control, GPx activity increased when treated with 20 mg·L-1 Cd2+ alone and decreased when treated with the mixture of Cd and Zn. T-Aoc content reached the highest under the treatment of 20 mg·L-1 Cd2+ and 100 mg·L-1 Zn2+. These results indicated that low concentrations of Zn could increase the accumulation of Cd in O. chinensis. The interaction of Zn and Cd could cause the damage of lipid peroxidation. |
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