维普中文期刊产品整合服务

Interactions of zinc and cadmium toxicity in their effects on growth and in antioxidative systems in tomato plants (Solanum lycopersicum)

查看全文 作　　者：Jaouhra [1]Cherif;Chamseddine [2]Mediouni;Wided Ben [2]Ammar;Fatma [2]Jemal 高影响力作者 机构地区：[1]Unit of Research 'Nitrogenized Nutrition and Metabolism and Stress Proteins' UR 99/09-20,Department of Biology,Faculty of Science, University of Tunis Tunis 2092, Tunisia;[2]Unit of Research 'Nitrogenized Nutrition and Metabolism and Stress Proteins' UR 99/09-20,Department of Biology,Faculty of Science,University of Tunis Tunis 2092, Tunisia高影响力机构 出　　处：《Journal of Environmental Sciences》索引2011年第23卷第5期,共8页高影响力期刊 摘　　要：The interaction between zinc and cadmium was investigated in tomato plants (Solanum lycopersicum). Ten-day-old seedlings were treated with 10 μmol/L CdCl 2 associated to different concentrations of ZnCl 2 (10, 50, 100, and 150 μmol/L). Zn supply clearly reduced Cd accumulation in leaves and simultaneously increased Zn concentration. Cd induced oxidative stress in leaves as indicated by an increase in thiobarbituric acid-reactive substances (TBARS) level and chlorophyll breakdown. Furthermore, compared with control, Cd-treated plants had significantly higher activities of superoxide dismutase (SOD, EC 1.15.1.1), whereas, catalase (CAT, EC 1.111.1.6), ascorbate peroxidase (APX, EC 1.11.1.11), and glutathione reductase (GR, EC 1.6.4.2) activities were significantly suppressed by Cd addition. Zn supplementation, at low level, restored and enhanced the functional activity of these enzymes (SOD, CAT, APX and GR) as compared to Cd-alone-treated plants. The beneficial effect of adequate Zn level on Cd toxicity was confirmed by a significant decrease in TBARS level and restoration of chlorophyll content. However, when Zn was added at high level in combination with Cd there was an accumulation of oxidative stress, which was higher than that for Cd or excess Zn alone treatments. These results suggested that higher Zn concentrations and Cd are synergistic in their effect on plant growth parameters and oxidative stress. 关 键 词：锌浓度 镉积累 相互作用 抗氧化系统 经济增长 毒性 植株 番茄
相关文献

参考文献(38)

引证文献(19)

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1　渝公网安备 50019002500403号　违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费