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| 镉诱导拟南芥根尖过氧化氢积累导致植物根生长抑制 | |
| 引用本文： | 张司南,高培尧,谢庆恩,赵旭华,李 霞.镉诱导拟南芥根尖过氧化氢积累导致植物根生长抑制[J].中国生态农业学报,2010,18(1):136-140. |
| 作者姓名： | 张司南 高培尧 谢庆恩 赵旭华 李 霞 |
| 作者单位： | 1. 兰州大学,兰州,730020 2. 石家庄市外国语学校,石家庄,050000 3. 中国科学院遗传与发育生物学研究所农业资源研究中心,石家庄,050021 |
| 摘 要： | 以模式植物拟南芥为材料研究了植物主根对不同浓度镉胁迫的响应。结果表明,随镉浓度的升高,植物主根生长受到明显抑制,胎盘兰染色表明高剂量的镉造成主根根尖细胞死亡。进一步二氨基联苯胺(DAB)染色发现镉胁迫诱导植物根尖大量积累过氧化氢,而在胁迫培养基中加入维生素C可显著改善植物根的生长、降低过氧化氢积累,并减少镉诱导的根尖细胞死亡。上述结果表明,镉胁迫诱导的拟南芥主根生长抑制很可能是由于根尖细胞过氧化物积累所致。 |
| 关 键 词： | 拟南芥 镉 根生长 维生素C 过氧化物 |
Cadmium-induced root growth inhibition is mediated by hydrogen peroxide production in root tip of Arabidopsis |
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| ZHANG Si-Nan,GAO Pei-Yao,XIE Qing-En,ZHAO Xu-Hua and LI Xia.Cadmium-induced root growth inhibition is mediated by hydrogen peroxide production in root tip of Arabidopsis[J].Chinese Journal of Eco-Agriculture,2010,18(1):136-140. | |
| Authors: | ZHANG Si-Nan GAO Pei-Yao XIE Qing-En ZHAO Xu-Hua and LI Xia |
| Institution: | Lanzhou University, Lanzhou 730020, China;Shijiazhuang Foreign Language School, Shijiazhuang 050000, China;Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Shijiazhuang 050021, China;Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Shijiazhuang 050021, China;Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Shijiazhuang 050021, China |
| Abstract: | Arabidopsis was used as a model plant and the young seedling root response to Cd stress investigated. The study shows that increasing concentrations of Cd inhibits root elongation. Both the meristematic and elongation zones are severely truncated, suggesting some degree of impact on cell division and elongation. Plant roots die under Cd overdose. DAB staining analysis shows hydrogen peroxide (H2O2) accumulation in root tips when seedlings are treated with Cd. Furthermore, vitamin C (Vc) dramatically increases seedling tolerance to Cd treatment. Put together, the results demonstrate that Cd-inhibited root growth is likely caused by reduced meristematic and elongation cell division, mediated by ROS (reactive oxygen species) production. |
| Keywords: | Arabidopsis thaliana Cadmium Root growth Vitamin C Hydrogen peroxide |
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