马络葵对镉的吸收累积特征及对镉胁迫的生理响应
Accumulation Features of Malope trifida to Cadmium and the Physiological Response to Cadmium Stress
陈厚蓉 1王春玲 1冯静静 1胡启慧 1潘春香 1庞琢2
作者信息
- 1. 韶关学院英东农业科学与工程学院,广东韶关 512005
- 2. 呼和浩特市土壤肥料工作站,内蒙古呼和浩特 010020
- 折叠
摘要
[目的]探讨马络葵对镉的吸收累积特征及对镉胁迫的生理响应,为利用马络葵对镉污染土壤进行植物修复提供理论依据.[方法]以马络葵为材料,采用砂培方法,设计0、0.5、1.0、2.0、3.0、4.0 mg/L 6个镉浓度处理,研究马络葵对镉胁迫的生理响应及对镉的吸收累积和运转能力.[结果]镉处理后,马络葵株高和地上部鲜重均显著高于CK;地上鲜重和根系鲜重均以3.0 mg/L浓度时最大;镉浓度低于1.0 mg/L时,有利于叶绿素含量合成;可溶性糖含量均显著高于CK,可溶性蛋白质含量除0.5 mg/L镉处理外,其他浓度镉处理均显著高于CK.[结论]马络葵地上部和根系对镉的吸收累积均随着镉浓度增大呈增加趋势,且镉运转能力和对镉的耐受性较强,可在镉污染土壤中种植利用,并作为土壤重金属污染修复植物进一步研究.
Abstract
[Objective] Accumulation features of Malope trifida to cadmium and the physiological response to cadmium stress were studied to provide theoretical basis for the phytoremediation of cadmium pollution in soil by Malope trifida.[Method] We applied Malope trifida as material, used the sand culture method and designed six different concentrations (0, 0.5, 1.0, 2.0, 3.0 and 4.0 mg/L) of Cd to study the physiological effect of Malope trifida to the stress of heavy metal Cd and its accumulation and operation ability to Cd.[Result] The plant height and the above-ground fresh weight were all higher than CK, the above-ground fresh weight and the root fresh weight were the highest under the concentration of 3.0 mg/L;when the concentration was lower than 1.0 mg/L, the chlorophyll content was easy to synthetize;the contents of soluble sugar were all higher than CK, and the contents of soluble protein were all higher than CK except when the concentration was 0.5 mg/L.[Conclusion] The accumulation of above-ground part and root of Malope trifida to Cd showed the increasing trend with the improvement of Cd concentration, the operation ability of Cd and the tolerance ability to Cd were strong.So that the Malope trifida can be planted in the Cd contaminated soils and can be treated as the pollution remediation plants of heavy metal damage to do further research.
关键词
马络葵/镉/生理响应/富集Key words
Malope trifida/Cadmium/Physiological effect/Accumulation引用本文复制引用
基金项目
内蒙古自治区科技计划项目(201502052)
广东省大学生创新训练计划建设项目(201410576030)
出版年
2017
国家科技期刊平台
NSTL
维普
万方数据