西北师范大学学报（自然科学版）2024，Vol.60Issue(4)：35-41,7.DOI:10.16783/j.cnki.nwnuz.2024.04.004
LED3A强化黑麦草对水体中Cu的耐性积累及提取效果研究
Tolerant accumulation and extraction of Cu from contaminated water by ryegrass under LED3A enhanced remediation
摘要
Abstract
This work examined the effects of N-dodecyl ethylenediamine triacetate(LED3 A)on ryegrass growth,antioxidative responses,Cu subcellular content and distribution,as well as the efficacy of LED3A-enhanced Cu extraction by plants.The results indicated that the application dosages of LED3A produce slight impact on ryegrass biomass.With the increase of LED3A concentration,the activities of superoxide dismutase(SOD),peroxidase(POD)and catalase(CAT)of ryegrass first increase and then decrease,while the contents of superoxide anion(O2-·),hydrogen peroxide(H2 O2)and malondialdehyde(MDA)first decrease and then increase,due to enhancing its antioxidant defense system,which facilitates the removal of reactive oxygen species(ROS)and reduces oxidative stress.LED3A significantly promotes the uptake and accumulation of Cu in ryegrass and affects the distribution of Cu in cell walls and vesicles.Compared to L0,Cu+LED3A treatments(L10 to L200)result in an increase of Cu content in roots,stems and leaves by 10.39％to 44.25％and 2.33％to 18.81％,respectively.The total Cu accumulation of the plant is increased correspondingly by 11.64％to 37.79％.At the optimal dosage of LED3A,the removal efficiency of Cu is reached 76.00％.LED3A can promote the extraction and tolerance accumulation of Cu in ryegrass through chelation-induced mechanisms,and effectively increase the remediation efficiency of Cu by plants.关键词
LED3A/黑麦草/强化植物修复/CuKey words
LED3A/ryegrass/assisted phytoremediation/Cu分类
资源环境引用本文复制引用
闫利甜,刁静茹,董葛军,肖奇赞..LED3A强化黑麦草对水体中Cu的耐性积累及提取效果研究[J].西北师范大学学报（自然科学版）,2024,60(4):35-41,7.基金项目
国家自然科学基金资助项目(41261077) （41261077）
甘肃省高等学校创新基金项目(2021B-102) （2021B-102）
