| 外源硒对萘胁迫下车前草生长及土壤修复能力的影响 |
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| 引用本文： | 朱灿,刘慧刚,顾彦,席颖,任东,黄应平.外源硒对萘胁迫下车前草生长及土壤修复能力的影响[J].农业环境科学学报,2019,38(11):2511-2519. |
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| 作者姓名： | 朱灿 刘慧刚 顾彦 席颖 任东 黄应平 |
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| 作者单位： | 三峡大学水利与环境学院, 湖北 宜昌 443002;湖北省农田监测工程技术中心, 三峡大学, 湖北 宜昌 443002;三峡库区生态环境教育部工程研究中心, 三峡大学, 湖北 宜昌 443002,湖北省农田监测工程技术中心, 三峡大学, 湖北 宜昌 443002;三峡库区生态环境教育部工程研究中心, 三峡大学, 湖北 宜昌 443002,三峡大学水利与环境学院, 湖北 宜昌 443002;湖北省农田监测工程技术中心, 三峡大学, 湖北 宜昌 443002;三峡库区生态环境教育部工程研究中心, 三峡大学, 湖北 宜昌 443002,湖北省农田监测工程技术中心, 三峡大学, 湖北 宜昌 443002;三峡库区生态环境教育部工程研究中心, 三峡大学, 湖北 宜昌 443002,湖北省农田监测工程技术中心, 三峡大学, 湖北 宜昌 443002;三峡库区生态环境教育部工程研究中心, 三峡大学, 湖北 宜昌 443002,三峡大学水利与环境学院, 湖北 宜昌 443002;湖北省农田监测工程技术中心, 三峡大学, 湖北 宜昌 443002;三峡库区生态环境教育部工程研究中心, 三峡大学, 湖北 宜昌 443002 |
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| 基金项目： | 国家重点研发计划项目（2016YFD0800902）；湖北省创新群体滚动项目（2015CFA021）；湖北省农田环境监测工程技术中心开放基金（201605，201606） |
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| 摘 要： | 为研究土壤多环芳烃植物修复技术,以萘为典型低分子量多环芳烃代表性污染物,选取车前草(Plantago asiatica L.)为潜在的修复治理植物,通过盆栽模拟试验,探讨外源硒的添加(0.2 mg·kg-1)对萘污染(0、50、200、800 mg·kg-1)条件下的车前草生长、生理特征及土壤修复效果的影响。研究结果显示,在不同浓度萘作用下,车前草生物量、根系形态(根表面积、根体积、根尖数、平均直径)和萘的去除率随土壤萘含量的增加而降低,根部丙二醛(MDA)、谷胱甘肽(GSH)含量和过氧化氢酶(CAT)活性则升高。硒的加入缓解了萘的胁迫作用,使得植物生物量和根系形态较无硒组增加了10.7%以上,MDA含量降低了8.4%～15.8%,过氧化氢酶(CAT)活性提高了4.0%～13.4%,谷胱甘肽(GSH)含量增加了13.1%～33.3%,土壤萘的去除率提高了0.5%～11.6%。结果表明,土壤中的萘抑制了车前草的生长,降低了其对萘的修复效率,而适量浓度的硒可以缓解萘对车前草胁迫,提高其对萘的耐受性,从而增强车前草的植物修复效率。
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| 关 键 词： | 硒 萘 车前草 生长 生理指标 植物修复 |
| 收稿时间： | 2019/4/18 0:00:00 |
Effects of selenium on the growth and phytoremediation efficiency of Plantago asiatica L. in soil exposed to naphthalene |
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| ZHU Can,LIU Hui-gang,GU Yan,XI Ying,REN Dong and HUANG Ying-ping.Effects of selenium on the growth and phytoremediation efficiency of Plantago asiatica L. in soil exposed to naphthalene[J].Journal of Agro-Environment Science( J. Agro-Environ. Sci.),2019,38(11):2511-2519. |
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| Authors: | ZHU Can LIU Hui-gang GU Yan XI Ying REN Dong and HUANG Ying-ping |
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| Institution: | College of Hydraulic&Environmental Engineering, China Three Gorges University, Yichang 443002, China;Hubei Engineering Technology Research Center for Farmland Environment Monitoring, China Three Gorges University, Yichang 443002, China;Engineering Research Center of Eco-environment in Three Gorges Reservoir Region, Ministry of Education, China Three Gorges University, Yichang 443002, China,Hubei Engineering Technology Research Center for Farmland Environment Monitoring, China Three Gorges University, Yichang 443002, China;Engineering Research Center of Eco-environment in Three Gorges Reservoir Region, Ministry of Education, China Three Gorges University, Yichang 443002, China,College of Hydraulic&Environmental Engineering, China Three Gorges University, Yichang 443002, China;Hubei Engineering Technology Research Center for Farmland Environment Monitoring, China Three Gorges University, Yichang 443002, China;Engineering Research Center of Eco-environment in Three Gorges Reservoir Region, Ministry of Education, China Three Gorges University, Yichang 443002, China,Hubei Engineering Technology Research Center for Farmland Environment Monitoring, China Three Gorges University, Yichang 443002, China;Engineering Research Center of Eco-environment in Three Gorges Reservoir Region, Ministry of Education, China Three Gorges University, Yichang 443002, China,Hubei Engineering Technology Research Center for Farmland Environment Monitoring, China Three Gorges University, Yichang 443002, China;Engineering Research Center of Eco-environment in Three Gorges Reservoir Region, Ministry of Education, China Three Gorges University, Yichang 443002, China and College of Hydraulic&Environmental Engineering, China Three Gorges University, Yichang 443002, China;Hubei Engineering Technology Research Center for Farmland Environment Monitoring, China Three Gorges University, Yichang 443002, China;Engineering Research Center of Eco-environment in Three Gorges Reservoir Region, Ministry of Education, China Three Gorges University, Yichang 443002, China |
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| Abstract: | Pollution by polycyclic aromatic hydrocarbons(PAHs) is emerging as an acute global environmental issue. High-level contamination by PAHs can limit phytoremediation efficiency. In this work, naphthalene and Plantago asiatica L. were selected as a typical lowmolecular-weight PAH pollutant and a potential remediation plant, respectively. The effects of an exogenous substance, i.e., selenium(Se, 0.2 mg·kg-1), on the growth, physiological characteristics, and soil remediation efficiency of P. asiatica L. under exposure to different concentrations of naphthalene(0, 50, 200, and 800 mg·kg-1) were studied using pot simulation experiments. The results showed that biomass, root morphology(root surface area, root volume, root node number, and root mean diameter), and naphthalene removal efficiency decreased with an increase in naphthalene concentration in soil, whereas malondialdehyde(MDA) and glutathione(GSH) content and catalase(CAT) activity in the root increased. The addition of Se alleviated the stress of naphthalene and increased biomass and root morphogenesis by more than 10.7%, decreased MDA content by 8.4%~15.8%, and increased CAT activity by 4.0%~13.4% and GSH content by 13.1%~33.3% compared with the Se-free group. Selenium supplementation in the soil also increased PAH phytoremediation after 60 days of plant growth, and the removal ratio of naphthalene in the soil tended to rise by 0.5%~11.6% under different levels of naphthalene stress. A low concentration of Se enhanced plant tolerance toward naphthalene exposure by an alleviation of oxidative stress and an increase in biomass. Thus, the addition of Se is a good strategy for the phytoremediation of soils contaminated by PAHs in the field. |
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| Keywords: | selenium naphthalene Plantago asiatica L growth physiological indexes phytoremediation |
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