| 肠杆菌对蓼科植物镉砷污染土壤修复机理研究 |
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| 引用本文： | 李艺,王炳森,黄媛媛,姚亚威,林嘉敏,刘可慧,于方明.肠杆菌对蓼科植物镉砷污染土壤修复机理研究[J].农业环境科学学报,2020,39(2):304-312. |
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| 作者姓名： | 李艺 王炳森 黄媛媛 姚亚威 林嘉敏 刘可慧 于方明 |
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| 作者单位： | 广西师范大学珍稀濒危动植物生态与环境保护教育部重点实验室,广西 桂林 541004;广西师范大学环境与资源学院,广西桂林541004;广西师范大学环境与资源学院,广西桂林541004;广西师范大学珍稀濒危动植物生态与环境保护教育部重点实验室,广西 桂林 541004;广西师范大学生命科学学院,广西 桂林 541004 |
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| 基金项目： | 国家自然科学基金项目（41967019，41907096，41661077）；国家重点研发计划项目（2017YFD0801500）；广西创新驱动发展专项项目（桂科AA17204047-3）；广西自然科学基金项目（2018JJA150018） |
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| 摘 要： | 通过盆栽试验研究了接种不同浓度肠杆菌对镉-砷复合污染土壤上蓼科植物水蓼(Polygonum hydropiper L.)和酸模叶蓼(Polygonum lapathifolium L.)生长、镉砷富集及抗氧化酶系统和非酶系统的影响。结果发现:接种肠杆菌显著提高水蓼和酸模叶蓼株高、株质量及叶片中叶绿素和类胡萝卜素的含量。当接种浓度为3.4×107CFU g-1土时,水蓼和酸模叶蓼根际土壤pH降低了0.35个和0.28个单位,根茎叶中的镉和砷含量分别为对照的1.64~2.74倍和1.21~2.51倍。接种肠杆菌还可以提高叶片中SOD、POD和CAT的活性以及GSH和PCs的含量,降低O-2和MDA的含量,缓解重金属的毒害。结果表明,接种肠杆菌能通过提高植株抗氧化酶活性来减轻镉砷富集对水蓼和酸模叶蓼的胁迫,从而提高水蓼和酸模叶蓼对镉-砷复合污染土壤的修复效率。
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| 关 键 词： | 水蓼 酸模叶蓼 肠杆菌 镉 砷 |
| 收稿时间： | 2019/9/12 0:00:00 |
Mechanism study on the phytoremediation of cadmium- and arsenic-contaminated soil by Polygonaceae plants with Enterobacter sp. |
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| LI Yi,WANG Bing-sen,HUANG Yuan-yuan,YAO Ya-wei,LIN Jia-min,LIU Ke-hui and YU Fang-ming.Mechanism study on the phytoremediation of cadmium- and arsenic-contaminated soil by Polygonaceae plants with Enterobacter sp.[J].Journal of Agro-Environment Science( J. Agro-Environ. Sci.),2020,39(2):304-312. |
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| Authors: | LI Yi WANG Bing-sen HUANG Yuan-yuan YAO Ya-wei LIN Jia-min LIU Ke-hui and YU Fang-ming |
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| Institution: | Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection, Ministry of Education, Guilin 541004, China;College of Environment and Resource, Guangxi Normal University, Guilin 541004, China,College of Environment and Resource, Guangxi Normal University, Guilin 541004, China,College of Environment and Resource, Guangxi Normal University, Guilin 541004, China,College of Environment and Resource, Guangxi Normal University, Guilin 541004, China,College of Environment and Resource, Guangxi Normal University, Guilin 541004, China,Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection, Ministry of Education, Guilin 541004, China;College of Life Science, Guangxi Normal University, Guilin 541004, China and Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection, Ministry of Education, Guilin 541004, China;College of Environment and Resource, Guangxi Normal University, Guilin 541004, China |
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| Abstract: | We conducted this study to investigate the effects of different Enterobacter sp. FM-1 inoculation levels on the growth, phytoremediation of cadmium and arsenic, antioxidant enzymatic system, and non-enzymatic system by Polygonaceae plants(Polygonum hydropiper L. and Polygonum lapathifolium L.)in cadmium-arsenic co-contaminated soil. The results indicated inoculation with Enterobacter sp. FM-1 promoted the growth of both plants. Furthermore, there were increased contents of chlorophyll and carotenoids in the leaves of Polygonum hydropiper L. and Polygonum lapathifolium L. Inoculation with Enterobacter sp. FM-1(3.4×107 CFU·g-1 soil)decreased rhizospheric soil pH. For both Polygonum hydropiper L. and Polygonum lapathifolium L., compared to that of the uninoculated control, the soil pH value decreased by 0.35 and 0.28, respectively. The content of cadmium and arsenic in the roots, stems, and leaves of the two plants increased 1.64~2.74 times and 1.21~2.51 times, respectively. Additionally, inoculation with Enterobacter sp. could not only increase the content of SOD, POD, and CAT in the leaves of Polygonum hydropiper L. and Polygonum lapathifolium L., but also increased the content of GSH and PCs. Moreover, the content of O2-·and MDA were effectively decreased. Our findings indicated that inoculation with Enterobacter sp. FM-1 helped plants alleviate heavy metal poisoning by increasing the activity of antioxidant enzymes. Hence, Enterobacter sp. FM-1 is potentially useful for cadmium and arsenic phytoremediation in cadmium-arsenic co-contaminated soil by Polygonum hydropiper L. and Polygonum lapathifolium L.. |
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| Keywords: | Polygonum hydropiper L Polygonum lapathifolium L Enterobacter sp FM-1 cadmium arsenic |
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