Land Contamination Assessment and Remediation Laboratory, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, PR China; China Geological Environmental Monitoring Institute, Beijing 100081, PR China.
Land Contamination Assessment and Remediation Laboratory, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, PR China; Chinese Academy for Environmental Planning, Beijing 100012, PR China.
Environ Pollut. 2017 Nov;230:862-870. doi: 10.1016/j.envpol.2017.07.037. Epub 2017 Jul 20.
The effects of two Pteris vittata L. accessions and a polycyclic aromatic hydrocarbon (PAH)-degrading bacterium (Alcaligenes sp.) on arsenic (As) uptake and phenanthrene dissipation were studied. The Alcaligenes sp. survived in the rhizosphere and improved soil As bioavailability with co-exposure. However, bacterial inoculation altered Pteris vittata L. stress tolerance, and substantially affected the As distribution in the rhizosphere of the two P. vittata accessions. Bacterial inoculation was beneficial to protect the Guangxi accession against the toxic effects, and significantly increased plant As and phenanthrene removal ratios by 27.8% and 2.89%, respectively. In contrast, As removal was reduced by 29.8% in the Hunan accession, when compared with corresponding non-inoculated treatments. We conclude that plant genotype selection is critically important for successful microorganism-assisted phytoremediation of soil co-contaminated with As and PAHs, and appropriate genotype selection may enhance remediation efficiency.
研究了两种凤尾蕨（Pteris vittata L.）和一种多环芳烃（PAH）降解菌（产碱杆菌属）对砷（As）吸收和菲降解的影响。产碱杆菌属在根际中存活，并在共暴露时提高了土壤中 As 的生物利用度。然而，细菌接种改变了凤尾蕨的胁迫耐受能力，并显著影响了两种凤尾蕨根际中 As 的分布。细菌接种有利于保护广西凤蕨免受毒性影响，分别显著提高了植物对 As 和菲的去除率 27.8%和 2.89%。相比之下，与相应的未接种处理相比，湖南凤蕨的 As 去除率降低了 29.8%。我们得出结论，植物基因型的选择对于成功地进行微生物辅助修复砷和多环芳烃污染的土壤至关重要，适当的基因型选择可能会提高修复效率。
