根际
植物修复
土壤污染
白三叶
农学
微生物
雷彭斯
化学
环境化学
土壤酶
植物提取工艺
生物修复
环境科学
污染
土壤水分
超量积累植物
生物
酶分析
重金属
酶
生态学
细菌
土壤科学
生物化学
遗传学
作者
Hai Lin,Chenjing Liu,Bing Li,Yingbo Dong
标识
DOI:10.1016/j.jhazmat.2020.123829
摘要
Rhizosphere soil physiochemical properties, enzyme activities and rhizosphere associated microbial communities are of the central importance for modulating phytoremediation in heavy metal contaminated soil. In this study, the rhizosphere micro-ecological characteristics of phytoremediation in seven groups of contaminated soil with different heavy metal species and concentrations were examined. The results showed that heavy metal-enrichment inhibited plant growth, but enhanced both anions (Cr2O72−) and cations (Cd2+ and Pb2+) uptake with corresponding mean values ranging from 19.37 to 168.74 mg/kg in roots and 10.89–86.53 mg/kg in shoots. Trifolium repens L. planting was able to compensate the lost caused by the heavy metal on the soil organic matter, available N, available P, available K and enzyme activities as well. According to the cluster, some species like Lysobacter, Kaistobacter and Pontibacter, was significantly related to heavy metal accumulation while others such as Flavisolibacter, Adhaeribacter and Bacillus promoted plant growth. The importance of root-associated microbial community could relatively regulate plant growth and heavy metal uptake. Our study not only illustrated the correlation among rhizosphere micro-ecological parameters, and the possible mechanisms of phytoremediation regulation, but also provide clear strategy for improving the phytoremediation efficiency.
科研通智能强力驱动
Strongly Powered by AbleSci AI