title: Phytoremediation of diphenylarsinic-acid-contaminated soil by Pteris vittata associated with Phyllobacterium myrsinacearum RC6b.
abstract: A pot experiment was conducted to explore the phytoremediation of a diphenylarsinic acid (DPAA)-spiked soil using Pteris vittata associated with exogenous Phyllobacterium myrsinacearum RC6b. Removal of DPAA from the soil, soil enzyme activities, and the functional diversity of the soil microbial community were evaluated. DPAA concentrations in soil treated with the fern or the bacterium were 35-47% lower than that in the control and were lowest in soil treated with P. vittata and P. myrsinacearum together. The presence of the bacterium added in the soil significantly increased the plant growth and DPAA accumulation. In addition, the activities of dehydrogenase and fluorescein diacetate hydrolysis and the average well-color development values increased by 41-91%, 37-78%, and 35-73%, respectively, in the treatments with P. vittata and/or P. myrsinacearum compared with the control, with the highest increase in the presence of P. vittata and P. myrsinacearum together. Both fern and bacterium alone greatly enhanced the removal of DPAA and the recovery of soil ecological function and these effects were further enhanced by P. vittata and P. myrsinacearum together. Our findings provide a new strategy for remediation of DPAA-contaminated soil by using a hyperaccumulator/microbial inoculant alternative to traditional physicochemical method or biological degradation.
authors.affiliation: a Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences , Nanjing , China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Teng
authors.affiliation: a Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences , Nanjing , China.
authors.forename: Shijiang
authors.initials: S
authors.lastname: Feng
authors.affiliation: a Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences , Nanjing , China.
authors.forename: Wenjie
authors.initials: W
authors.lastname: Ren
authors.affiliation: a Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences , Nanjing , China.
authors.forename: Lingjia
authors.initials: L
authors.lastname: Zhu
authors.affiliation: a Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences , Nanjing , China.
authors.forename: Wenting
authors.initials: W
authors.lastname: Ma
authors.affiliation: a Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences , Nanjing , China.
authors.forename: Peter
authors.initials: P
authors.lastname: Christie
authors.affiliation: a Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences , Nanjing , China.
authors.forename: Yongming
authors.initials: Y
authors.lastname: Luo
mesh_terms: D020561:Alphaproteobacteria / Q000378:metabolism*; D001152:Arsenicals / Q000378:metabolism*; D001673:Biodegradation, Environmental; D032495:Pteris / Q000254:growth & development / Q000378:metabolism*; D012987:Soil / Q000737:chemistry; D012988:Soil Microbiology; D012989:Soil Pollutants / Q000378:metabolism*
chemical_list: D001152:Arsenicals; D012987:Soil; D012989:Soil Pollutants; C493087:diphenylarsinic acid
keywords: Phyllobacterium myrsinacearum Rc6b; Pteris vittata; diphenylarsinic acid; phytoremediation; soil enzyme activities; soil microbial functional diversity