Remediation of polychlorinated biphenyl-contaminated soil by using a combination of ryegrass, arbuscular mycorrhizal fungi and earthworms.
In this work, a laboratory experiment was performed to investigate the influences of inoculation with the arbuscular mycorrhizal fungus (AMF) Glomus caledoniun L. and/or epigeic earthworms (Eisenia foetida) on phytoremediation of a PCB-contaminated soil by ryegrass grown for 180d. Planting ryegrass, ryegrass inoculated with earthworms, ryegrass inoculated with AMF, and ryegrass co-inoculated with AMF and earthworms decreased significantly initial soil PCB contents by 58.4%, 62.6%, 74.3%, and 79.5%, respectively. Inoculation with AMF and/or earthworms increased the yield of plants, and the accumulation of PCBs in ryegrass. However, PCB uptake by ryegrass accounted for a negligible portion of soil PCB removal. The number of soil PCB-degrading populations increased when ryegrass was inoculated with AMF and/or earthworms. The data show that fungal inoculation may significantly increase the remedial potential of ryegrass for soil contaminated with PCBs.
College of Landscape and Art, Jiangxi Agricultural University, Nanchang 330045, China; College of Information and Engineering, Jiangxi Agricultural University, Nanchang 330045, China. Electronic address: luyanfei819@163.com.
Yan-Fei
YF
Lu
School of Materials Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen 333403, China.
Mang
M
Lu
College of Information and Engineering, Jiangxi Agricultural University, Nanchang 330045, China.
Fang
F
Peng
College of Information and Engineering, Jiangxi Agricultural University, Nanchang 330045, China.
Yun
Y
Wan
Jiangxi Chenmin Paper Co., Ltd., Nanchang 330013, China.
Min-Hong
MH
Liao
D000818:Animals; D001673:Biodegradation, Environmental; D055137:Glomeromycota / Q000378:metabolism*; D008129:Lolium / Q000378:metabolism* / Q000382:microbiology*; D038821:Mycorrhizae / Q000378:metabolism*; D009835:Oligochaeta / Q000378:metabolism*; D018517:Plant Roots / Q000378:metabolism / Q000382:microbiology; D011078:Polychlorinated Biphenyls / Q000032:analysis / Q000378:metabolism*; D012987:Soil / Q000737:chemistry; D012988:Soil Microbiology; D012989:Soil Pollutants / Q000032:analysis / Q000378:metabolism*
D012987:Soil; D012989:Soil Pollutants; D011078:Polychlorinated Biphenyls
AMF; PCBs; Plant uptake; qPCR