[Combined remediation effects of arbuscular mycorrhizal fungi-legumes-rhizobium symbiosis on PCBs contaminated soils].
The combined remediation effects of dual inoculation with an arbuscular mycorrhizal fungus (AM) and rhizabium (Rhizobium meliloti) with a host plant (alfalfa) on PCBs contaminated soils was studied using pot experiments. The results showed that alfalfa had a clear role in PCBs removal in soils compared with treatments without alfalfa and inoculated microorganisms, PCBs concentration in lightly and heavily polluted soils decreased 15.8% and 23.5%, respectively. After planting alfalfa with single incubation of Glomus caledonium, PCBs concentration decreased 14.8% and 24.1% from lightly and heavily polluted soils, decreased 20.6% and 25.5% for single incubation of Rhizobium meliloti, respectively. After dual incubation with Glomus caledonium and Rhizobium meliloi, PCBs concentration in lightly and heavily polluted soils decreased 23.2% and 26.9%. We also observed that soil microbial communities in alfalfa rhizosphere soils had a higher carbon utilization rate, improving the functional diversity of the soil microbial community. The results suggest that dual incubation of Glomus caledonium and Rhizobium meliloti has great potential in remediation of PCBs contaminated soils.
Teng
Ying
Y
Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences,Nanjing 210008, China. yteng@issas.ac.cn
Luo
Yong-Ming
YM
Gao
Jun
J
Li
Zhen-Gao
ZG
D001673:Biodegradation, Environmental; D000455:Medicago sativa / Q000378:metabolism* / Q000382:microbiology*; D038821:Mycorrhizae / Q000378:metabolism*; D018517:Plant Roots / Q000378:metabolism / Q000382:microbiology; D011078:Polychlorinated Biphenyls / Q000378:metabolism*; D016962:Sinorhizobium meliloti / Q000378:metabolism*; D012989:Soil Pollutants / Q000378:metabolism*; D013559:Symbiosis
D012989:Soil Pollutants; D011078:Polychlorinated Biphenyls