title: Responses of Scirpus triqueter, soil enzymes and microbial community during phytoremediation of pyrene contaminated soil in simulated wetland.
abstract: The aim of this study was to determine the enhancement of Scirpus triqueter in the dissipation of pyrene and the interaction of pyrene with plant, soil enzymes and microbial community. The results indicated that the dissipation ratios of pyrene in the rhizospheric and non-rhizospheric soil were 64.65 ± 3.86% and 54.49 ± 2.74%, respectively, and were higher than that in the unplanted soil (42.60 ± 0.71%) at 80 d after planting S. triqueter. The pyrene was toxic to S. triqueter, as evidenced by growth inhibition in height, diameter, shoot number and biomass during the planting period. The activities of dehydrogenase decreased significantly at the presence of pyrene in soils, and increased remarkably with the introduction of S. triqueter. It was found that the pyrene addition increased the ratios of fungal/total fatty acids and gram-positive/gram-negative, but the presence of S. triqueter decreased the ratios of gram-positive/gram-negative. A larger stress level was found in the pyrene treated soils without S. triqueter. The ratio of aerobic/anaerobic bacteria decreased with increasing pyrene concentration, but increased when S. triqueter was planted. The principal analysis of phospholipid fatty acid signatures revealed that microbial community structures in the rhizospheric and non-rhizospheric soil were similar, but different from those in the unplanted and control soil.
authors: Laboratory of Environmental Remediation, College of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, PR China.
authors: Xinying
authors: X
authors: Zhang
authors: Xiaoyan
authors: X
authors: Liu
authors: Shanshan
authors: S
authors: Liu
authors: Fahui
authors: F
authors: Liu
authors: Lisha
authors: L
authors: Chen
authors: Gang
authors: G
authors: Xu
authors: Chenglin
authors: C
authors: Zhong
authors: Pengcheng
authors: P
authors: Su
authors: Zhengnan
authors: Z
authors: Cao
mesh_terms: D001673:Biodegradation, Environmental; D018533:Biomass; D029785:Cyperaceae / Q000254:growth & development / Q000378:metabolism*; D004798:Enzymes / Q000378:metabolism*; D012987:Soil; D012989:Soil Pollutants / Q000378:metabolism*; D053833:Wetlands
chemical_list: D004798:Enzymes; D012987:Soil; D012989:Soil Pollutants