The microbial characteristics and differences in rhizospheric soils contaminated with PAEs grown high/low PAEs accumulation genotypes of Brassica parachinensis
Abstract：Two genotypic cultivars of Brassica parachinensis, Youqing-60 (high PAEs-accumulation) and Teqing-60 (low PAEs-accumulation), were cultivated in the soils spiked with three levels (20, 50 and 100mg/kg) of dibutyl phthalate and di(2-ethylhexyl) phthalate to investigate the microbial biomasses and metabolic activities in rhizospheric soils at four growth stages of Brassica parachinensis. The results showed that the microbial biomass C (Cmic) in rhizospheric soils of Youqing-60 and Teqing-60 ranged from 84.45 to 213.30mg/kg and 98.33 to 229.85mg/kg, and their microbial biomass N (Nmic) varied from 9.00to 25.86mg/kg and 12.69 to 34.36mg/kg, respectively, which were significantly higher than those in soils without plant. Their average well color development (AWCD) values ranged from 0.744 to 1.075 and 0.847 to 1.318, respectively, which of Teqing-60 were significantly higher than those in soils without plant. Moreover, Cmic, Nmic and AWCD in soils grown cultivar Teqing-60 were higher than those of Youqing-60 (except for treatment of T3 at flowering stage), and significant differences were observed between some treatments. PAEs concentrations in shoots and roots of two genotypes of Brassica parachinensis were not significantly negatively correlated with Cmic, Nmic and AWCD values, indicating that PAEs concentrations in shoots and roots of two genotypes of Brassica parachinensis may be related to other factors.
曾巧云, 莫测辉, 蔡全英. PAEs污染下2种基因型菜心根际土壤微生物特征及差异性[J]. 中国环境科学, 2011, 31(3): 466-473.
ZENG Qiao-Yun, MO Ce-Hui, CAI Quan-Ying. The microbial characteristics and differences in rhizospheric soils contaminated with PAEs grown high/low PAEs accumulation genotypes of Brassica parachinensis. CHINA ENVIRONMENTAL SCIENCECE, 2011, 31(3): 466-473.
