title: Accumulation and phytoavailability of benzo[a]pyrene in an acid sandy soil.
abstract: Effects of benzo[a]pyrene (B[a]P) on ryegrass (Lolium perenne L.) growth, plant accumulation and dissipiation of B[a]P in a red sandy soil (Hapli-Udic Argosol) were studied in a pot experiment. The plants were grown for 61 days in soil spiked with B[a]P at 0, 12.5, 25 and 50 mg kg(-1). Control pots without plants were also set up. Soil extractable B[a]P, plant shoot and root biomass, and concentrations of B[a]P in plant shoots and roots were determined. Ryegrass biomass was increased by addition of B[a]P and root B[a]P concentrations were significantly correlated with B[a]P application rate, but no such correlation was found for shoot B[a]P concentrations. This indicates that B[a]P enhanced the growth of the ryegrass. The extractable B[a]P concentration in the planted soil was significantly lower than that in the unplanted control soil at the rate of 50 mg B[a]P kg(-1). This indicates that ryegrass may help to dissipate B[a]P in soil at concentrations over 50 mg kg(-1) soil although the mechanism for this is not understood.
authors.affiliation: Soil and Environmental Bioremediation Research Center, State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, 210008 Nanjing, China.
authors.forename: Weiqin
authors.initials: W
authors.lastname: Xing
authors.forename: Yongming
authors.initials: Y
authors.lastname: Luo
authors.forename: Longhua
authors.initials: L
authors.lastname: Wu
authors.forename: Jing
authors.initials: J
authors.lastname: Song
authors.forename: Peter
authors.initials: P
authors.lastname: Christie
mesh_terms: D000143:Acids; D001580:Benzopyrenes / Q000493:pharmacokinetics* / Q000633:toxicity; D001673:Biodegradation, Environmental; D018533:Biomass; D008129:Lolium / Q000254:growth & development / Q000378:metabolism*; D018517:Plant Roots / Q000254:growth & development / Q000378:metabolism; D018520:Plant Shoots / Q000254:growth & development / Q000378:metabolism; D012822:Silicon Dioxide; D012987:Soil / Q000032:analysis*; D012989:Soil Pollutants / Q000493:pharmacokinetics* / Q000633:toxicity; D013997:Time Factors
chemical_list: D000143:Acids; D001580:Benzopyrenes; D012987:Soil; D012989:Soil Pollutants; D012822:Silicon Dioxide