title: Synergistic effects of arbuscular mycorrhizal fungi and phosphate rock on heavy metal uptake and accumulation by an arsenic hyperaccumulator.
abstract: The effects of arbuscular mycorrhizal (AM) fungi and phosphate rock on the phytorextraction efficiency of a hyperaccumulator (Pteris vittata) and a non-hyperaccumulator (Cynodon dactylon) plant were studied. Both seedlings were planted in As contaminated soil under different treatments [(1) control (contaminated soil only), (2) indigenous mycorrhizas (IM), (3) mixed AM inoculum [indigenous mycorrhiza + Glomus mosseae (IM/Gm)] and (4) IM/Gm + phosphate rock (P rock)] with varying intensities (40%, 70% and 100%) of water moisture content (WMC). Significant As reduction in soil (23.8% of soil As reduction), increase in plant biomass (17.8 g/pot) and As accumulation (2054 mg/kg DW) were observed for P. vittata treated with IM/Gm + PR at 100% WMC level. The overall results indicated that the synergistic effect of mycorrhiza and P rock affected As subcellular distribution of the hyperaccumulator and thereby altered its As removal efficiency under well-watered conditions.
authors.affiliation: Croucher Institute for Environmental Sciences, Hong Kong Baptist University, Hong Kong, PR China.
authors.forename: H M
authors.initials: HM
authors.lastname: Leung
authors.forename: F Y
authors.initials: FY
authors.lastname: Wu
authors.forename: K C
authors.initials: KC
authors.lastname: Cheung
authors.forename: Z H
authors.initials: ZH
authors.lastname: Ye
authors.forename: M H
authors.initials: MH
authors.lastname: Wong
mesh_terms: D001151:Arsenic / Q000493:pharmacokinetics*; D001673:Biodegradation, Environmental; D031744:Cynodon / Q000378:metabolism; D004357:Drug Synergism; D019216:Metals, Heavy / Q000493:pharmacokinetics*; D038821:Mycorrhizae / Q000378:metabolism*; D010710:Phosphates / Q000737:chemistry*; D032495:Pteris / Q000378:metabolism; D012989:Soil Pollutants / Q000493:pharmacokinetics
chemical_list: D019216:Metals, Heavy; D010710:Phosphates; D012989:Soil Pollutants; D001151:Arsenic