Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 181, Issue 1-3, Pages 497-507Publisher
ELSEVIER
DOI: 10.1016/j.jhazmat.2010.05.042
Keywords
Phytoextraction; Arsenic; Hyperaccumulator; Mycorrhizae; Phosphate
Categories
Funding
- Research Grants Council of Hong Kong [HKBU-CERG 2004-05-2145/04M]
- HKBU [RC/AoE/08-09/01]
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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 hyperaccuinulator and thereby altered its As removal efficiency under well-watered conditions. (C) 2010 Elsevier B.V. All rights reserved.
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