title: Arsenic uptake in upland rice inoculated with a combination or single arbuscular mycorrhizal fungi.
abstract: A pot trial was conducted to investigate the role of arbuscular mycorrhizal fungi (AMF) on arsenic (As) uptake of upland rice (Oryza sativa L.) cultivar, Zhonghan 221; where the following 3 species of Glomus geosporum (Gg), G. mosseae (Gm) and G. versiforme (Gv) were applied as single or combined inoculations. In general, Gm significantly enhanced (p<0.05) total As concentration in Zhonghan 221 when compared to the non mycorrhizal (NM) treatment. The treatment inoculated with Gg + Gm increased total phosphorus (P) uptake and decreased total As uptake in the ingestible rice parts (husks and grains). In terms of AMF colonization rates, Gm had significantly higher (p<0.05) average values of 57.3% and 66.6% when grown in As0 and As40 soils, respectively, in comparison to that of Gg and Gv, and finally dropped to 3.63% when grown in As80 soil. There was a significant difference (p<0.05) between single AMF species (Gg or Gv) and AMF mixture treatments (Gg + Gv, Gg + Gm, Gv + Gm and Gg + Gv + Gm) in terms of total As concentrations in rice. No significant correlation between AMF colonization rates and As uptake in grains (r = 0.150, p > 0.01) and total P (r = 0.002, p > 0.01) were observed.
authors.affiliation: Croucher Institute for Environmental Sciences, and Department of Biology, Hong Kong Baptist University, Kowloon Tong, Hong Kong, Special Administrative Region.
authors.forename: W F
authors.initials: WF
authors.lastname: Chan
authors.forename: H
authors.initials: H
authors.lastname: Li
authors.forename: F Y
authors.initials: FY
authors.lastname: Wu
authors.forename: S C
authors.initials: SC
authors.lastname: Wu
authors.forename: M H
authors.initials: MH
authors.lastname: Wong
mesh_terms: D001151:Arsenic / Q000032:analysis* / Q000737:chemistry; D001673:Biodegradation, Environmental; D018533:Biomass; D055137:Glomeromycota / Q000235:genetics / Q000378:metabolism; D038821:Mycorrhizae / Q000378:metabolism*; D012275:Oryza / Q000378:metabolism*; D010758:Phosphorus / Q000737:chemistry; D018517:Plant Roots / Q000378:metabolism*; D036226:Seedlings / Q000187:drug effects; D012987:Soil; D012988:Soil Microbiology; D012989:Soil Pollutants / Q000032:analysis; D013045:Species Specificity
chemical_list: D012987:Soil; D012989:Soil Pollutants; D010758:Phosphorus; D001151:Arsenic