title: Accumulation and speciation of selenium in plants as affected by arbuscular mycorrhizal fungus Glomus mosseae.
abstract: Effects of arbuscular mycorrhizal fungus (Glomus mosseae) on the accumulation and speciation of selenium (Se) in alfalfa, maize, and soybean were investigated by using Se(IV)-spiked soil. Mycorrhizal inoculation decreased Se accumulation in roots and shoots of all the plants at Se spiked level of 0 or 2 mg kg(-1), while an increased Se accumulation was observed in alfalfa shoots and maize roots and shoots at the spiked level of 20 mg kg(-1). Concentration of inorganic Se (especially Se(VI)) in roots and shoots of the three plants was much higher in mycorrhizal than non-mycorrhizal treatment. Mycorrhizal inoculation decreased the portion of total organic Se in plant tissues with the exception of alfalfa and maize shoots at Se spiked level of 20 mg kg(-1), in which organic Se portion did not reduced greatly (<5%) for mycorrhizal treatment. Mycorrhizal effects on alfalfa and maize were more obvious than on soybean in terms of root colonization rate, biomass, and Se accumulation.
authors.affiliation: State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing, 100085, China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Yu
authors.forename: Shuzhen
authors.initials: S
authors.lastname: Zhang
authors.forename: Bei
authors.initials: B
authors.lastname: Wen
authors.forename: Honglin
authors.initials: H
authors.lastname: Huang
authors.forename: Lei
authors.initials: L
authors.lastname: Luo
mesh_terms: D018533:Biomass; D002851:Chromatography, High Pressure Liquid; D013058:Mass Spectrometry; D038821:Mycorrhizae / Q000378:metabolism*; D010758:Phosphorus / Q000378:metabolism; D018517:Plant Roots / Q000378:metabolism / Q000382:microbiology; D010944:Plants / Q000378:metabolism* / Q000382:microbiology; D012015:Reference Standards; D012643:Selenium / Q000378:metabolism*
chemical_list: D010758:Phosphorus; D012643:Selenium