Arbuscular mycorrhizal symbiosis influences arsenic accumulation and speciation in Medicago truncatula L. in arsenic-contaminated soil.

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  • Additional Information
    • Source:
      Publisher: Elsevier Science Ltd Country of Publication: England NLM ID: 0320657 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1879-1298 (Electronic) Linking ISSN: 00456535 NLM ISO Abbreviation: Chemosphere Subsets: MEDLINE
    • Publication Information:
      Publication: Oxford : Elsevier Science Ltd
      Original Publication: Oxford, New York, : Pergamon Press.
    • Subject Terms:
      Symbiosis*; Arsenic/*metabolism ; Arsenic/*pharmacokinetics ; Medicago truncatula/*metabolism ; Mycorrhizae/*physiology ; Soil/*chemistry ; Soil Pollutants/*pharmacology; Arsenic/analysis ; Arsenites/metabolism ; Biomass ; Oxidation-Reduction ; Phosphorus/analysis ; Plant Roots/chemistry ; Plant Shoots/chemistry ; Soil Pollutants/analysis
    • Abstract:
      In two pot experiments, wild type and a non-mycorrhizal mutant (TR25:3-1) of Medicago truncatula were grown in arsenic (As)-contaminated soil to investigate the influences of arbuscular mycorrhizal fungi (AMF) on As accumulation and speciation in host plants. The results indicated that the plant biomass of M. truncatula was dramatically increased by AM symbiosis. Mycorrhizal colonization significantly increased phosphorus concentrations and decreased As concentrations in plants. Moreover, mycorrhizal colonization generally increased the percentage of arsenite in total As both in shoots and roots, while dimethylarsenic acid (DMA) was only detected in shoots of mycorrhizal plants. The results suggested that AMF are most likely to get involved in the methylating of inorganic As into less toxic organic DMA and also in the reduction of arsenate to arsenite. The study allowed a deeper insight into the As detoxification mechanisms in AM associations. By using the mutant M. truncatula, we demonstrated the importance of AMF in plant As tolerance under natural conditions.
      (Copyright © 2014 Elsevier Ltd. All rights reserved.)
    • Contributed Indexing:
      Keywords: Arbuscular mycorrhizal fungi; Arsenic speciation; Medicago truncatula; Mutant; Phosphorus
    • Accession Number:
      0 (Arsenites)
      0 (Soil)
      0 (Soil Pollutants)
      27YLU75U4W (Phosphorus)
      N5509X556J (arsenite)
      N712M78A8G (Arsenic)
    • Publication Date:
      Date Created: 20140714 Date Completed: 20150911 Latest Revision: 20181202
    • Publication Date:
      20240829
    • Accession Number:
      10.1016/j.chemosphere.2014.06.042
    • Accession Number:
      25016555