Arbuscular mycorrhizal fungi reduced the ratios of inorganic/organic arsenic in rice grains

Hui LI, Xun Wen CHEN, Ming Hung WONG

Research output: Contribution to journalArticles

25 Citations (Scopus)

Abstract

Arbuscular mycorrhizal fungi (AMF) – Rhizophagus intraradices was inoculated to rice to investigate its effects on arsenic (As) uptake, grain As speciation, and rhizospheric As concentration of six rice cultivars grown in As-amended soil (60 mg As kg⁻¹ soil). The AMF inoculation induced either positive, neutral or negative responses in rice grown in As contaminated soil, suggesting that functional diversity may exist in AMF symbiosis when As is taken up and transferred. The ratios of inorganic/organic As concentrations in rice grains of all cultivars were significantly reduced by AMF, that involved the transformation of inorganic As into less toxic organic form dimethylarsinic acid (DMA) in rice. AMF decreased significantly total As and inorganic As concentrations in rice grains of Handao 3. Positive correlations (R² = 0.30–0.56, P < 0.05) between As in the rhizospheric soil solution and As in rice grain at different periods were observed. This inferred that the As survey of soil solution can be an effective measure for evaluating As in grains. Copyright © 2015 Elsevier Ltd.
Original languageEnglish
Pages (from-to)224-230
JournalChemosphere
Volume145
Early online dateNov 2015
DOIs
Publication statusPublished - Feb 2016

Citation

Li, H., Chen, X. W., & Wong, M. H. (2016). Arbuscular mycorrhizal fungi reduced the ratios of inorganic/organic arsenic in rice grains. Chemosphere, 145, 224-230.

Keywords

  • Arbuscular mycorrhizal fungi
  • Arsenic speciation
  • Rice grain
  • Rhizosphere

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