Do arbuscular mycorrhizal fungi affect arsenic accumulation and speciation in rice with different radial oxygen loss?

H. LI, Yu Bon MAN, Z.H. YE, C. WU, S.C. WU, Ming Hung WONG

Research output: Contribution to journalArticles

15 Citations (Scopus)

Abstract

The effects of arbuscular mycorrhizal fungi (AMF) on the temporal variation of arsenic (As) speciation and accumulation in two paddy rice cultivars (TD 71 and Xiushui 11) with different degrees of radial oxygen loss (ROL) at three growth periods (day 7, day 35, day 63 after flooding the soil) were investigated in soil, spiked with and without 30 mg As kg−1. The results showed that TD 71 with high ROL colonized by Glomus intraradices led to higher root colonization rates than Xiushui 11 at three growth periods, both in soil with or without 30 mg As kg−1 (p < 0.05). Mycorrhizal inoculation led to elevated (p < 0.05) root ratios of arsenite (As(III)) conc./arsenate (As(V)) conc. (concentration) in TD 71 with high ROL at three growth periods in As contaminated flooding soils. Furthermore, the ratios of As(III) conc./As(V) conc. in roots of TD71 were significantly more than Xiushui 11 when colonized by AMF at three growth periods in 30 mg As kg−1 soil (p < 0.05). Therefore, rice with high ROL can favor AM fungal infection and enhance root ratio of As(III) conc./As(V) conc. in the presence of AMF. Copyright © 2012 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)1098-1104
JournalJournal of Hazardous Materials
Volume262
Early online dateMay 2012
DOIs
Publication statusPublished - Nov 2013

Citation

Li, H., Man, Y. B., Ye, Z. H., Wu, C., Wu, S. C., & Wong, M. H. (2013). Do arbuscular mycorrhizal fungi affect arsenic accumulation and speciation in rice with different radial oxygen loss? Journal of Hazardous Materials, 262, 1098-1104. doi: 10.1016/j.jhazmat.2012.05.044

Keywords

  • Radial oxygen loss
  • Arbuscular mycorrhizal fungi
  • Arsenic
  • Arsenate
  • Arsenite

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