Effects of mycorrhizal inoculation of upland rice on uptake kinetics of arsenate and arsenite

Fuyong Wu*, Xueping Liu, Shengchun Wu, Ming Hung WONG

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

We assessed the effect of mycorrhizal inoculation on short-term uptake kinetics of arsenate and arsenite by excised roots of upland rice (Oryza sativa L. cv. Zhonghan 221). A concentration of 0.01-0.05 mM arsenic (As) differentially affected the influx rates of both arsenate and arsenite into rice roots non-inoculated or inoculated with Glomus mosseae and G. versiforme. While Vmax for arsenate uptake by non-mycorrhizal roots was 1.02 μmol g-1 fresh weight h-1, it was reduced by a factor of 2.4 for mycorrhizal roots (about 0.42 μmol g-1 fresh weight h-1) in the high-affinity uptake system. However, at high concentrations of 0.5-2.5 mM As only G. versiforme was able to reduce As influx. The results show that mycorrhizal effects on As uptake of upland rice are both concentration and species-specific. Copyright

Original languageEnglish
Pages (from-to)333-338
Number of pages6
JournalJournal of Plant Nutrition and Soil Science
Volume178
Issue number2
DOIs
Publication statusPublished - 1 Apr 2015

Scopus Subject Areas

  • Soil Science
  • Plant Science

User-Defined Keywords

  • AM fungi
  • Inorganic arsenic
  • Oryza sativa
  • Upland rice

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