The relationship of root porosity and radial oxygen loss on arsenic tolerance and uptake in rice grains and straw

X. Q. Mei, Z. H. Ye*, Ming Hung WONG

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

119 Citations (Scopus)

Abstract

The correlations among arsenic (As) accumulation in grains and straw, rates of radial oxygen loss (ROL), and porosity of roots using 25 rice cultivars were investigated based on two pot experiments: (1) soil with addition of 100 mg As kg -1 for analysis of As in grains and straw, and (2) deoxygenated solution for analyzing rates of ROL and porosity of roots. The results showed that there were great differences in grain As (0.71-1.72 mg kg -1) and straw As (15.6-31.7 mg kg -1), rates of ROL (7.40-13.24 mmol O 2 kg -1 root d.w. h -1), and porosity (20.91-33.08%) among the cultivars. There were significant negative correlations between As in grains or straw and ROL and porosity, and significant positive correlations between rates of ROL and porosities, respectively. Rice cultivars with high porosities tended to possess higher rates of ROL, and had higher capacities for limiting the transfer of As to aboveground tissues.

Original languageEnglish
Pages (from-to)2550-2557
Number of pages8
JournalEnvironmental Pollution
Volume157
Issue number8-9
DOIs
Publication statusPublished - Aug 2009

Scopus Subject Areas

  • Toxicology
  • Pollution
  • Health, Toxicology and Mutagenesis

User-Defined Keywords

  • Accumulation
  • Aerenchyma
  • Arsenic
  • Oryza sativa L.
  • Radial oxygen loss (ROL)
  • Root porosity

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