Uptake and transport mechanisms of decabromodiphenyl ether (BDE-209) by rice (Oryza sativa)

Ka Lai CHOW, Yu Bon MAN, Fung Yee Nora TAM, Yan LIANG, Ming Hung WONG

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21 Citations (Scopus)

Abstract

The extensive industrial use of brominated flame retardants has aroused rapidly growing public concerns about their ubiquity in the environment. The feasibility of uptake and translocation of decabromodiphenyl ether (BDE-209) by three rice cultivars, namely Fengmeizhan, Hefengzhan and Guangyinzhan, and the uptake mechanisms of BDE-209 into rice roots, were investigated by employing a partition-limited model. Uptake of BDE-209 by the rice cultivars (Fengmeizhan, Hefengzhan and Guangyinzhan) was examined by a 60-day cultivation in sterilized BDE-209 spiked sand, followed by Soxhlet extraction and gas chromatography–mass spectrometry (GC–MS) analysis. A partition-limited model was applied for estimating and describing the approach of the uptake of BDE-209 by rice in sand. The average quasi-equilibrium factor (αᵨᵼ) of BDE-209 in root uptake in sand was 0.112 × 10¯³ for three rice cultivars in the present study (<1), implying a non-equilibrium movement of molecules and a dominated passive transport uptake. According to the results of sorption analysis of dead and fresh roots, apoplastic pathway likely dominated the transport of BDE-209 into roots cells. Copyright © 2014 Published by Elsevier Ltd.
Original languageEnglish
Pages (from-to)1262-1267
JournalChemosphere
Volume119
DOIs
Publication statusPublished - Jan 2015

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decabromobiphenyl ether
ether
Ethers
Sand
rice
cultivar
sand
Flame retardants
Spectrometry
Sorption
Molecules
translocation
Flame Retardants
spectrometry
Gases
sorption
Oryza

Citation

Chow, K. L., Man, Y. B., Tam, N. F. Y., Liang, Y., & Wong, M. H. (2015). Uptake and transport mechanisms of decabromodiphenyl ether (BDE-209) by rice (Oryza sativa). Chemosphere, 119, 1262-1267.

Keywords

  • Apoplastic path
  • Brominated flame retardants
  • Partition-limited model
  • Quasi-equilibrium factor