Antioxidative response of Kandelia obovata, a true mangrove species, to polybrominated diphenyl ethers (BDE-99 and BDE-209) during germination and early growth

Shazia Farzana, Juan Chen, Ying Pan, Yuk shan Wong, Nora Fung Yee Tam

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)

Abstract

A 3-months microcosm experiment with mangrove sediment spiked with PBDEs and planted with propagules of Kandelia obovata was conducted to investigate PBDE toxicity and antioxidative responses of the germinated seedlings. BDE-99 suppressed germination rate, leaves formation and growth of mangrove seedlings. The leaves and roots of BDE-99 treated seedlings had significantly higher superoxide (O2 ) release, malondialdehyde (MDA) and total polyphenol (TP) content, and peroxidase (POD) activity than the control. BDE-209 increased activities of all three antioxidative enzymes, catalase (CAT), POD and superoxide dismutase (SOD) in roots, but in leaves, only CAT activity was stimulated. The MDA content of BDE-209 treated seedlings was less than the control. PBDEs were found in plant tissues of the treated seedlings. These results indicated that even though PBDEs were taken up in tissues, K. obovata, due to its antioxidative defense enzymes, could tolerate PBDEs and could be used for the bioremediation of PBDE-contaminated environments.

Original languageEnglish
Pages (from-to)1063-1070
Number of pages8
JournalMarine Pollution Bulletin
Volume124
Issue number2
DOIs
Publication statusPublished - 30 Nov 2017

Keywords

  • Antioxidative enzymes
  • Germination
  • Growth
  • MDA
  • Polybrominated diphenyl ethers

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