title: Effect of a polybrominated diphenyl ether congener (BDE-47) on growth and antioxidative enzymes of two mangrove plant species, Kandelia obovata and Avicennia marina, in South China.
abstract: The effects of BDE-47 on the growth and antioxidative responses of the seedlings of Kandelia obovata (Ko) and Avicennia marina (Am) were compared in an 8-week hydroponic culture spiked with different levels of BDE-47, 0.1, 1, 5 and 10 mg l(-1). The two highest BDE-47 levels significantly suppressed the growth and increased the activities of three antioxidative enzymes, superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT), of Ko in week 1. However, SOD and POD activities at high levels of BDE-47 became lower than the control in week 8. On the contrary, growth of Am was not affected at all contamination levels, and the activities of three enzymes were enhanced by BDE-47 in weeks 1 and 4, but such stimulatory effect became insignificant in week 8. Avicennia was more tolerant to BDE-47 toxicity than Kandelia, as its antioxidative enzymes could better counter-balance the oxidative stress caused by BDE-47.
authors.affiliation: Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong Special Administrative Region.
authors.forename: Ying
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong Special Administrative Region.
authors.forename: Haowen
authors.initials: H
authors.lastname: Zhu
authors.affiliation: Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong Special Administrative Region; State Key Laboratory in Marine Pollution, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong Special Administrative Region. Electronic address: bhntam@cityu.edu.hk.
authors.forename: Nora Fung Yee
authors.initials: NF
authors.lastname: Tam
mesh_terms: D032407:Avicennia / Q000187:drug effects* / Q000378:metabolism; D002374:Catalase / Q000378:metabolism; D002681:China; D055768:Halogenated Diphenyl Ethers / Q000633:toxicity*; D018384:Oxidative Stress / Q000187:drug effects; D009195:Peroxidase / Q000378:metabolism; D043982:Rhizophoraceae / Q000187:drug effects* / Q000378:metabolism; D036226:Seedlings / Q000187:drug effects / Q000378:metabolism; D012989:Soil Pollutants / Q000633:toxicity*; D013482:Superoxide Dismutase / Q000378:metabolism
chemical_list: D055768:Halogenated Diphenyl Ethers; D012989:Soil Pollutants; C511295:2,2',4,4'-tetrabromodiphenyl ether; D002374:Catalase; D009195:Peroxidase; D013482:Superoxide Dismutase
keywords: Antioxidative enzymes; Catalase (CAT); Mangroves; PBDE toxicity; Peroxidase (POD); Superoxide dismutase (SOD)