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

• Published in: Marine pollution bulletin 2014-08, Vol.85 (2), p.376-384
• Main Authors: Wang, Ying, Zhu, Haowen, Tam, Nora Fung Yee
• Format: Article
• Language: English
• Subjects: Animal and plant ecology; Animal, plant and microbial ecology; Antioxidative enzymes; Applied ecology; Avicennia; Avicennia - drug effects; Avicennia - metabolism; Avicennia marina; Biological and medical sciences; Brackish water ecosystems; Catalase (CAT); Catalase - metabolism; China; Ecotoxicology, biological effects of pollution; Fundamental and applied biological sciences. Psychology; Halogenated Diphenyl Ethers - toxicity; Kandelia; Mangroves; Marine; Marine and brackish environment; Oxidative Stress - drug effects; PBDE toxicity; Peroxidase (POD); Peroxidase - metabolism; Rhizophoraceae - drug effects; Rhizophoraceae - metabolism; Sea water ecosystems; Seedlings - drug effects; Seedlings - metabolism; Soil Pollutants - toxicity; Superoxide dismutase (SOD); Superoxide Dismutase - metabolism; Synecology
• ISSN: 0025-326X; 1879-3363
• DOI: 10.1016/j.marpolbul.2014.02.012

•BDE-47 posed oxidative stress to mangrove seedlings.•SOD, POD and CAT in leaf and root counter-balanced excess ROS produced from BDE-47.•Avicennia marina was more tolerant to BDE-47 toxicity than Kandelia obovata. 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 10mgl−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.