秋茄叶对复合重金属的胁迫反应及其积累能力研究

doi:10.11978/j.issn.1009-5470.2010.06.104

Journal of Tropical Oceanography ›› 2010, Vol. 29 ›› Issue (6): 104-109.doi: 10.11978/j.issn.1009-5470.2010.06.104cstr: 32234.14.j.issn.1009-5470.2010.06.104

• Marine biology • Previous Articles Next Articles

Study on stress responses and bioaccumulation of multiple heavy metals by the leaves of Kandelia candel

HUANG Guo-yong1,3, WANG You-shao1,2, SUN Cui-ci1,2, SONG Hui1,2, WU Mei-lin1, DONG Jun-de1

1. Key Laboratory of Tropical Marine Environmental Dynamics, South China Sea Institute of Oceanology, CAS, Guangzhou 510301, China; 2. National Field Station of Marine Ecosystem at Daya Bay, Shenzhen 518121, China; 3. State Key Laboratory of Organic Geo-chemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China

Received:2009-02-12 Revised:2009-06-03 Online:2010-12-15 Published:2010-12-15
Contact: 王友绍。 E-mail:yswang@scsio.ac.cn
About author:黄国勇(1977—), 男, 江西省进贤县人, 博士, 主要从事环境生态毒理学研究。E-mail: huang_gyh@sina.com
Supported by:
国家自然科学基金项目(41076070); 中国科学院知识创新工程重要方向性项目(KSCX2-SW-132);“十一五”国家科技支撑
计划重点项目(2009BADB2B0606)

Abstract

Abstract:

In order to probe into physiological effects of heavy metals on mangrove plant Kandelia candel, the changes of some physiological characteristics in the seedlings of Kandelia candel exposed to five various concentrations (T0, T1, T3, and T4) of multiple heavy metals (Cd, Pb, and Hg) for 30 days were studied using sand culture method. The results show that the concentration of Cd, Pb, and Hg in the leaves of Kandelia candel increased with increasing concentration of multiple heavy metals in the growth solution. The toxic effect and oxidative stress caused by heavy metals were evident by the reduction in photosynthetic pigments. Ascrobate (AsA) content increased up to T3 while down at T4. The content of glutathione (GSH) significantly increased when Kandelia candel was exposed to T2 and above. The activities of ascorbate peroxidase (APX) and glutathione reductase (GR) followed the same trends as AsA, which first increased up to T3 and then decreased. Glutathione peroxidase (GPX) activity showed significant induction at all heavy metal treatment. The results of the present study suggest that Kandelia candel was able to accumulate and tolerate heavy metals. Kandelia candel responded to heavy metals induced oxidative stress by modulating non-enzymatic antioxidants and enzymatic antioxidants.

Key words: Kandelia candel, Cadmium, Lead, Mercury, Multiple heavy metal pollution, Chlorophyll, Antioxidative system

HUANG Guo-yong,WANG You-shao,SUN Cui-ci,SONG Hui,. Study on stress responses and bioaccumulation of multiple heavy metals by the leaves of Kandelia candel[J].Journal of Tropical Oceanography, 2010, 29(6): 104-109.

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Study on stress responses and bioaccumulation of multiple heavy metals by the leaves of Kandelia candel

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