期刊
MARINE POLLUTION BULLETIN
卷 64, 期 11, 页码 2453-2460出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2012.07.047
关键词
Kandelia obovata (S., L.); Yong; Cadmium; Tolerance mechanisms; Thiol pool; Subcellular distribution; Chemical form
资金
- National Natural Science Foundation of China [31170471, 30970527, 30710103908, 30970526, 31000244]
In order to explore the detoxification mechanisms adopted by mangrove under cadmium (Cd) stress, we investigated the subcellular distribution and chemical forms of Cd, in addition to the change of the thiol pools in Kandelia obovata (S., L.) Yong, which were cultivated in sandy culture medium treated with sequential Cd solution. We found that Cd addition caused a proportional increase of Cd in the organs of K. obovata. The investigation of subcellular distribution verified that most of the Cd was localized in the cell wall, and the lowest was in the membrane. Results showed sodium chloride and acetic acid extractable Cd fractions were dominant. The contents of non-protein thiol compounds, Glutathione and phytochelatins in K. obovata were enhanced by the increasing strength of Cd treatment. Therefore, K. obovata can be defined as Cd tolerant plant, which base on cell wall compartmentalization, as well as protein and organic acids combination. (C) 2012 Elsevier Ltd. All rights reserved.
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