| Effects of strontium-induced stress on marine microalgae Platymonas subcordiformis （Chlorophyta： Volvocales） |
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| 引用本文： | 李梅,谢玺韬,薛任皓,刘志礼.Effects of strontium-induced stress on marine microalgae Platymonas subcordiformis （Chlorophyta： Volvocales）[J].中国海洋与湖沼学报,2006,24(2):154-160. |
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| 作者姓名： | 李梅 谢玺韬 薛任皓 刘志礼 |
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| 作者单位： | School of Environment Nanjing University Nanjing 210093 China，School of Life Sciences Nanjing University Nanjing 210093 China，School of Life Sciences Nanjing University Nanjing 210093 China，School of Life Sciences Nanjing University Nanjing 210093 China |
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| 基金项目： | This work was supported by Natural Science Foundation of Jiangsu Province (No. 95021301). |
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| 摘 要： | 1 INTRODUCTION Heavy metal pollution in marine environment has always been a serious problem over the last several decades, because most of the heavy metal species that enter marine environment accumulated there without decomposition. Strontium is a minor…
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| 关 键 词： | 锶 生物吸着作用 微藻类 叶绿素 海洋生物 |
| 收稿时间： | 13 April 2004 |
| 修稿时间： | 13 October 2004 |
Effects of strontium-induced stress on marine microalgaePlatymonas subcordiformis (Chlorophyta: Volvocales) |
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| Li Mei,Xie Xitao,Xue Renhao,Liu Zhili.Effects of strontium-induced stress on marine microalgaePlatymonas subcordiformis (Chlorophyta: Volvocales)[J].Chinese Journal of Oceanology and Limnology,2006,24(2):154-160. |
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| Authors: | Li Mei Xie Xitao Xue Renhao Liu Zhili |
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| Institution: | (1) School of Environment, Nanjing University, 210093 Nanjing, China;(2) School of Life Sciences, Nanjing University, 210093 Nanjing, China |
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| Abstract: | Strontium-induced stress in growth and chlorophyll contents of Platymonas subcordiformis was investigated under laboratory condition. The results showed that strontium exposure had little influ- ences in general on growth and chlorophyll contents of the algae except for very high Sr concentrations. The maximum biosorption capacity of strontium ranged from 69.62 to 269.18 mg Sr2 /g dry weight. The algal biomass exhibited high uptake capacity of strontium. Total superoxide dismutase (SOD) activity and the content of lipid peroxidation products malondialdehyde (MDA) were significantly different in differ- ent treatments. SOD activity reached the highest level at 0.09 mmol/L that was about 55.8 % higher than that in the control. The MDA content increased significantly at 0.36 mmol/L, which was 2.15 times higher than that in the control, indicating a state of oxidative stress. With the increase of strontium concentration, the amount of fatty acids decreased. |
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| Keywords: | Platymonas subcordiformis strontium stress biosorption |
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