Effects of strontium-induced stress on marine microalgae Platymonas subcordiformis （Chlorophyta： Volvocales）

• Published in: Chinese journal of oceanology and limnology 2006, Vol.24 (2), p.154-160
• Main Author: 李梅 谢玺韬 薛任皓 刘志礼
• Format: Article
• Language: English
• Subjects: 叶绿素; 微藻类; 海洋生物; 生物吸着作用
• ISSN: 0254-4059; 1993-5005

Strontium-induced stress in growth and chlorophyll contents of Platymonas subcordiformis was investigated under laboratory condition. The results showed that strontium exposure had little influences 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 Sr^2＋/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 different 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.