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

作　　者：李梅 谢玺韬 薛任皓 刘志礼 

机构地区：[1]School of Environment, Nanjing University Nanjing 210093, China [2]School of Life Sciences, Nanjing University Nanjing 210093, China

出　　处：《Chinese Journal of Oceanology and Limnology》2006年第2期154-160,共7页中国海洋湖沼学报（英文版）

基　　金：This work was supported by Natural Science Foundation of Jiangsu Province (No. 95021301).

摘　　要：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.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.

关 键 词：Platymonas subcordiformis strontium stress BIOSORPTION 

分 类 号：X173[环境科学与工程—环境科学]