Toxicity of copper, lead, and cadmium on the motility of two marine
microalgae Isochrysis galbana and Tetraselmis chui |
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Authors: | Guangxu Liu Xueliang Chai Yanqing Shao Lihua Hu Qilang Xie and Hongxi Wu |
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Institution: | 1. College of Animal Sciences, Zhejiang University, Hangzhou 310029, China 2. Zhejiang Mariculture Research Institute, Wenzhou 325005, China 3. Zhejiang Mariculture Research Institute, Wenzhou 325005, China;Zhejiang Key Laboratory of Exploitation and Preservation of Costal Bio-resources, Wenzhou 325005, China |
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Abstract: | Computer assisted movement tracking was used to characterize the motility of two marine microalgae, Isochrysis galbana
and Tetraselmis chui, and to investigate the toxicity of Cu, Pb, and Cd on motile percentage, curvilinear velocity, average path
velocity, straight line velocity, linearity, straightness, and wobble. Except for motile percentage, all other motility parameters di ered
significantly between I. galbana and T. chui. Based on relative motile percentage data, the median e ective concentration (EC50) of Cu
on the motility of I. galbana and T. chui was 31.4 and 1.3 mol/L, respectively, while for Pb it was 37.8 and 10.9 mol/L and for Cd it
was 121.6 and 37.8 mol/L, respectively. Compared to I. galbana, T. chui was more sensitive to all tested metals. The toxic e ect of the
heavy metals on motility exhibited the following decreasing order for both species: Cu > Pb > Cd. Our results indicate that I. galbana
and T. chui motility is sensitive to heavy metals and can be used as an indicator for toxicology bioassays. |
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Keywords: | copper lead cadmium motility Isochrysis galbana Tetraselmis chui |
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