Toxicity of copper, lead, and cadmium on the motility of two marine microalgae Isochrysis galbana and Tetraselmis chui

• Published in: Journal of environmental sciences (China) 2011-02, Vol.23 (2), p.330-335
• Main Authors: Liu, Guangxu, Chai, Xueliang, Shao, Yanqing, Hu, Lihua, Xie, Qilang, Wu, Hongxi
• Format: Article
• Language: English
• Subjects: bioassays; Cadmium; Cadmium - toxicity; computers; Copper; Copper - toxicity; Heavy metals; Isochrysis galbana; lead; Lead (metal); Lead - toxicity; Marine; Marine Biology; microalgae; Microalgae - classification; Microalgae - drug effects; motility; Species Specificity; Tetraselmis chui; Tetraselmis chuii; Toxicity; Toxicology; 四列藻; 毒性作用; 海洋微藻; 等鞭金藻; 运动跟踪; 镉胁迫
• ISSN: 1001-0742; 1878-7320
• DOI: 10.1016/s1001-0742(10)60410-x

Computer assisted movement tracking was used to characterize the motility of two marine microalgae, lsochrysis 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 differed significantly between L galbana and T. chui. Based on relative motile percentage data, the median effective concentration （ECs0） of Cu on the motility of L galbana and T. chui was 31.4 and 1.3 gmol/L, respectively, while for Pb it was 37.8 and 10.9 ~tmol/L and for Cd it was 12 1.6 and 37.8 ~tmol/L, respectively. Compared to L galbana, T. chui was more sensitive to all tested metals. The toxic effect of the heavy metals on motility exhibited the following decreasing order for both species： Cu 〉 Pb 〉 Cd. Our results indicate that L galbana and T. chui motility is sensitive to heavy metals and can be used as an indicator for toxicology bioassays.