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Marine pollution, ecotoxicology and sustainability
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Interactive effect of copper and temperature on growth and physiology in Thalassiosira pseudonana
P-E1-01-S
Wang Cao* , Marine Biology Institute, Shantou University, Shantou, Guangdong 515063, China
Guangdong Provincial Key Laboratory of Marine Biology, Shantou University, Shantou, Guangdong 515063, China
STU-UNIVPM Joint Algal Research Center, Shantou University, Shantou 515063, Guangdong, China
Liai Peng, Marine Biology Institute, Shantou University, Shantou, Guangdong 515063, China
Guangdong Provincial Key Laboratory of Marine Biology, Shantou University, Shantou, Guangdong 515063, China
STU-UNIVPM Joint Algal Research Center, Shantou University, Shantou 515063, Guangdong, China
Su Xu, Marine Biology Institute, Shantou University, Shantou, Guangdong 515063, China
Guangdong Provincial Key Laboratory of Marine Biology, Shantou University, Shantou, Guangdong 515063, China
STU-UNIVPM Joint Algal Research Center, Shantou University, Shantou 515063, Guangdong, China
Wenhua Liu, Marine Biology Institute, Shantou University, Shantou, Guangdong 515063, China
Guangdong Provincial Key Laboratory of Marine Biology, Shantou University, Shantou, Guangdong 515063, China
STU-UNIVPM Joint Algal Research Center, Shantou University, Shantou 515063, Guangdong, China
Ping Li, Marine Biology Institute, Shantou University, Shantou, Guangdong 515063, China
Guangdong Provincial Key Laboratory of Marine Biology, Shantou University, Shantou, Guangdong 515063, China
STU-UNIVPM Joint Algal Research Center, Shantou University, Shantou 515063, Guangdong, China
Presenter Email: 16wcao@stu.edu.cn |
Copper is essential trance metal for many physiological processes (eg. electron transfer reactions and high-affinity Fe transport system) in phytoplankton, however, it can be potentially toxic at high concentrations. In the marine ecosystem, induced tolerance of exposed on phytoplankton cannot be always attributed solely to the present of toxicants as various environment factors, such as temperature. In this study, effects of different concentrations of copper (0, 19.6, 160, 800, 8000 nM) simultaneously applied at two temperatures (20 degree and 25 degree to the centric diatom Thalassiosira pseudonana were detected by measuring growth and physiological changes. At the low (0 nM) and high (8000 nM) Cu concentration, growth rate of T. pseudonana was inhibited and increase temperature can reduce the inbibition. The POC and PON content decrease by 11.3% and 14.1% with increasing copper concentration from 0 to 19.6 nM , while increased by 16.1% and 17.7% respectively with increase copper concentration from 19.6 nM to 8000 nM. The Copper content in T. pseudonana range from 0.13 to 13.28 fg/cell to respond the outside copper content increases by adjusting the transcription expression of copper transport genes. It can also change the transcription expression of other genes, including photosynthetic gene and silicon synthesis genes. In brief, our results show that T. pseudonana can adjust the physiological process and molecular mechanism to respond to the changes in environmental factors.
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