Effect of Engineered Nanoparticles on Exopolymeric Substances Release from Marine Phytoplankton. Academic Article uri icon


  • Engineered nanoparticles (ENPs), products from modern nanotechnologies, can potentially impact the marine environment to pose serious threats to marine ecosystems. However, the cellular responses of marine phytoplankton to ENPs are still not well established. Here, we investigate four different diatom species (Odontella mobiliensis, Skeletonema grethae, Phaeodactylum tricornutum, Thalassiosira pseudonana) and one green algae (Dunaliella tertiolecta) for their extracellular polymeric substances (EPS) release under model ENP treatments: 25nm titanium dioxide (TiO2), 10-20nm silicon dioxide (SiO2), and 15-30nm cerium dioxide (CeO2). We found SiO2 ENPs can significantly stimulate EPS release from these algae (200-800%), while TiO2 ENP exposure induced the lowest release. Furthermore, the increase of intracellular Ca2+ concentration can be triggered by ENPs, suggesting that the EPS release process is mediated through Ca2+ signal pathways. With better understanding of the cellular mechanism mediated ENP-induced EPS release, potential preventative and safety measures can be developed to mitigate negative impact on the marine ecosystem.

published proceedings

  • Nanoscale Res Lett

author list (cited authors)

  • Chiu, M., Khan, Z. A., Garcia, S. G., Le, A. D., Kagiri, A., Ramos, J., ... Chin, W.

citation count

  • 28

complete list of authors

  • Chiu, Meng-Hsuen||Khan, Zafir A||Garcia, Santiago G||Le, Andre D||Kagiri, Agnes||Ramos, Javier||Tsai, Shih-Ming||Drobenaire, Hunter W||Santschi, Peter H||Quigg, Antonietta||Chin, Wei-Chun

publication date

  • January 2017