Comparative Responses to Metal Oxide Nanoparticles in Marine Phytoplankton

  • Alexandra Castro-Bugallo
  • África González-Fernández
  • Cástor Guisande
  • Aldo Barreiro


A series of experiments was undertaken on three different marine microalgae to compare the effect of two metal oxide nanoparticles (NPs) on different physiological responses to stress: zinc oxide (ZnO), a known toxic compound for microalgae, and the never before tested yttrium oxide (Y2O3). The effect of these potential pollutants was estimated for different physiological variables and temporal scales: Growth, carbon content, carbon-to-nitrogen (C:N) ratio, and chlorophyll fluorescence were evaluated in long-term assays, and reactive oxygen species (ROS) production was evaluated in a short-term assay. Population growth was the most susceptible variable to the acute toxic effects of both NPs as measured in terms of number of cells and of biomass. Although Phaeodactylum tricornutum and Alexandrium minutum were negatively affected by ZnO NPs, this effect was not detected in Tetraselmis suecica, in which cell growth was significantly decreased by Y2O3 NPs. Biomass per cell was negatively affected in the most toxic treatments in T. suecica but was positively affected in A. minutum. ZnO treatments induced a sharper decrease in chlorophyll fluorescence and higher ROS than did Y2O3 treatments. The pronounced differences observed in the responses between the species and the physiological variables tested highlight the importance of analyzing diverse groups of microalgae and various physiological levels to determine the potential effects of environmental pollutants.


Microalgae Reactive Oxygen Species Production Y2O3 Phaeodactylum Tricornutum Reactive Oxygen Species Detection 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



We thank Tamara Lozano and Mercedes Peleteiro for advice on flow cytometry. The research leading to these results has received funding from the European Union Seventh Framework Programme (FP7-NMP-SMALL-2) and (FP7/REGPOT-2012-2013.1) under grant agreements HINAMOX-228825 and BIOCAPS-316265, respectively.


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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • Alexandra Castro-Bugallo
    • 1
  • África González-Fernández
    • 2
  • Cástor Guisande
    • 1
  • Aldo Barreiro
    • 3
  1. 1.Department of Ecology and Animal BiologyUniversity of VigoVigoSpain
  2. 2.Biomedical Research Center, Biomedical Research InstituteUniversity of VigoVigoSpain
  3. 3.CIIMAR/CIMAR - Interdisciplinary Centre of Marine and Environmental ResearchUniversity of PortoPortoPortugal

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