Associate professor, Pontificia Universidad de Chile (UC)

Maître de Conférence à la Pontificia Universidad de Chile (UC)

Dr. v0n Dassow is an Associate Professor  at the Department of Ecology in the Faculty of Biological Sciences of the Pontificia Universidad Católica de Chile. As well, he participates in the international GDRI network on “Diversity, Evolution and Biotechnology of Marine Algae” involving France, Brazil, and Chile, and the international research unit UMI 3614 “Evolutionary Biology and Ecology of Algae” with researchers in France and Chile.

Main interests

Dr. von Dassow has a longstanding interest in the activity of phytoplankton cells in addition to photosynthesis. During his doctoral studies he researched the regulation of the bioluminescence of dinoflagellates.  He showed that these cells regulate an anti-predator luminous response with a sophisticated mechanical-sensory system based on the intracellular concentration of calcium ions.  He has since specialized in the life cycles and genomic evolution of phytoplankton, especially diatoms and cocolithophorids.  While studying the life cycle of diatoms, he discovered that the evolution of cell size in this group is related to abrupt changes in the quantity of DNA per cell, apparently due to polyploidization and aneuploidization. With cocolithophorids, Dr. von Dassow has worked specifically in defining how gene expression differs among the distinct phases in the life cycle. Finally, he has participated in several international consortiums working on the analysis and annotation of the genomes of eukaryotic phytoplankton (diatoms, cocolithophorids, prasinophytes) and a brown microalgae.

The focus of his research with the IMO is the life cycles and genomic evolution of phytoplankton and the development of advanced cytometric and phytoplankton culturing techniques for laboratory study.

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Publications

Publications 2017

Alves-de-Souza, C., Benevides, T. S., Santos, J. B. O., von Dassow, P., Guillou, L., Menezes, M. Accepted with revision. Does environmental heterogeneity explain temporal β diversity of small eukaryotic phytoplankton? Example from a tropical eutrophic coastal lagoon. Journal of Plankton Research.

Jacob, B., von Dassow, P., Salisbury, J., Navarro, J., Vargas, C. A. 2016. Impact of low pH/high pCO2 on the physiological response and fatty acid content in diatom Skeletonema pseudocostatum. Journal of the Marine Biological Association of the UK. Advanced online publication Nov. 2016.

Publications 2016

Rokitta, S. D., von Dassow, P., Rost, B., John, U. 2016. P- and N-starvation trigger the same cellular responses to promote senescence in eukaryotic phytoplankton. Frontiers in Marine Science. 3:109.

Bendif, E.-M., Probert, I., Díaz-Rosas, F., Thomas, D., van den Engh, G. Young, J., von Dassow, P.*. 2016. Recent reticulate evolution in the ecologically dominant lineage of coccolithophores. Frontiers in Microbiology. 7:784.

Publications 2015

Patil, S., Moeys, S., von Dassow, P., Huysman, M. J. J., Mapleson, D., De Veylder, L., Sanges, R., Vyverman, W., Montresor, M., Ferrante, M. I. 2015. Identification of the meiotic toolkit in diatoms and exploration of meiosis-specific SPO11 and RAD51 homologs in the sexual species Pseudo-nitzschia multistriata and Seminavis robusta. BMC Genomics. 16:930.

Bendif, E.-M., Probert, I., Young, J., von Dassow, P. 2015. Morphogenetic characterization of new Gephyrocapsa isolates suggests introgressive hybridization in the Emiliania/Gephyrocapsa complex (Haptophyta). Protist. 166: 323-366.

von Dassow, P., John, U., Ogata, H., Probert, I., Bendif, E.-M., Kegel, J. U., Audic, S., Wincker, P., Da Silva, C., Claverie, J.-M., Doney, S., Glover, D. M., Mella Flores, D., Herrera, Y., Lescot, M., Garet-Delmas, M.-J., de Vargas, C. 2015. Life cycle modification in open oceans accounts for genome variability in a cosmopolitan phytoplankton. ISME Journal 9:1365-1377. doi:10.1038/ismej.2014.221.

Publications 2014

Rokitta, S. D., von Dassow, P., Rost, B., John, U. 2014. Emiliania huxleyi endures N-limitation with an efficient metabolic budgeting and effective ATP Synthesis. BMC Genomics. 15: 1051. http://www.biomedcentral.com/1471-2164/15/1051.

von Dassow, P., Collado, S. 2014. The biological oceanography, biogeochemical cycles, and pelagic ecosystem functioning of the east-central South Pacific Gyre: Focus on Easter Island and Sala-y-Gómez. Latin American Journal of Aquatic Resarch. 42(4): 703-742. DOI: 10.3856/vol42-issue4-fulltext-4.

Oppliger, L., von Dassow, P., Bouchemousse, S., Valero, M., Correa, J., Mauger, S., Destombe, C. 2014. Alteration of sexual reproduction and genetic diversity in the kelp species Laminaria digitata at the southern limit of its range. PLoS ONE 9(7): e102518. doi: 10.1371/journal.pone.0102518