Berlin 2018 – wissenschaftliches Programm
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BP: Fachverband Biologische Physik
BP 10: Postersession II
BP 10.37: Poster
Montag, 12. März 2018, 17:30–19:30, Poster C
Light-Switchable Adhesion of Soil-Dwelling Microalgae — •Christian Titus Kreis1, Christine Linne1, Marine Le Blay1, Alice Gragnier1, Marcin Michal Makowski1, Maike Lorenz2, and Oliver Bäumchen1 — 1Max Planck Institute for Dynamics and Self-Organization (MPIDS), Am Faßberg 17, D-37077 Göttingen, Germany — 2SAG Culture Collection of Algae, Nikolausberger Weg 18, D-37073 Göttingen, Germany
Freshwater microalgae live in heterogeneous, aqueous habitats, such as soil, aquatic sediments, puddles, and lakes. Besides having fundamental ecological functions and enormous technological potential in photobioreactors, microalgae form biofilms on surfaces in wet environments, which may affect the functionality of any anthropogenic structures. Despite the relevance of controlling microalgal adhesion, the biological mechanisms and intermolecular forces that govern microalgal adhesion to surfaces are poorly understood. We discovered in micropipette-based in vivo force spectroscopy that the adhesion of the unicellular microalgae Chlamydomonas reinhardtii to surfaces can be reversibly switched on and off by tailoring the light conditions [1]. Here, we present results on the underlying molecular mechanism of light-switchable flagella-mediated adhesion. Additionally, we performed experiments with other unicellular microalgae indicating that actively controlled flagella adhesiveness might be a more generic trait of soil-dwelling microalgae.
[1] Kreis et al., Nature Physics, 2017, doi:10.1038/nphys4258.