Articles | Volume 17, issue 4
Biogeosciences, 17, 995–1011, 2020
https://doi.org/10.5194/bg-17-995-2020
Biogeosciences, 17, 995–1011, 2020
https://doi.org/10.5194/bg-17-995-2020

Research article 25 Feb 2020

Research article | 25 Feb 2020

SiR-actin-labelled granules in foraminifera: patterns, dynamics, and hypotheses

Jan Goleń et al.

Video supplement

Actin cytoskeleton in lamellipodia of living Ammonia sp. (Foraminifera) Jan Goleń, Jarosław Tyszka, Ulf Bickmeyer, and Jelle Bijma https://doi.org/10.5446/45179

Actin cytoskeleton and mitochondria in a newly formed chamber in Amphistegina lessonii Jan Goleń, Jarosław Tyszka, Ulf Bickmeyer, and Jelle Bijma https://doi.org/10.5446/45180

Actin cytoskeleton in a thick pseudopodial thread of living Amphistegina lessonii (Foraminifera) Jan Goleń, Jarosław Tyszka, Ulf Bickmeyer, and Jelle Bijma https://doi.org/10.5446/45181

Measurement of velocity of SiR-actin-labelled granules (ALGs) in pseudopodia of Amphistegina lessonii (Foraminifera) Jan Goleń, Jarosław Tyszka, Ulf Bickmeyer, and Jelle Bijma https://doi.org/10.5446/45182

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Short summary
We studied the organisation and dynamics of actin in foraminifera. Actin is one of the key structural proteins in most lifeforms. Our investigations show that in foraminifera it forms small granules, around 1 µm in diameter, that display rapid movement. This granularity is unusual in comparison to other organisms. We suppose that these granules are most likely involved in the formation of all types of pseudopods responsible for movement, food capturing, biomineralisation, and other functions.
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