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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 22: Active Matter 3 (joint session BP/CPP/DY)

CPP 22.10: Vortrag

Mittwoch, 7. September 2022, 12:15–12:30, H16

Intercellular transport in Chara corallina — •Florian von Rüling¹, Anna Alova², Alexander Bulychev², and Alexey Eremin¹ — ¹Otto von Guericke University Magdeburg, Germany — ²Moscow, Russia

We explore the kinetics of the intercellular transport between the giant cells of characean algae. The transport involves advection via cytoplasmic streaming and diffusion through the plasmodesmata, pores that penetrate the cell walls. Using fluorescent dye as a tracer, we measure the permeation through the node of tandem cells. The permeability is extracted from the experimental data using an advection-diffusion model. The current work is focused on the roles of cytoplasmic streaming and the nodal cells in the transport mechanism. To separate the diffusive permeation from the advective contribution, cyclosis was temporarily inhibited using action potentials. Streaming cessation results in dye accumulation in the vicinity of the node. The shape of regions with high dye concentration indicates that action potentials may induce closure of the plasmodesmata in central nodal cells.