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The Pressure Sensor of the Venus Flytrap

12/11/2020
Open trap of Dionaea muscipula with potential prey. Middle: basal part of a trigger hair, where action potentials are elicited in the sensory cells upon touch stimulation. During the late phase of the action potential, potassium ions need to be reimported into the sensory cells via KDM1 to enable the generation of consecutive action potentials.

The display of a smartphone reacts to finger pressure. The carnivorous Venus flytrap, on the other hand, even notices when a lightweight like a fly lands on it. Special genes make this possible.

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The secret behind male ornaments

12/10/2020
The longer the sword of the male (bottom), the greater the chances of its bearer being interested by a female (top). In the swordtail fish (Xiphophorus hellerii), scientists have now identified the genetic basis of sword growth. (Image: Georg Schneider / University of Würzburg)

In many species all over the animal kingdom, males have eye-catching characteristics. Although often impractical, they are beneficial in finding a mate. Scientists have now mapped the genetic bases of such a male ornament in a fish.

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Cell Membranes in Super Resolution

12/02/2020
Sphingolipid expansion microscopy (ExM) of tenfold expanded cells infected with chlamydia. The bacterial membranes are marked green; the inner and outer membranes of the bacteria can be distinguished (c). Under (a) confocal laser scanning and under (b) structured illumination microscopy (SIM). Scale bars: 10 and 2 microns in the small white rectangles respectively.

For the first time ever, expansion microscopy allows the imaging of even the finest details of cell membranes. This offers new insights into bacterial and viral infection processes.

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