piwik-script

Deutsch
FACULTY OF BIOLOGY

News/Archive

News

Measurements have shown how the hummingbird hawkmoth uses optic flow for flight control and orientation.

How do hawkmoths use visual patterns in different parts of their visual field? While researching this question, a team from the Würzburg Biocentre experienced a surprise.

more
Confocal fluorescence images of glass surfaces coated with the cyanine dyes Alexa Fluor 647 (a) and CF660C (b) and with carborhodamine dye ATTO647N (c) after light excitation at 568 nanometres (nm). By exciting the red-absorbing dyes at 640 nm in certain areas (negative images top right), dyes are photoconverted there and it is possible to write letters on the surface that were excited at 568 nm and fluoresce at about 580 nm. The carborhodamine dye shows more efficient photobluing than the cyanine dyes.

An undesirable effect can occur in super-resolution fluorescence microscopy: photoblueing. A new publication in „Nature Methods“ shows how it can be prevented or made useful for research.

more
With two additional genes for the enzyme dioxygenase and the light-controlled anion channel ACR1, the tobacco plant can channel salt ions across the cell membrane when exposed to green light. The success can be seen in the experiment: While pollen tubes normally grow in the direction of the egg cell for fertilization, in genetically modified cells they change the direction of growth depending on the exposure to light.

Optogenetics can be used to activate and study cells in a targeted manner using light. Scientists at the University of Würzburg have now succeeded in transferring this technique to plants.

more
Survival curve of the TH-MYCN mouse model during long-term treatment with Aurora-A inhibitor (purple), ATR inhibitor (blue) or the combination of both agents (red). It is clearly visible that the combination therapy prolongs survival time.

With two commercially available inhibitors, the cell cycle of the cancer cells in the childhood tumour neuroblastoma can be disrupted at a key point causing tumour cell death.

more
Women meditating in front of a full moon.

Does the moon affect women's menstrual cycles? This question has been controversial for a long time. A new study by chronobiologists from Würzburg now suggest that such an influence does exist. It's complicated, though.

more
Normal and malformed leaves oft the Australian pitcher plant.

Climate change may challenge organismal responses through not only extreme cues. An uncommon combination of benign cues – warm and short days – can also trigger reactions such as misregulations of leaves.

more
The Venus flytrap has a unique arrangement of its vascular tissue (centre). This network enables the plant to process fast stimuli, similar to the nervous system of animals. Now it has been possible to investigate these stimuli without contact using novel magnetic field detectors (right).

The carnivorous Venus flytrap can generate magnetic fields that are almost as strong as those in humans. Researchers from Mainz and Würzburg have demonstrated this with a new, non-invasive measuring technique.

more
Fins of the Australian lungfish

The Australian lungfish replaces the Mexican axolotl as holding the record for the "largest genome in the animal kingdom". Its genome shows the evolutionary innovations that made living on land possible.

more
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.

more
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.

more

Events

PHD defense Yang Zhou; Fakultät für Biologie

“The exploitation of opsin-based optogenetic tools for applicaion in higher plants"

04/30/2021, 10:00 AM - 11:00 AM
Logo Biozentrum der Universität Würzburg
Category: Fakultät für Biologie, Kalender-JMU, Kolloquium, Promotionskolloquium
Location: Seminarpavillon des Julius-von-Sachs-Instituts
Organizer: Fakultät für Biologie, via Zoom
Speaker: Yang Zhou, M. Sc.