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Topics in September

Sep 12, 2016

When the Biological Clock of Plants Is Disturbed

When the light-dark rhythm of plants is disturbed, a defect of the circadian clock or too little of the plant hormone cytokinin causes cell death in the model plant Arabidopsis (thale cress). At left, a non-stressed plant; at right, a stressed plant.

Biologists at Freie Universität discovered how a hormone affects the circadian clock of plants

Plants coordinate their physiological and developmental processes over the course of the day. Scientists at the Dahlem Center of Plant Sciences (DCPS), Freie Universität, recently discovered a new form of stress in plants that they have named circadian stress. Their findings indicate that it is caused by a change in the day-night rhythm. The plant hormone cytokinin plays an important role in protecting the plants against this stress.

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Keeping Memory Alive

People were killed during attempts to cross the border between East and West Germany. Their biographies have now been studied at Freie Universität.

Research project at Freie Universität presents victims of the East German border regime and their biographies; commemorative book currently being prepared

In February 1987, restaurant operator Detlef Armstark, then 26, had run up so much debt that the East German state-owned wholesale company no longer wanted to deliver to him. He was also listed by the East German secret police, the Stasi, in their “Vorverdichtungs-, Such- und Hinweiskartei” (literally “pre-compilation, search, and reference file”), which contained information on certain individuals. Armstark was convinced that he no longer had a future ahead of him in the German Democratic Republic, so he decided to flee.

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It’s Not Just the Genes

Junior professor Sarah Hedtrich studies the causes of atopic dermatitis at the Institute of Pharmacy at Freie Universität.

Pharmacologist Sarah Hedtrich studies the causes of atopic dermatitis and has just won an award for her work.

Atopic dermatitis is a disease that is difficult to study because it has many different causes and not all of them are known. There is no way to prevent the disease, and very little clarity has been achieved to date regarding its mechanisms. But Sarah Hedtrich, a junior professor with a doctorate in pharmacology, could help to change that soon: She has been able to show that genetic causes play less of a role in the emergence of atopic dermatitis than had previously been believed. Hedtrich has received the “Research On Skin-Dryness Award” (R.O.S.A.) for her research.

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