In einem bislang einzigartigen Feldexperiment hat ein internationales Forschungsteam unter Leitung der Goethe-Universität, der University of California, Berkeley, und dem CNRS Montpellier die evolutionäre Anpassung der Ackerschmalwand Arabidopsis thaliana an verschiedensten Klimazonen von den Alpen bis zur Negevwüste untersucht. An weltweit 30 Standorten säten die Teammitglieder die Pflanzen aus, beobachteten deren Entwicklung und werteten genetische Veränderungen aus. Das Ergebnis: Viele Arabidopsis-Populationen passten sich rasch den Klimaverhältnissen an – einige jedoch starben aus. Die Ergebnisse zeigen, wie genetische Vielfalt das Überleben von Populationen sichert. Quelle: IDW Informationsdienst Wissenschaft Hier jetzt das aktuell Außergewöhnliche auswählen …

In an unprecedented field experiment, an international research team led by Goethe University Frankfurt, the University of California, Berkeley, and CNRS Montpellier investigated the evolutionary adaptation of thale cress (Arabidopsis thaliana) to a wide range of climates, from the Alps to the Negev Desert. At 30 locations worldwide, team members sowed the plants, monitored their development, and analyzed genetic changes. The result: many Arabidopsis populations rapidly adapted to local climates – some, however, went extinct. The findings demonstrate how genetic diversity ensures population survival. Quelle: IDW Informationsdienst Wissenschaft Hier jetzt das aktuell Außergewöhnliche auswählen …

Cancer is a group of almost 200 diseases that involve variety of changes in cell structure, morphology, and physiology. Cancer phenotype is underlying several alterations in cellular dynamics with three most critical features, which includes self-sufficiency in growth signals and insensitivity to inhibitory signals, evasion of programmed cell death and limitless replicative potential with a potential for the invasion of other organs. Cancer disease is widespread among metazoans. Some properties of cancer cells such as uncontrolled cell proliferation, lack of apoptosis, hypoxia, fermentative metabolism and free cell motility, i.e. metastasis, resemble a prokaryotic lifestyle, which leads to the assumption of…

Quantum tunnelling is a phenomenon which becomes relevant at the nanoscale and below. It is a paradox from the classical point of view as it enables elementary particles and atoms to permeate an energetic barrier without the need for sufficient energy to overcome it. Tunnelling is being of vital importance for life: physical and chemical processes can be traced directly back to the effects of quantum tunnelling. These processes include the   prebiotic chemistry as well as the function of biomolecular nanomachines and has many highly important implications that can be derived from to the field of molecular, prebiotic chemistry and…