Bernd Liebermann

TL;DR: A model for ROS-mediated symptom induction on barley leaves by Ramularia collo-cygni is presented and photodynamic activity of rubellin D triggering the light-dependent production of reactive oxygen species (ROS) is demonstrated.

TL;DR: It is shown that rubellin D induces the peroxidation of α-linolenic acid, measured as ethane formation, in a biochemical model system as well as in barley and tobacco leaves and the possible role of rubell in production in symptom development after R. collo-cygni infection is discussed.

TL;DR: Ten metabolites, named tricycloalternarenes, were isolated from the culture filtrate of the phytopathogenic fungus, Alternaria alternata, and their structures elucidated by spectroscopic methods, and seven compounds are described for the first time.

TL;DR: The first isolation of the anthrachinone derivative rubellin A out of mycelium and culture filtrate of Ramularia collo-cygni showed that such anthraquinone derivatives were biosynthesised via the polyketide pathway and the existence of fungal folding mode of the poly-beta-keto chain.

TL;DR: Eleven compounds, ACTG toxins A and B and nine new substances named bicycloalternarenes (BCAs) were isolated and characterized from the culture filtrate of the phytopathogenic fungus Alternaria alternata and under acidic conditions, these mixed terpenoids convert to pairs of tricycloaltenarenes that can be used for identification of the native compounds.