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Heiser, Ingrid; Sachs, Edelgard; Liebermann, Bernd
Physiological and molecular plant pathology, 2003, 2003-1-00, 20030101, Letnik: 62, Številka: 1Journal Article
Ramularia collo-cygni, a pathogenic deuteromycete, is the causal agent of Ramularia leaf spot disease on barley. It produces a number of coloured metabolites of which one was identified as rubellin D, a phytotoxin only described for Mycosphaerella rubella until now. Rubellin D induces light- and concentration-dependent necrosis on barley leaves. In a biochemical model system we could demonstrate that rubellin D exhibits photodynamic activity triggering the light-dependent production of reactive oxygen species (ROS). The use of inhibitors of ROS production confirmed mainly the production of singlet oxygen and to a lesser extent superoxide. In addition, light-dependent peroxidation of α-linolenic acid by rubellin D was shown. Based on our results we present a model for ROS-mediated symptom induction on barley leaves by Ramularia collo-cygni.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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