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Albert-Ludwigs-Universität Freiburg Friedrichstraße 39 79085 Freiburg, Germany http://www.uni-freiburg.de
Contact Mr Prof. Dr. Dr. Klaus Aktories +49 761 2035301
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Albert-Ludwigs-Universität Freiburg

Biogene Insektizide entschlüsselt

Freiburger Forscher entdecken Wirkmechanismus insektizider Toxine

(PresseBox) (Freiburg, )
Forscher der Universität Freiburg berichten in dem führenden Wissenschaftsmagazin Science (Band 327, S. 1139-1142) von der Entdeckung eines neuen Wirkmechanismus insektizider Toxine aus Photorhabdus luminescens, einem Keim der symbiotisch mit Nematoden lebt. Die winzigen Würmer dringen durch natürliche Öffnungen in Insektenlarven ein, wo sie die Bakterien gewissermaßen wieder "herauswürgen". Bakterielle Toxine, die von den Lichtaussendenden Keimen produziert werden, töten die Insektenlarven (siehe Abbildung) und schaffen dadurch ein großes Nahrungsreservoir für die Vermehrung von Nematoden und Bakterien. Deshalb werden die Würmer mit ihren Bakterien als biogene Insektizide eingesetzt.

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