Degradation of N-acyl homoserine lactone quorum sensing signal molecules by forest root-associated fungi
2008
Uroz, Stéphane | Heinonsalo, Jussi | Interactions Arbres-Microorganismes (IAM) ; Institut National de la Recherche Agronomique (INRA)-Université de Lorraine (UL) | Helsingin yliopisto = Helsingfors universitet = University of Helsinki
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Show more [+] Less [-]English. A collection of mycorrhizal and nonmycorrhizal root-associated fungi coming from forest environments was screened for their ability to degrade N-acyl homoserine lactones (AHL) or to prevent AHL recognition by producing quorum sensing inhibitors (QSI). No production of QS-inhibitors or -activators was detected using the two biosensors Chromobacterium violaceum CV026 and Agrobacterium tumefaciens in the culture supernatant of these fungi. However, the ability to degrade C6- and 3O,C6-HSL was detected for three fungal isolates. Acidification assay revealed that the AHL were degraded by a lactonase activity for two of these isolates. These results demonstrated for the first time that the forestroot-associated fungi are capable of degrading the AHL signal molecules.
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