Degradation of N-acyl homoserine lactone quorum sensing signal molecules by forest root-associated fungi |
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Authors: | Uroz Stephane Heinonsalo Jussi |
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Affiliation: | INRA/UHP UMR 1136 Interactions Arbres Micro-organismes, Centre INRA de Nancy, Champenoux, France. uroz@nancy.inra.fr |
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Abstract: | 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 forest root-associated fungi are capable of degrading the AHL signal molecules. |
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Keywords: | N-acyl homoserine lactone AHL degradation forest root associated fungi quorum sensing lactonase |
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