1. Degradation of N-acyl homoserine lactone quorum sensing signal molecules by forest root-associated fungi.
- Author
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Uroz, Stephane and Heinonsalo, Jussi
- Subjects
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MYCORRHIZAL fungi , *PLANT root physiology , *FOREST fungi , *QUORUM sensing , *CHROMOBACTERIUM violaceum , *LACTONES , *AGROBACTERIUM tumefaciens , *PLANT physiology & genetics , *PLANT molecular genetics - 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. [ABSTRACT FROM AUTHOR]
- Published
- 2008
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