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Homoserine lactones influence the reaction of plants to Rhizobia

Zarkani, Azhar A. ; Stein, Elke ; Röhrich, Christian R. ; Schikora, Marek ; Evguenieva-Hackenberg, Elena ; Degenkolb, Thomas ; Vilcinskas, Andreas ; Klug, Gabriele ; Kogel, Karl-Heinz ; Schikora, Adam


Originalveröffentlichung: (2013) International Journal of Molecular Sciences 14(8):17122-17146 doi:10.3390/ijms140817122
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URN: urn:nbn:de:hebis:26-opus-104259
URL: http://geb.uni-giessen.de/geb/volltexte/2013/10425/

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Freie Schlagwörter (Englisch): quorum sensing , induced resistance , plant-bacteria interaction , homoserine lactones
Sammlung: Open Access - Publikationsfonds
Universität Justus-Liebig-Universität Gießen
Fachgebiet: Agrarwissenschaften und Umweltmanagement
DDC-Sachgruppe: Landwirtschaft
Dokumentart: Aufsatz
Sprache: Englisch
Erstellungsjahr: 2013
Publikationsdatum: 06.12.2013
Kurzfassung auf Deutsch: Bacterial quorum sensing molecules not only grant the communication within
bacterial communities, but also influence eukaryotic hosts. N-acyl-homoserine lactones
(AHLs) produced by pathogenic or beneficial bacteria were shown to induce diverse
reactions in animals and plants. In plants, the reaction to AHLs depends on the length of
the lipid side chain. Here we investigated the impact of two bacteria on
Arabidopsis thaliana, which usually enter a close symbiosis with plants from the Fabaceae
(legumes) family and produce a long-chain AHL (Sinorhizobium meliloti) or a short-chain
AHL (Rhizobium etli). We demonstrate that, similarly to the reaction to pure AHL
molecules, the impact, which the inoculation with rhizosphere bacteria has on plants,
depends on the type of the produced AHL. The inoculation with oxo-C14-HSL-producing
S. meliloti strains enhanced plant resistance towards pathogenic bacteria, whereas the
inoculation with an AttM lactonase-expressing S. meliloti strain did not. Inoculation with
the oxo-C8-HSL-producing R. etli had no impact on the resistance, which is in agreement
with our previous hypothesis. In addition, plants seem to influence the availability of AHLs
in the rhizosphere. Taken together, this report provides new insights in the role of
N-acyl-homoserine lactones in the inter-kingdom communication at the root surface.
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