Homoserine Lactones Influence the Reaction of Plants to Rhizobia

International Journal of Molecular Sciences

Azhar A. Zarkani³  Elke Stein³  Christian R. Röhrich⁴  Marek Schikora²  Elena Evguenieva-Hackenberg¹  Thomas Degenkolb³  Andreas Vilcinskas³  Gabriele Klug¹  Karl-Heinz Kogel³ 

[1] Institute of Microbiology and Molecular Biology, Centre for BioSystems, Land Use and Nutrition, Justus Liebig University Giessen, Heinrich-Buff-Ring 26-32, D-35392 Giessen, Germany; E-Mails:;Department Sensor Data and Information Fusion, Fraunhofer FKIE, 53343 Wachtberg, Germany; E-Mail:;Institute of Phytopathology and Applied Zoology, Centre for BioSystems, Land Use and Nutrition, Justus Liebig University Giessen, Heinrich-Buff-Ring 26-32, D-35392 Giessen, Germany; E-Mails:;Fraunhofer Institute for Molecular Biology and Applied Ecology (IME), Bioresources Project Group, Winchesterstrasse 2, D-35394 Giessen, Germany; E-Mail:

关键词: quorum sensing;    induced resistance;    plant-bacteria interaction;    homoserine lactones;   

DOI  :  10.3390/ijms140817122

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland