The interaction of Arabidopsis with Piriformospora indica shifts from initial transient stress induced by fungus-released chemical mediators to a mutualistic interaction after physical contact of the two symbionts

BMC Plant Biology

Research Article

Irena Sherameti¹  Anatoli Ludwig¹  Ralf Oelmüller¹  Madhunita Bakshi¹  Anna Mrozinska¹  Khabat Vahabi¹  Michael Reichelt² 

[1] Institute of General Botany and Plant Physiology, Friedrich-Schiller-University Jena, Dornburger Str. 159, 07743, Jena, Germany;Max-Planck Institute for Chemical Ecology, Hans-Knöll-Straße 8, 07745, Jena, Germany;

关键词: Microarray;    Transcriptome;    Defense;    Mutualism;    Stomata;    Reactive oxygen species;    Phytohormones;   

DOI  :  10.1186/s12870-015-0419-3

 received in 2014-10-03, accepted in 2015-01-08,  发布年份 2015

来源: Springer

【 摘 要 】

BackgroundPiriformospora indica, an endophytic fungus of Sebacinales, colonizes the roots of many plant species including Arabidopsis thaliana. The symbiotic interaction promotes plant performance, growth and resistance/tolerance against abiotic and biotic stress.ResultsWe demonstrate that exudated compounds from the fungus activate stress and defense responses in the Arabidopsis roots and shoots before the two partners are in physical contact. They induce stomata closure, stimulate reactive oxygen species (ROS) production, stress-related phytohormone accumulation and activate defense and stress genes in the roots and/or shoots. Once a physical contact is established, the stomata re-open, ROS and phytohormone levels decline, and the number and expression level of defense/stress-related genes decreases.ConclusionsWe propose that exudated compounds from P. indica induce stress and defense responses in the host. Root colonization results in the down-regulation of defense responses and the activation of genes involved in promoting plant growth, metabolism and performance.

【 授权许可】

Unknown   
© Vahabi et al.; licensee BioMed Central. 2015. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.