Short oligogalacturonides induce pathogen resistance-associated gene expression in Arabidopsis thaliana

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http://hdl.handle.net/10138/178839

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Davidsson , P R , Broberg , M , Kariola , T J , Sipari , N H , Pirhonen , M U & Palva , E T 2017 , ' Short oligogalacturonides induce pathogen resistance-associated gene expression in Arabidopsis thaliana ' , BMC Plant Biology , vol. 17 , no. 19 , 19 . https://doi.org/10.1186/s12870-016-0959-1

Title: Short oligogalacturonides induce pathogen resistance-associated gene expression in Arabidopsis thaliana
Author: Davidsson, Pär Roland; Broberg, Martin; Kariola, Tarja Johanna; Sipari, Nina Hannele; Pirhonen, Minna Ursula; Palva, Erkki Tapio
Contributor: University of Helsinki, Biosciences
University of Helsinki, Bangor Univ, Bangor University, Coll Nat Sci, Sch Biol Sci
University of Helsinki, Biosciences
University of Helsinki, Biosciences
University of Helsinki, Department of Agricultural Sciences
University of Helsinki, Biosciences
Date: 2017-01-19
Language: eng
Number of pages: 17
Belongs to series: BMC Plant Biology
ISSN: 1471-2229
URI: http://hdl.handle.net/10138/178839
Abstract: Background Oligogalacturonides (OGs) are important components of damage-associated molecular pattern (DAMP) signaling and influence growth regulation in plants. Recent studies have focused on the impact of long OGs (degree of polymerization (DP) from 10–15), demonstrating the induction of plant defense signaling resulting in enhanced defenses to necrotrophic pathogens. To clarify the role of trimers (trimeric OGs, DP3) in DAMP signaling and their impact on plant growth regulation, we performed a transcriptomic analysis through the RNA sequencing of Arabidopsis thaliana exposed to trimers. Results The transcriptomic data from trimer-treated Arabidopsis seedlings indicate a clear activation of genes involved in defense signaling, phytohormone signaling and a down-regulation of genes involved in processes related to growth regulation and development. This is further accompanied with improved defenses against necrotrophic pathogens triggered by the trimer treatment, indicating that short OGs have a clear impact on plant responses, similar to those described for long OGs. Conclusions Our results demonstrate that trimers are indeed active elicitors of plant defenses. This is clearly indicated by the up-regulation of genes associated with plant defense signaling, accompanied with improved defenses against necrotrophic pathogens. Moreover, trimers simultaneously trigger a clear down-regulation of genes and gene sets associated with growth and development, leading to stunted seedling growth in Arabidopsis. Keywords Plant signaling Arabidopsis thaliana Oligogalacturonides OG Trimers Transcriptomics Defense induction Growth inhibition Disease resistance Pectobacterium carotovorum Botrytis cinerea
Subject: 1183 Plant biology, microbiology, virology
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