Uptake of non-pathogenic E. coli by Arabidopsis induces downregulation of heat shock proteins

Paungfoo-Lonhienne, Chanyarat, Schmidt, Susanne and Lonhienne, Thierry G. A. (2010) Uptake of non-pathogenic E. coli by Arabidopsis induces downregulation of heat shock proteins. Plant Signaling and Behavior, 5 12: 1626-1628. doi:10.4161/psb.5.12.13760

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Author Paungfoo-Lonhienne, Chanyarat
Schmidt, Susanne
Lonhienne, Thierry G. A.
Title Uptake of non-pathogenic E. coli by Arabidopsis induces downregulation of heat shock proteins
Formatted title
Uptake of non-pathogenic E. coli by Arabidopsis induces downregulation of heat shock proteins
Journal name Plant Signaling and Behavior   Check publisher's open access policy
ISSN 1559-2316
1559-2324
Publication date 2010-12-01
Year available 2010
Sub-type Article (original research)
DOI 10.4161/psb.5.12.13760
Open Access Status PMC
Volume 5
Issue 12
Start page 1626
End page 1628
Total pages 3
Editor František Baluška
Stefano Mancuso
Tony Trewavas
Dieter Volkmann
Place of publication Austin, TX, U.S.A.
Publisher Landes Bioscience
Language eng
Subject 1110 Plant Science
Abstract We recently demonstrated that nonpathogenic and non-symbiotic microbes E. coli and yeast are taken up by roots and used as a source of nutrients by the plant. Although this process appears to be beneficial for the plant, the nutritional gain of microbe incorporation has to exceed the energy expense of microbe uptake and digestion, and the question remains whether the presence of microbes triggers pathogen-and other stress-induced responses. Here, we present evidence that digesting microbes is accompanied by strong downregulation of genes linked to stress response in Arabidopsis. Genome-wide transcription analysis shows that uptake of E. coli by Arabidopsis roots is accompanied by a pronounced downregulation of heat shock proteins. Plants upregulate heat shock proteins in response to environmental stresses including temperature, salt, light and disease agents including microbial pathogens. The pronounced downregulation of heat shock proteins in the presence of E. coli indicates that uptake and subsequent digestion of microbes does not induce stress. Additionally it suggests that resources devoted to stress resistance in control plants may be re-allocated to the process of microbe uptake and digestion. This observation adds evidences to the notion that uptake of microbes is an active, purposeful and intentional behavior of the plant.
Formatted abstract
We recently demonstrated that non-pathogenic and non-symbiotic microbes E. coli and yeast are taken up by roots and used as a source of nutrients by the plant. Although this process appears to be beneficial for the plant, the nutritional gain of microbe incorporation has to exceed the energy expense of microbe uptake and digestion, and the question remains whether the presence of microbes triggers pathogen- and other stress-induced responses. Here, we present evidence that digesting microbes is accompanied by strong down-regulation of genes linked to stress response in Arabidopsis. Genome-wide transcription analysis shows that uptake of E. coli by Arabidopsis roots is accompanied by a pronounced down-regulation of heat shock proteins. Plants up-regulate heat shock proteins in response to environmental stresses including temperature, salt, light and disease agents including microbial pathogens. The pronounced down-regulation of heat shock proteins in the presence of E. coli indicates that uptake and subsequent digestion of microbes does not induce stress. Additionally it suggests that resources devoted to stress resistance in control plants may be re-allocated to the process of microbe uptake and digestion. This observation adds evidences to the notion that uptake of microbes is an active, purposeful and intentional behavior of the plant.
© 2010 Landes Bioscience
Keyword Heat shock proteins
Arabidopsis
Plant-microbe interactions
Stress response
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Published under "Article Addenda". Cited in Contents as pp.1616-1618.

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2011 Collection
School of Biological Sciences Publications
 
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Created: Wed, 09 Mar 2011, 00:47:46 EST by Dr Susanne Schmidt on behalf of School of Biological Sciences