Plant Biotechnology
Online ISSN : 1347-6114
Print ISSN : 1342-4580
ISSN-L : 1342-4580
Original Papers
Overexpression of DWARF AND LESION FORMATION 1 (DLE1) causes altered activation of plant defense system in Arabidopsis thaliana
Youichi KondouKosuke NoguchiShinsuke KutsunaMika KawashimaArata YonedaMio IshibashiShu MutoTakanari IchikawaMiki NakazawaMinami MatsuiKatsushi Manabe
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Keywords: ER, HR, PR genes

2013 Volume 30 Issue 4 Pages 385-392


A novel gain-of-function mutant showing dwarfism and bushy inflorescences was isolated from Arabidopsis activation-tagging lines. Transformed plants, in which the gene responsible for the phenotype of the mutant was overexpressed, exhibited phenotypes similar to constitutive systematic acquired resistance (SAR)-like defense responses including simulation of lesions in leaves and a highly activated PATHOGENESIS-RELATED 1 gene. We, therefore, designated the gene as DWARF AND LESION FORMATION 1 (DLE1) and showed it encodes a DUF 247 protein. Microarray and gene ontology analyses revealed that defense response genes, especially to biotic stimulus, were enriched in DLE1 overexpressing plants. Fusion proteins of the N-terminal fragment of DLE1 and GFP were likely to be localized in the endoplasmic reticulum (ER) in tobacco BY-2 cells. DLE1 may function in the plant defense system responding to environmental stimuli including biotic stresses in the ER.

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© 2013 by Japanese Society for Plant Cell and Molecular Biology
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