Arabidopsis FLOWERING LOCUS D influences systemic-acquired-resistance-induced expression and histone modifications of WRKY genes

A plant that is in part infected by a pathogen is more resistant throughout its whole body to subsequent infections – a phenomenon known as systemic acquired resistance (SAR). Mobile signals are synthesized at the site of infection and distributed throughout the plant through vascular tissues. Mecha...

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Bibliographic Details
Published in:Journal of biosciences 2014-03, Vol.39 (1), p.119-126
Main Authors: Singh, Vijayata, Roy, Shweta, Singh, Deepjyoti, Nandi, Ashis Kumar
Format: Article
Language:English
Subjects:
Arabidopsis - genetics
Arabidopsis - immunology
Arabidopsis - metabolism
Arabidopsis Proteins - metabolism
Biomedical and Life Sciences
Biomedicine
Cell Biology
Chromatin Immunoprecipitation
Disease Resistance - genetics
Drug resistance
Epigenetics
Eukaryotes
Gene expression
Gene Expression Regulation, Plant - physiology
Green Fluorescent Proteins
Histone Deacetylases - metabolism
Histones - metabolism
Life Sciences
MADS Domain Proteins - metabolism
Microbiology
Plant Diseases - immunology
Plant pathology
Plant Sciences
Plant tissues
Proteins
Reverse Transcriptase Polymerase Chain Reaction
Transcription Factors - metabolism
Zoology
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Summary:A plant that is in part infected by a pathogen is more resistant throughout its whole body to subsequent infections – a phenomenon known as systemic acquired resistance (SAR). Mobile signals are synthesized at the site of infection and distributed throughout the plant through vascular tissues. Mechanism of SAR development subsequent to reaching the mobile signal in the distal tissue is largely unknown. Recently we showed that FLOWERING LOCUS D ( FLD ) gene of Arabidopsis thaliana is required in the distal tissue to activate SAR. FLD codes for a homologue of human-lysine-specific histone demethylase. Here we show that FLD function is required for priming (SAR induced elevated expression during challenge inoculation) of WRKY29 and WRKY6 genes. FLD also differentially influences basal and SAR-induced expression of WRKY38 , WRKY65 and WRKY53 genes. In addition, we also show that FLD partly localizes in nucleus and influences histone modifications at the promoters of WRKY29 and WRKY6 genes. The results altogether indicate to the possibility of FLD’s involvement in epigenetic regulation of SAR.
ISSN:0250-5991
0973-7138
DOI:10.1007/s12038-013-9407-7