Analysis of spermine-signaling pathway in Arabidopsis thaliana

Abstract

Plants have evolutionally acquired many strategies to defend pathogens. The hypersensitive response (HR) is one of them. In the event, small defense signaling molecules such as salicylic acid, jasmonic acid and ethylene have been identified. Currently we propose that the polyamine spermine (Spm) acts as a signal transmitter during the HR induced by Tobacco mosaic virus.
To understand a generality of Spm-signaling pathway and reveal its pathway extensively, here we report on the identification of Spm-responsive genes in Arabidopsis thaliana using super serial analysis of gene expression technique. Most of the Spm-responsive genes respond during Cucumber mosaic virus-elicited HR in A. thaliana. Based on the results, we argue a physiological role of Spm-signaling pathway in Arabidopsis.