Authors: SeonHee Hwang In Ah Lee Se Won Yie DukJu Hwang
Publish Date: 2008/01/12
Volume: 227, Issue: 5, Pages: 1141-1150
Abstract
Orysa sativa pathogenesisrelated protein 10a OsPR10a was induced by pathogens salicylic acid SA jasmonic acid JA ethephon abscisic acid ABA and NaCl We tried to analyze the OsPR10a promoter to investigate the transcriptional regulation of OsPR10a by SA We demonstrated the inducibility of OsPR10a promoter by SA using transgenic Arabidopsis carrying OsPR10aGFP as well as by transient expression assays in rice To further identify the promoter region responsible for its induction by SA four different deletions of the OsPR10a promoter were made and their activities were measured by transient assays The construct containing 687bp OsPR10a promoter from its start codon exhibited a sixfold increase of induction compared to the control in response to SA Mutation in the Wbox like element 1 WLE 1 between 687 and 637bp from TGACA to TGAAA completely abolished induction of the OsPR10a promoter by SA indicating that the WLE 1 between −687 and −637 of OsPR10a promoter is important in SAmediated OsPR10a expression We show for the first time that the Wbox like element plays a role in SA mediated PR gene expression
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