Plant Biotechnology Reports

The Korean Society of Plant Biotechnology (한국식물생명공학회)
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Isolation and characterization of the rice NPR1 promoter

  • Hwang, Seon-Hee (National Academy of Agricultural Sciences, Rural Development Administration) ;
  • Hwang, Duk-Ju (National Academy of Agricultural Sciences, Rural Development Administration)
  • Received : 2009.09.28
  • Accepted : 2009.11.06
  • Published : 2010.03.30
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Abstract

NPR1 is a positive regulator of systemic acquired resistance in Arabidopsis and rice. Expression of the rice gene OsNPR1 is induced by salicylic acid (SA). To identify the region of the OsNPR1 promoter involved in response to SA, we carried out deletion mutagenesis of the region 1005 bp upstream of the OsNPR1 start codon. Ciselement analysis revealed that the OsNPR1 promoter contains W-boxes and ASF1 motifs, both of which are known to be functional cis-elements of the WRKY and bZIP proteins, respectively. The deletion constructs 1005:LUC and 752:LUC, were induced by up to 4.3- and 3.8-fold, respectively, following SA treatment, suggesting that W-boxes and ASF1 motifs may play an important role in the strong induction of these constructs by SA. Using mutation analysis, we also showed that both the W-box and ASF1 motif are necessary for SA-induced expression of OsNPR1.

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References

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