88. イネの根におけるRSOs-PR10遺伝子発現のサリチル酸による抑制機構の解析(口頭発表,植物化学調節学会第46回大会)

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RSOsPR10 was strongly induced at the transcriptional level by JA and ET, while SA almost completely suppressed these inductions in rice roots. In Arabidopsis, several regulatory proteins have been investigated in the transcriptional regulation of defense response genes under the control of the SA signaling pathway. Arabidopsis NPR1 has been studied as one of the important regulators in SA pathway and WRKYs are also known to involve in the pathway. The antagonistic regulation by JA/ET and SA signaling on the expression of PR proteins are well studied. However, in rice, there has been no report about such regulation of PR genes, except RSOsPR10 (Takeuchi et al., PCP, 2011). Here, we focused on the suppression of RSOsPR10 expression by SA treatment in rice roots. We investigated mRNA levels of RSOsPR10, comparing to SA inducible other PR genes, such as PR1a, before and after treatment of JA and SA. We also determined the expression levels of OsNPR1, WRKY45 and the other some stress responsible factors. Expression of RSOsPR10 was up-regulated by JA and repressed by SA, while PRJa expression was increased by both SA and JA. OsNPR1 expression was increased by JA but not SA treatment. In contrast, WRKY45 was up-regulated by SA but not JA treatment. To uncover the molecular mechanism(s) for JA/SA antagonistic regulation of RSOsPR10 expression, we are planning to analyze these gene expressions using over-expression and knockdown lines of OsNPR1 and WRKY45.
植物化学調節学会の論文
2011-10-03

88. イネの根におけるRSOs-PR10遺伝子発現のサリチル酸による抑制機構の解析(口頭発表,植物化学調節学会第46回大会)

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