26.植物に環境ストレス耐性を付与するタンパク質RSOsPR10の発現制御機構の解析(口頭発表)

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RSOsPR10 was originally found as the root specific protein induced by drought and salt treatment in rice. RSOsPR10 protein was induced specifically in roots by abiotic stresses and plant hormones, such as jasmonic acid (JA) and ethylene (ET). The expression of RSOsPR10 protein in the cortex cells in the roots was observed by immunohistochemical method. These results suggest that RSOsPR10 might be involved in a tolerance to abiotic stresses. The transgenic rice and bentgrass plants continuously expressing RSOsPR10 gene were generated and their responses to abiotic stresses were investigated. The transgenic plants exhibited higher tolerance to drought and salt stress than wild type plants. Here, we report about the mechanism for regulation of expression of RSOsPR10 in rice roots. The expression of RSOsPR10 was induced by exogenous JA and ET, and the induction was suppressed by salicylic acid (SA). However, the details of the signaling pathway are still unclear. To reveal involvement of JA in induction of RSOsPR10, we investigated the expression of RSOsPR10 mRNA in JA deficient mutants hebiba, cpm1 and cpm2 (These seeds were provided from Drs. P. Nick (Karlsruhe University), H. Yamane (University of Tokyo), and M. Iino (Osaka City University)). In these mutants, RSOsPR10 was induced by salt and ET treatment. From these results, it is suggested that at least in the induction by salt treatment, non-JA pathway is operating for the RSOsPR10 gene expression.
植物化学調節学会の論文
2008-10-06

26.植物に環境ストレス耐性を付与するタンパク質RSOsPR10の発現制御機構の解析(口頭発表)

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