水稻OsCIPK10基因的克隆和功能分析

Identification and characterization of rice OsCIPK10 gene

利用反向遗传学的方法对水稻OsCIPK10基因的功能进行了分析。结果表明,过量表达OsCIPK10基因的转基因水稻与野生型水稻在株型、抗高盐和耐低钾能力方面没有明显差异,但是小RNA干扰表达OsCIPK10基因的转基因水稻表现出显著的抗盐性。在缺钾胁迫条件下OsCIPK10基因的表达升高,推测该基因在应答高盐和低钾的非生物胁迫过程中起作用。OsCIPK10基因启动子与报告基因GUS融合表达的转基因水稻的染色结果显示:OsCIPK10基因呈组成型表达,但是在维管组织表达水平更高。

The preliminary role of calcineurin B-like protein-interacting protein kinases （CIPKs） in stress response is defined but the exact function of OsCIPKIO gene in rice stress response and its expression pattern yet unclear. In this study we explored the possible functions of OsCIPKIO gene by reverse genetics approaches and also revealed its expression pattern by GUS staining. From the preliminary study of this gene we presumed its function to assist plant to resist stress but over-expressed OsCIPKIO rice transgenic lines showed no significant phenotypic differences from the wild type either under high salt or low potassium conditions, however the gene knockdown plants using inverted repeat strategy presented meaningful healthy plants compared to wild type under the stress of salt. Further we checked the expression profile under high salt and low potassium conditions in wild type and found that OsCIPKIO decreases under high salt and increases on low potassium conditions. So we speculate that OsCIPKIO is actually going to function in response to high salt and low potassium stress. We also explored the expression pattern of this gene using Gus staining and found that gene expresses in all plant tissues, the only exception observed was its higher expression in the vascular tissues.