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冬小麦miR398前体的克隆及其在低温条件下对靶基因CSD1表达的调控

Journal of Triticeae Crops(2016)

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Abstract
miR398是受逆境胁迫负调控的miRNA,其靶基因CSD编码超氧化物歧化酶(SOD),使植物抵御活性氧(ROS)的毒害.为进一步了解低温胁迫下miR398的调控机制,从东农冬麦1号中克隆小麦miR398前体,构建过表达载体并转化拟南芥,用Real-time PCR检测T0代植株中小麦miR398及其靶基因CSD1在低温胁迫下的表达量.结果表明,随着低温胁迫时间的延长,miR398表达下调、CSD1基因表达上调,认为小麦miR398能响应低温胁迫、负调控CSD1基因表达,间接提高了拟南芥的抗寒性.
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