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利用人工控制细胞死亡策略培育抗稻瘟病水稻

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摘要 利用细菌编码RNase的barnase基因及其特异抑制剂编码基因barstar构成的双元组分系统,把本实验室构建的具有稻瘟菌(Magnarorth rrisea)诱导活性的嵌合启动子与 barnase基因融合,再与由CaMV 355启动子驱动的barstar的构件融合,构建植物表达载体pWBNBS和pPBNBS,转化水稻,并对转基因水稻进行了抗稻瘟病和白叶枯病的检测.结果表明,接种稻瘟菌后,转基因水稻植株中barnase基因受诱导表达;在稻瘟菌侵染诱导下,barnase的表达超过barstar的抑制,导致转基因水稻叶片出现类似过敏感应,表现出对稻瘟病的抗性;转基因水稻对白叶枯病表现出一定的抗性.这些结果说明,通过该双元组分系统策略获得的转基因水稻具有明显的抗致病性真菌和一定程度的抗细菌危害的较广谱抗性。
出处 《科学通报》 EI CAS CSCD 北大核心 2003年第11期1169-1175,共7页 Chinese Science Bulletin
基金 国家高技术研究发展计划资助项目(批准号:2001 AA222261).
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