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投稿时间:2021-05-19
投稿时间:2021-05-19
中文摘要: 喷雾诱导基因沉默(spray-induced gene silencing,SIGS)基于RNA干扰(RNA interference,RNAi),在体外合成靶标双链RNA(double-stranded RNA,dsRNA)并施用在附着病原菌的果蔬表面,通过dsRNA的跨界转运和对同源信使RNA(message RNA,mRNA)的特异性降解,实现对靶标基因的沉默,在果蔬采后病害防治领域具有很大潜力。但目前dsRNA的体外合成通常采用商业化的试剂盒,价格十分昂贵,阻碍了dsRNA杀菌剂的大规模应用。该文以工程菌-大肠杆菌HT115为宿主,建立能够合成靶向桃采后软腐病菌(匍枝根霉)β-1,3-葡聚糖合成酶dsRNA的合成体系,可实现靶标dsRNA的低成本量产。
Abstract:Spray-induced gene silencing(SIGS)based on RNA interference(RNAi)could be a potential strategy to control disease in fruits and vegetables after harvest.Target double-stranded RNA(dsRNA)was synthesized in vitro and applied to the surface of fruits and vegetables using SIGS.The dsRNA would then undergo transboundary transport,leading to specific degradation of homologous mRNAs and subsequent silencing of the target genes.However,in vitro synthesis of dsRNA usually requires the use of very expensive commercial kits,and this restricts large-scale application of dsRNA fungicides.The engineering bacterium Escherichia coli HT115 was used as a host to synthesize dsRNA that targets β-1,3-glucan synthetase of the soft rot pathogen Rhizopus stolonifer that affects peaches post-harvest.This method would allow the low-cost mass production of targeted dsRNA,thus providing a foundation for the development and application of dsRNA fungicides for postharvest soft rot disease in peaches.
keywords: RNA interference spray-induced gene silencing(SIGS) double-stranded RNA(dsRNA)fungicide dsRNA synthesis Escherichia coli
文章编号:202209025 中图分类号: 文献标志码:
基金项目:江苏省农业科技自主创新资金(CX(19)3113);江苏省自然科学基金青年基金(BK20190265)
作者 | 单位 |
张映曈,赵欢欢,周宏胜,凌军,李鹏霞 | 江苏省农业科学院农业设施与装备研究所,江苏 南京 210095;南京农业大学食品科技学院,江苏 南京 210095;江苏省高效园艺作物遗传改良重点实验室,江苏 南京 210095 |
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