Host-Induced Gene Silencing of MoAP1 Confers Broad-Spectrum Resistance to Magnaporthe oryzae
文献类型： 外文期刊
作者： Guo, Xiao-Yi 1 ; Li, Yan 2 ; Fan, Jing 2 ; Xiong, Hong 1 ; Xu, Fu-Xian 1 ; Shi, Jun 3 ; Shi, Yi 2 ; Zhao, Ji-Qun 2 ; Wang, Y 1 ;
作者机构： 1.Minist Agr, Sichuan Acad Agr Sci, Rice & Sorghum Res Inst, Key Lab Southwest Rice Biol & Genet Breeding, Deyang, Peoples R China
2.Sichuan Agr Univ, Rice Res Inst, Chengdu, Sichuan, Peoples R China
3.Mianyang Acad Agr Sci, Mianyang, Peoples R China
关键词： host-induced gene silencing; rice blast; small interfering RNA; MoAP1; resistance
期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：5.753； 五年影响因子：6.612 ）
ISSN： 1664-462X
年卷期： 2019 年 10 卷
页码：
收录情况： SCI
摘要： Rice blast caused by Magnaporthe oryzae (M. oryzae) is a major threat to global rice production. In recent years, small interference RNAs (siRNAs) and host-induced gene silencing (HIGS) has been shown to be new strategies for the development of transgenic plants to control fungal diseases and proved a useful tool to study gene function in pathogens. We here tested whether in vitro feeding artificial siRNAs (asiRNAs) could compromise M. oryzae virulence and in vivo HIGS technique could improve rice blast resistance. Our data revealed that silencing of M. oryzae MoAP1 by feeding asiRNAs targeting MoAP1 (i.e., asiR1245, asiR1362, and asiR1115) resulted in inhibited fungal growth, abnormal spores, and decreased pathogenicity. Among the asiRNAs, asiR1115 was the most inhibitory toward the rice blast fungus. Conversely, the asiRNAs targeting three other genes (i.e., MoSSADH, MoACT, and MoSOM1) had no effect on fungal growth. Transgenic rice plants expressing RNA hairpins targeting MoAP1 exhibited improved resistance to 11 tested M. oryzae strains. Confocal microscopy also revealed profoundly restricted appressoria and mycelia in rice blast-infected transgenic rice plants. Our results demonstrate that in vitro asiRNA and in vivo HIGS were useful protection approaches that may be valuable to enhance rice blast resistance.
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