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Identification and characterization of FpRco1 in regulating vegetative growth and pathogenicity based on T-DNA insertion in Fusarium pseudograminearum

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Journal of Integrative Agriculture 2024年第9期23卷 3055-3065页

作者： Haiyang Li Yuan Zhang Cancan Qin Zhifang Wang Lingjun Hao Panpan Zhang Yongqiang Yuan Chaopu Ding Mengxuan Wang Feifei Zan Jiaxing Meng Xunyu Zhuang Zheran Liu Limin Wang Haifeng Zhou Linlin Chen Min Wang Xiaoping Xing Hongxia Yuan Honglian Li shengli Ding College of Plant Protection Henan Agricultural UniversityZhengzhou 450046China National Key Laboratory of Wheat and Maize Crop science Zhengzhou 450046China Henan Plant Health Protection Technology Engineering Research Center Zhenzhou 450046China

Fusarium pseudograminearum is a devastating pathogen that causes Fusarium crown rot(FCR)in wheat and poses a significant threat to wheat production in terms of grain yield and ***,the mechanism by which *** infects wheat remains *** this study,we aimed to elucidate these mechanisms by constructing a T-DNA insertion mutant library for the highly virulent strain WZ-8A of *** screening this mutant library,we identified nine independent mutants that displayed impaired pathogenesis in barley *** these mutants,one possessed a disruption in the gene FpRCO1 that is an ortholog of saccharomyces cerevisiae RCO1,encoding essential component of the rpd3s histone deacetylase complex in *** further investigate the role of FpRCO1 in ***,we employed a split-marker approach to knock out FpRCO1 in *** ***1 deletion mutants exhibit reduced vegetative growth,conidium production,and virulence in wheat coleoptiles and barley leaves,whereas the complementary strain restores these ***,under stress conditions,the FpRCO1 deletion mutants exhibited increased sensitivity to NaCl,sorbitol,and sDs,but possessed reduced sensitivity to H_(2)O_(2)compared to these characteristics in the wild-type ***-seq analysis revealed that deletion of FpRCO1 affected gene expression(particularly the downregulation of TRI gene expression),thus resulting in significantly reduced deoxynivalenol(DON)*** summary,our findings highlight the pivotal role of FpRCO1 in regulating vegetative growth and development,asexual reproduction,DON production,and pathogenicity of *** study provides valuable insights into the molecular mechanisms underlying *** infection in wheat and may pave the way for the development of novel strategies to combat this devastating disease.

关键词： Fusarium pseudograminearum T-DNA insertion rpd3s complex FpRCO1 pathogenicity DON production

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