Biosynthesis of sakuranetin regulated by OsMPK6-OsWRKY67-OsNOMT cascade enhances resistance to false smut disease
文献类型： 外文期刊
作者： Ma, Jinbiao 1 ; Wei, Lirong 1 ; Huang, Keyi 1 ; Wang, Dacheng 1 ; Gao, Jiameng 1 ; Chen, Xi 1 ; Guo, Huimin 1 ; Gao, Shangyu 1 ; Zhang, Min 1 ; Li, Shujing 1 ; Yu, Chenjie 1 ; Zhao, Jing 1 ; Wu, Jingni 1 ; Gu, Qin 1 ; Kim, Sun Tae 2 ; Gupta, Ravi 3 ; Xiong, Guosheng 4 ; Lo, Clive 5 ; Liu, Yongfeng 6 ; Wang, Yiming 1 ;
作者机构： 1.Nanjing Agr Univ, Dept Plant Pathol, Key Lab Integrated Management Crop Dis & Pests, Minist Educ, Nanjing 210095, Peoples R China
2.Pusan Natl Univ, Dept Plant Biosci, Miryang 50463, South Korea
3.Kookmin Univ, Coll Gen Educ, Seoul 02707, South Korea
4.Nanjing Agr Univ, Acad Adv Interdisciplinary Studies, Nanjing 210095, Peoples R China
5.Univ Hong Kong, Sch Biol Sci, Pokfulam 999077, Peoples R China
6.Jiangsu Acad Agr Sci, Inst Plant Protect, Nanjing 210014, Peoples R China
关键词： immune signaling; rice; rice false smut disease; sakuranetin; WRKY transcription factor
期刊名称：NEW PHYTOLOGIST （ 影响因子：8.1； 五年影响因子：10.3 ）
ISSN： 0028-646X
年卷期： 2025 年 245 卷 3 期
页码：
收录情况： SCI
摘要： Rice false smut disease, caused by the fungal pathogen Ustilaginoidea virens, significantly restricts both the production and quality of rice grains. However, the molecular mechanism underlying rice resistance against U. virens remain largely elusive. Transcriptome analysis of rice panicles infected with U. virens revealing the crucial role of genes involved in sakuranetin biosynthesis in conferring resistance to the pathogen. In vitro assays demonstrated that sakuranetin was most effective at inhibiting mycelial growth, spore germination, and host infection by U. virens. The expression of OsNOMT, the key enzyme in sakuranetin biosynthesis, is directly regulated by the transcription factor OsWRKY67. Furthermore, OsMPK6, a mitogen-activated protein kinase, interacts with and phosphorylates OsWRKY67, thereby modulating sakuranetin biosynthesis and resistance to U. virens. Moreover, the exogenous application of synthetic sakuranetin significantly reduces U. virens infection. Our findings reveal that the OsMPK6-OsWRKY67-OsNOMT signaling cascade plays a pivotal role in rice resistance to U. virens by regulating sakuranetin biosynthesis.
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