文献类型： 外文期刊

作者： Wang, Bingqian ¹ ; Luo, Cailin ¹ ; Li, Xiaoxu ² ; Jimenez, Alvaro ³ ; Cai, Jun ¹ ; Chen, Jia ¹ ; Li, Changsheng ¹ ; Zhang, Chunhui ¹ ; Ou, Lijun ⁵ ; Pu, Wenxuan ² ; Peng, Yu ² ; Zhang, Zhenchen ⁶ ; Cai, Yong ¹ ; Valls, Marc ³ ; Wu, Dousheng ¹ ; Yu, Feng ¹ ;

作者机构： 1.Hunan Univ, Coll Biol, State Key Lab Chemo Biosensing & Chemometr, Hunan Key Lab Plant Funct Genom & Dev Regulat, Changsha 410082, Peoples R China

2.China Tobacco Hunan Ind Co Ltd, Technol Ctr, Changsha 410014, Peoples R China

3.Univ Barcelona, Dept Genet, E-08007 Barcelona, Spain

4.UAB, CSIC, IRTA, UB,Ctr Res Agr Genom, Edifici CRAG,Campus UAB, Bellaterra 08193, Catalonia, Spain

5.Hunan Agr Univ, Engn Res Ctr Educ, Key Lab Vegetable Biol Hunan Prov, Engn Res Ctr Educ,Minist Germplasm Innovat Breedin, Changsha 410125, Peoples R China

6.Guangdong Acad Agr Sci GAAS, Crops Res Inst, Guangdong Key Lab Crops Genet & Improvement, Guangzhou 510640, Peoples R China

7.Yuelushan Lab, Changsha 410128, Peoples R China

期刊名称：PLANT CELL （ 影响因子：11.6； 五年影响因子：12.1 ）

ISSN： 1040-4651

年卷期： 2024 年 37 卷 1 期

页码：

收录情况： SCI

摘要： Some pathogens colonize plant leaves, but others invade the roots, including the vasculature, causing severe disease symptoms. Plant innate immunity has been extensively studied in leaf pathosystems; however, the precise regulation of immunity against vascular pathogens remains largely unexplored. We previously demonstrated that loss of function of the receptor kinase FERONIA (FER) increases plant resistance to the typical vascular bacterial pathogen Ralstonia solanacearum. Here, we show that upon infection with R. solanacearum, root xylem cell walls in Arabidopsis thaliana become highly lignified. FER is specifically upregulated in the root xylem in response to R. solanacearum infection, and inhibits lignin biosynthesis and resistance to this pathogen. We determined that FER interacts with and phosphorylates the transcription factor RESPONSIVE TO DESICCATION 26 (RD26), leading to its degradation. Overexpression and knockout of RD26 demonstrated that it positively regulates plant resistance to R. solanacearum by directly activating the expression of lignin-related genes. Tissue-specific expression of RD26 in the root xylem confirmed its role in vascular immunity. We confirmed that the FER-RD26 module regulates lignin biosynthesis and resistance against R. solanacearum in tomato ( Solanum lycopersicum). Taken together, our findings unveil that the FER-RD26 cascade governs plant immunity against R. solanacearum in vascular tissues by regulating lignin deposition. This cascade may represent a key defense mechanism against vascular pathogens in plants.