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The RALF1-FERONIA Complex Phosphorylates eIF4E1 to Promote Protein Synthesis and Polar Root Hair Growth

Molecular Plant 2020年第5期13卷 698-716页

作者： Sirui Zhu Jose Manuel Estevez Hongdong Liao Yonghua Zhu Tao Yang Chiyu Li Yichuan Wang Lan Li Xuanming Liu Javier Martinez Pacheco Hongwei Guo Feng Yu State Key Laboratory of Chemo/Biosensing and Chemometrics College of Biologyand Hunan Key Laboratory of Plant Functional Genomics and Developmental RegulationHunan UniversityChangsha 410082P.R.China Fundacion Instituto Leloir Buenos Aires C1405BWEArgentina and IIBBA-CONICETBuenos Aires C1405BWEArgentina Centro de Biotecnologfa Vegetal Facultad de Ciencias de la VidaUniversidad Andres BelloSantiago RM 8370146Chile National Engineering Laboratory for Rice and Byproduct Deep Processing Central South University of Forestry and TechnologyChangsha 410004P.R.China Institute of Plant and Food Science Department of BiologySouthern University of Science and TechnologyShenzhenGuangdong 518055P.R.China State Key Laboratory of Hybrid Rice Hunan Hybrid Rice Research CenterChangsha 410125P.R.China

The molecular links between extracellular signals and the regulation of localized protein synthesis in plant cells are poorly ***,we show that in Arabidopsis thaliana,the extracellular peptide RALF1 and its receptor,the FERONIA receptor kinase,promote root hair(RH)tip growth by modulating protein *** found that RALF1 promotes FERONIA-mediated phosphorylation of elF4E1,a eukaryotic translation initiation factor that plays a crucial role in the control of mRNA translation *** elF4E1 increases mRNA affinity and modulates mRNA translation and,thus,protein *** mRNAs targeted by the RALF1-FERONIA-elF4E1 module include ROP2 and rsl4,which are important regulators of RH cell polarity and ***1 and FERONIA are expressed in a polar manner in RHs,which facilitate elF4E1 polar丨ocalization and thus may control local f?OP2 ***,we demonstrated that high-level accumulation of rsl4 exerts negative-feedback regulation of RALF1 expression by directly binding the RALF1 gene promoter,determining the final RH *** study reveals that the link between RALF1-FERONIA signaling and protein synthesis constitutes a novel component regulating cell expansion in these polar growing cells.

关键词： elF4E1 FER polar cell growth RALF1 root hairs rsl4

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