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Research article2020Peer reviewedOpen access

The RALF1-FERONIA interaction modulates endocytosis to mediate control of root growth in Arabidopsis

Yu, Meng; Li, Ruili; Cui, Yaning; Chen, Weijun; Li, Bin; Zhang, Xi; Bu, Yufen; Cao, Yangyang; Xing, Jingjing; Jewaria, Pawan Kumar; Li, Xiaojuan; Bhalerao, Rishikesh P.; Yu, Feng; Lin, Jinxing

Abstract

The interaction between the receptor-like kinase (RLK) FERONIA (FER) and the secreted peptide RAPID ALKALINIZATION FACTOR1 (RALF1) is vital for development and stress responses in Arabidopsis. Ligand-induced membrane dynamics affect the function of several RLKs, but the effects of the RALF1-FER interaction on the dynamics of FER and the ensuing effects on its functionality are poorly understood. Here, we show that RALF1 modulated the dynamics and partitioning of FER-GFP at the plasma membrane (PM). Moreover, FER was internalized by both clathrin-mediated endocytosis (CME) and clathrin-independent endocytosis (CIE) under steady-state conditions. After RALF1 treatment, FERGFP internalization was primarily enhanced via the CME pathway, raising FER-GFP levels in the vacuole. RALF1 treatment also modulated trafficking of other PM proteins, such as PIN2-GFP and BRI1-GFP, increasing their vacuolar levels by enhancing their internalization. Importantly, blocking CME attenuated RALF1-mediated root growth inhibition independently of RALF1-induced early signaling, suggesting that the RALF1 can also exert its effects via the CME pathway. These findings reveal that the RALF1-FER interaction modulates plant growth and development, and this might also involve endocytosis of PM proteins.

Keywords

RALF1; FERONIA; Endocytosis; Root growth; Arabidopsis

Published in

Development
2020, Volume: 147, number: 13, article number: dev189902
Publisher: COMPANY BIOLOGISTS LTD