The IncRNA APOLO interacts with the transcription factor WRKY42 to trigger root hair cell expansion in response to cold

• 作者: Micha?l Moison Javier Martínez Pacheco Leandro Lucero Camille Fonouni-Farde Johan Rodríguez-Melo Natanael Mansilla Aurélie Christ Jérémie Bazin Moussa Benhamed Fernando Iba?ez Martin Crespi José M.Estevez Federico Ariel
• 来源期刊: 分子植物（英文版）
• 年，卷（期）: 2021,（6）
• 所属期刊栏目: Research Articles
• 页码范围: 937-948
• 页数: 12页
• 语种: 英文

摘要

Plant long noncoding RNAs(IncRNAs)have emerged as important regulators of chromatin dynamics,im-pacting on transcriptional programs leading to different developmental outputs.The IncRNAAUXIN-REGU-LATED PROMOTER LOOP(APOLO)directly recognizes multiple independent loci across the Arabidopsis genome and modulates their three-dimensional chromatin conformation,leading to transcriptional shifts.Here,we show that APOLO recognizes the locus encoding the root hair(RH)master regulator ROOT HAIR DEFECTIVE 6(RHD6)and controls RHD6 transcriptional activity,leading to cold-enhanced RH elongation through the consequent activation of the transcription factor gene RHD6-like RSL4.Furthermore,we demonstrate that APOLO interacts with the transcription factor WRKY42 and modulates its binding to the RHD6 promoter.WRKY42 is required for the activation of RHD6 by low temperatures and WRKY42 deregulation impairs cold-induced RH expansion.Collectively,our results indicate that a novel ribonucleo-protein complex with APOLO and WRKY42 forms a regulatory hub to activate RHD6 by shaping its epige-netic environment and integrate signals governing RH growth and development.