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- W3043772489 abstract "ABSTRACT Plant long noncoding RNAs (lncRNAs) have emerged as important regulators of chromatin dynamics, impacting on transcriptional programs leading to different developmental outputs. The lncRNA AUXIN REGULATED 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 ribonucleoprotein complex involving APOLO and WRKY42 forms a regulatory hub which activates RHD6 by shaping its epigenetic environment and integrates signals governing RH growth and development. SUMMARY The lncRNA APOLO directly regulates the transcription of the root hair-master gene RHD6 . In response to cold, APOLO is induced and it decoys the H3K27me3-binding protein LHP1 away from RHD6 . In addition, APOLO modulates the binding of the transcription factor WRKY42 to the RHD6 promoter at low temperatures." @default.
- W3043772489 created "2020-07-23" @default.
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- W3043772489 date "2020-07-14" @default.
- W3043772489 modified "2023-10-18" @default.
- W3043772489 title "The lncRNA<i>APOLO</i>interacts with the transcription factor WRKY42 to trigger root hair cell expansion in response to cold" @default.
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- W3043772489 doi "https://doi.org/10.1101/2020.07.13.188763" @default.
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