ARABIDOPSIS HOMOLOG OF TRITHORAX1 impacts lateral root development by epigenetic regulation of targets involved in root system architecture.

ABSTRACT: Developmental processes are regulated at multiple levels, including the epigenetic level. Among the epigenetic factors, histone H3 lysine 4 (H3K4) methyltransferases contribute to active transcription of target genes, and here, we explored how the H3K4 methyltransferase ARABIDOPSIS HOMOLOG OF TRITHORAX1 (ATX1) affects Arabidopsis thaliana lateral root (LR) primordium (LRP) morphogenesis. We examined LR development in a loss-of-function null mutant (atx1-1) and a mutant affected in the ATX1 catalytic domain (atx1setm) through bright-field and long-term time-lapse confocal microscopy, transcriptomics, and chromatin immunoprecipitation. LRP morphogenesis in both mutants was severely abnormal, resulting from altered principal growth directions, and was accompanied by extended cell cycle durati

SUBMITTER: Napsucialy-Mendivil S 

PROVIDER: S-EPMC12329177 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature