Developmental roles of LSD1/KDM1A-like (LDL) proteins in plants

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ID: 327823
2026
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Abstract
Abstract LYSINE-SPECIFIC DEMETHYLASE 1-like (LDL) proteins are conserved FAD-dependent amine oxidases that serve as pivotal regulators in plants. While animal systems typically rely on a single LSD1/KDM1A enzyme, the Arabidopsis thaliana genome encodes an expanded family of LDL homologues (FLD, LDL1, LDL2, and LDL3), resulting in substantial subfunctionalization and specialized recruitment mechanisms. This review explores the diverse developmental roles of plant LDLs, ranging from flowering time and circadian clock regulation to heterochromatin maintenance and epigenetic regulation. We discuss the redundant roles of FLD, LDL1, and LDL2 in repressing the floral repressor FLC and their nonredundant specialized function within the CCA1/LHY-TOC1 circadian feedback loop. A central focus of our review is the emerging mechanism of transcription-coupled demethylation, in which LDLs associate with the phosphorylated C-terminal domain of RNA polymerase II to modify chromatin cotranscriptionally within gene bodies. By integrating findings from Arabidopsis thaliana and crops such as tomato and soybean, we illustrate how the diversified LDL-mediated regulatory toolkit facilitates precise, gene-specific regulation. Ultimately, the LDL family represents a cornerstone of the sophisticated epigenetic strategies that regulate plant phenotypic plasticity in response to developmental and environmental cues.
Reference Key
openalex_W7211973762 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Riyazuddin Riyazuddin, Eduardo Larriba, Carlos Torralbo-Torrado, José Manuel Pérez‐Pérez
Journal Journal of experimental botany
Year 2026
DOI
10.1093/jxb/erag451
URL
https://doi.org/10.1093/jxb/erag451
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