摘要：SummaryInflorescence architecture is diverse in flowering plants, and two determinants of inflorescence architecture are the inflorescence meristem and pedicel length. Although the ERECTA (ER) signaling pathway, in coordination with the SWR1 chromatin remodeling complex, regulates inflorescence architecture with subsequent effects on pedicel elongation, the mechanism underlyingSWR1-ERsignaling pathway regulation of inflorescence architecture remains unclear. This study determined that SDG2 genetically interacts with theSWR1-ERsignaling pathways in regulating inflorescence architecture. Transcriptome results showed that auxin might potentially influence inflorescence growth mediated by SDG2 andSWR1-ERpathways. SWR1 and ER signaling are required to enrich H2A.Z histone variant and SDG2 regulated SDG2-mediated H3K4me3 histone modification at auxin-related genes and H2A.Z histone variant enrichment. Our study shows how the regulation of inflorescence architecture is mediated by SDG2 and SWR1-ER, which affects auxin hormone signaling pathways.Graphical abstractDisplay OmittedHighlights•SDG2 genetically interacts with the SWR1-ERECTA pathway in inflorescence development•SWR1-ERECTA pathway is required to enrich H2A.Z and H3K4me3 at auxin-related genes•H2A.Z histone variant enrichment was regulated by SDG2Molecular biology; Plant Biology; Plant morphology; Transcriptomics
