Mechanically induced localisation of SECONDARY WALL INTERACTING bZIP is associated with thigmomorphogenic and secondary cell wall gene expression

• DOI: 10.1017/qpb.2024.5
• Publication Date: 2024-05-03T08:16:16Z
• Authors: Joshua H. Coomey; Kirk J.-M. MacKinnon; Ian W. McCahill; Bahman Khahani; Pubudu P. Handaku...; Gina M. Trabucco; Jessica Mazzola; Nicole A. Leblanc; Rithany Kheam; Miriam Hernandez-...; Kerrie Barry; Lifeng Liu; Ji E. Lee; John P. Vogel; Ronan C. O’Malley; James J. Chambers; Samuel P. Hazen
• Keywords: Brachypodium distachyon; bZIP domain

Abstract Plant growth requires the integration of internal and external cues, perceived transduced into a developmental programme cell division, elongation wall thickening. Mechanical forces contribute to this regulation, thigmomorphogenesis typically includes reducing stem height, increasing diameter, canonical transcriptomic response. We present data on bZIP transcription factor involved in process grasses. Brachypodium distachyon SECONDARY WALL INTERACTING (SWIZ) protein translocated nucleus following mechanostimulation. Classical touch-responsive genes were upregulated B. roots touch, including significant induction glycoside hydrolase 17 family, which may be unique grass thigmomorphogenesis. SWIZ binding an E-box variant exons introns was associated with immediate activation followed by repression gene expression. overexpression resulted plants reduced root elongation. These further define plant transcriptomics physiology, offering insights mechanotranduction dynamics.