Gibberellin-mediated PtrLBD39-PtrHDA6-PtrHCT epigenetic path regulates lignin biosynthesis during tension wood formation in Populus trichocarpa.
Tension wood (TW) is a specialized xylem tissue formed in angiosperm trees to counteract mechanical stresses. Increased phytohormones, particularly gibberellins (GAs), and decreased lignin deposition are two well-established features of TW, yet the molecular mechanisms linking GA signaling to lignin repression remain l...