Thermospermine signaling in vascular development and stress adaptation: from translational regulation to climate-resilient crops.

Thermospermine (tSpm) acts as a bifunctional translational modulator in vascular development and stress responses in plants, influencing xylem differentiation and abiotic stress adaptation.

• Why it matters: Understanding tSpm's regulatory role addresses gaps in knowledge about post-transcriptional control of vascular development and plant resilience to environmental stresses, which are vital for crop improvement.
• What they did: The study reviews how tSpm promotes translation of SAC51-family bHLH transcription factors by binding to ribosomes at a methylation-dependent site, and how it regulates secondary growth, root patterning, and stress responses across plant species.
• The result: Findings suggest tSpm's conserved biosynthesis and evolving regulatory circuit underpin key developmental and adaptive processes, offering insights for engineering climate-resilient crops.