intercellular-transport
Intercellular transport refers to the movement of molecules, signals, and nutrients between plant cells through specialized channels such as plasmodesmata and the vascular system. This process is fundamental to plant development and physiology, coordinating growth, distributing photosynthate, and enabling systemic signaling responses to environmental stimuli. Understanding how plants regulate intercellular transport helps researchers unravel how resources and information are allocated across tissues, with implications for improving crop yield and stress resilience.
open_in_new WikipediaPubMed · 2026-04-15
Plants use tiny cellular tunnels called plasmodesmata to pass signals between cells, and scientists have uncovered that a single molecule — callose — acts as a universal gatekeeper, but the biological outcomes of closing these tunnels vary widely depending on what triggered the shutdown.
Callose accumulation and degradation is the primary mechanism controlling the openness of plasmodesmata, the channels connecting plant cells.
The same callose-based closure can produce different biological outcomes depending on which signaling pathway triggered it, revealing signal-specific regulation.
How regulatory protein complexes assemble and achieve signal specificity is identified as a major open frontier in plant biology.