cell-communication
Cell communication, or cell signaling, is the process by which plant cells send, receive, and interpret molecular messages to coordinate biological activity within and between cells. In plants, these signaling networks govern critical processes such as growth, development, stress responses, and defense against pathogens. Understanding how plant cells communicate enables researchers to uncover the mechanisms behind adaptation to environmental challenges and opens pathways for improving crop resilience and productivity.
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.