Mobile protein signals in plant development

Cell-to-cell signaling is essential for normal development and physiology. In both plants and animals, cells secrete proteins or peptides that influence the behavior or fate of neighboring cells. However in plants, signaling is also possible through direct transport of transcription factors between cells. Here we discuss some of the signaling pathways mediated by mobile transcription factors and their implications for plant growth and development.

► Mobile transcription factors control many key aspects of plant development.
► ROS and callose regulate protein movement.
► A role for the endomembrane in cell-to-cell trafficking.