Related Experiment Video
Updated: Apr 2, 2026

Imaging Spatial Reorganization of a MAPK Signaling Pathway Using the Tobacco Transient Expression System
Published on: March 20, 2016
A brief history of the TDIF-PXY signalling module: balancing meristem identity and differentiation during vascular
J Peter Etchells1,2, Margot E Smit1,3, Allison Gaudinier1
1Plant Biology and Genome Center, University of California Davis, 1 Shields Avenue, Davis, CA, 95616, USA.
Abstract:
474 I. 474 II. 475 III. 475 IV. 477 V. 477 VI. 477 VII. 479 VIII. 481 482 References 482 SUMMARY: A significant proportion of terrestrial biomass is constituted of xylem cells that make up woody plant tissue. Xylem is required for water transport, and is present in the vascular tissue with a second conductive tissue, phloem, required primarily for nutrient transport. Both xylem and phloem are derived from cell divisions in vascular meristems known as the cambium and procambium. One major component that influences several aspects of plant vascular development, including cell division in the vascular meristem, vascular organization and differentiation of vascular cell types, is a signalling module characterized by a peptide ligand called TRACHEARY ELEMENT DIFFERENTIATION INHIBITORY FACTOR (TDIF) and its cognate receptor, PHLOEM INTERCALATED WITH XYLEM (PXY). In this review, we explore the literature that describes signalling components, phytohormones and transcription factors that interact with these two central factors, to control the varying outputs required in vascular tissues for normal organization and elaboration of plant vascular tissue.
Related Concept Videos
Cell Signaling in Plants
Primary and Secondary Growth in Roots and Shoots
Meristems and Plant Growth
Xylem and Transpiration-driven Transport of Resources
Morphogenesis
Cells Coordinate Growth and Proliferation

