The plant cell wall matrix harbors a precursor of defense signaling peptides
- 26 August 2005
- journal article
- Published by National Academy of Sciences in Proceedings of the National Academy of Sciences
- Vol. 102 (36) , 12974-12977
Abstract
Proteins of plant cell walls serve as structural macromolecules and play important roles in morphogenesis and development but have not been reported to be the origins of peptide signals that activate genes for plant defense. We report here that the mRNA coding the tomato leaf polyprotein precursor of three hydroxyproline-rich glycopeptide defense signals (called Le HypSys I, II, and III) is synthesized in phloem parenchyma cells in response to wounding, systemin, and methyl jasmonate, and the nascent protein is sequestered in the cell wall matrix. These findings indicate that the plant cell wall can play an active role in defense as a source of peptide signals for systemic wound signaling.Keywords
This publication has 19 references indexed in Scilit:
- Systemic signaling in the wound responseCurrent Opinion in Plant Biology, 2005
- Overexpression of a novel small peptide ROTUNDIFOLIA4 decreases cell proliferation and alters leaf shape in Arabidopsis thalianaThe Plant Journal, 2004
- Ligand-receptor pairs in plant peptide signalingJournal of Cell Science, 2003
- Systemic Signaling in Tomato Plants for Defense against HerbivoresJournal of Biological Chemistry, 2003
- Enzymes of Jasmonate Biosynthesis Occur in Tomato Sieve ElementsPlant and Cell Physiology, 2003
- A Novel Family in Medicago truncatula Consisting of More Than 300 Nodule-Specific Genes Coding for Small, Secreted Polypeptides with Conserved Cysteine Motifs,Plant Physiology, 2003
- Production of multiple plant hormones from a single polyprotein precursorNature, 2001
- Modulation of Plasma Membrane H+-ATPase Activity Differentially Activates Wound and Pathogen Defense Responses in Tomato PlantsThe Plant Cell, 1999
- Extensin: repetitive motifs, functional sites, post‐translational codes, and phylogenyThe Plant Journal, 1994
- Structure, Expression, and Antisense Inhibition of the Systemin Precursor GeneScience, 1992