Journal
FRONTIERS IN PLANT SCIENCE
Volume 4, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fpls.2013.00049
Keywords
oligogalacturonides; damage-associated molecular patterns; innate immunity; pectin; elicitors; signal transduction; defense responses; cell wall
Categories
Funding
- ERC [ERC AdG 233083]
- Ministero dell'Istruzione, dell'Universita a della Ricerca [PRIN2009WTCL8, FIRB ERA-PG RBER063SN4]
- Istituto Pasteur - Fondazione Cenci-Bolognetti
- Sapienza Universita di Roma (Richerche Universitarie) [C26A10ME4X]
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Oligogalacturonides (OGs) are oligomers of alpha-1,4-linked galacturonosyl residues released from plant cell walls upon partial degradation of homogalacturonan. OGs are able to elicit defense responses, including accumulation of reactive oxygen species and pathogenesis-related proteins, and protect plants against pathogen infections. Recent studies demonstrated that OGs are perceived by wall-associated kinases and share signaling components with microbe-associated molecular patterns. For this reason OGs are now considered true damage-associated molecular patterns that activate the plant innate immunity and may also be involved in the activation of responses to mechanical wounding. Furthermore, OGs appear to modulate developmental processes, likely through their ability to antagonize auxin responses. Here we review our current knowledge on the role and mode of action of this class of oligosaccharides in plant defense and development.
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