The potential physiological implications of polygalacturonic acid-mediated production of superoxide.
Journal Article
PGA/OGA/PF represent apoplastic signaling molecules implicated in the control of gene expression and the activity of enzymes involved in defense regulation. However, the underlying mechanisms behind such processes are lacking. Here we unequivocally show using EPR spectroscopy with DEPMPO spin-trap capable of differentiating between •OH and •O(2)(-) that PGA and PF can produce •O(2)(-) by transforming •OH. The potential physiological implications of this unique property are discussed. We propose that PGA/OGA/PF could represent the initiators of redox signaling cascades in stress response, with H(2)O(2) being a downstream secondary messenger.
Full Text
Duke Authors
Cited Authors
- Spasojević, I; Pristov, JB
Published Date
- December 2010
Published In
Volume / Issue
- 5 / 12
Start / End Page
- 1525 - 1529
PubMed ID
- 21139441
Pubmed Central ID
- 21139441
Electronic International Standard Serial Number (EISSN)
- 1559-2324
International Standard Serial Number (ISSN)
- 1559-2316
Digital Object Identifier (DOI)
- 10.4161/psb.5.12.12838
Language
- eng