A previously undescribed jasmonate compound in flowering Arabidopsis thaliana - The identification of cis-(+)-OPDA-Ile
Language English Country England, Great Britain Media print-electronic
Document type Journal Article, Research Support, Non-U.S. Gov't
PubMed
26675361
DOI
10.1016/j.phytochem.2015.11.012
PII: S0031-9422(15)30113-8
Knihovny.cz E-resources
- Keywords
- Arabidopsis thaliana (Brassicaceae), Cis-(+)-12-oxo-phytodienoyl-l-isoleucine (cis-(+)-OPDA-Ile), Jasmonates, Solid-phase extraction (SPE), Tandem mass spectrometry (MS/MS), Ultra-high performance liquid chromatography (UHPLC),
- MeSH
- Arabidopsis chemistry MeSH
- Cyclopentanes chemistry isolation & purification MeSH
- Diazonium Compounds MeSH
- Isoleucine analogs & derivatives chemistry MeSH
- Flowers chemistry MeSH
- Plant Leaves metabolism MeSH
- Fatty Acids, Unsaturated chemistry isolation & purification metabolism MeSH
- Oxylipins chemistry isolation & purification MeSH
- Pyridines MeSH
- Plant Growth Regulators metabolism MeSH
- Stereoisomerism MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
- Names of Substances
- 12-oxophytodienoic acid MeSH Browser
- 2-(2'-pyridyldithio)benzyldiazoacetate MeSH Browser
- Cyclopentanes MeSH
- Diazonium Compounds MeSH
- Isoleucine MeSH
- jasmonic acid MeSH Browser
- jasmonoyl-isoleucine MeSH Browser
- Fatty Acids, Unsaturated MeSH
- Oxylipins MeSH
- Pyridines MeSH
- Plant Growth Regulators MeSH
Jasmonates (JAs) are plant hormones that integrate external stress stimuli with physiological responses. (+)-7-iso-JA-L-Ile is the natural JA ligand of COI1, a component of a known JA receptor. The upstream JA biosynthetic precursor cis-(+)-12-oxo-phytodienoic acid (cis-(+)-OPDA) has been reported to act independently of COI1 as an essential signal in several stress-induced and developmental processes. Wound-induced increases in the endogenous levels of JA/JA-Ile are accompanied by two to tenfold increases in the concentration of OPDA, but its means of perception and metabolism are unknown. To screen for putative OPDA metabolites, vegetative tissues of flowering Arabidopsis thaliana were extracted with 25% aqueous methanol (v/v), purified by single-step reversed-phase polymer-based solid-phase extraction, and analyzed by high throughput mass spectrometry. This enabled the detection and quantitation of a low abundant OPDA analog of the biologically active (+)-7-iso-JA-L-Ile in plant tissue samples. Levels of the newly identified compound and the related phytohormones JA, JA-Ile and cis-(+)-OPDA were monitored in wounded leaves of flowering Arabidopsis lines (Col-0 and Ws) and compared to the levels observed in Arabidopsis mutants deficient in the biosynthesis of JA (dde2-2, opr3) and JA-Ile (jar1). The observed cis-(+)-OPDA-Ile levels varied widely, raising questions concerning its role in Arabidopsis stress responses.
References provided by Crossref.org
OPDA-Ile - a new JA-Ile-independent signal?
