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A Wheat Allene Oxide Cyclase Gene Enhances Salinity Tolerance via Jasmonate Signaling
- Source :
- Plant Physiology. 164:1068-1076
- Publication Year :
- 2013
- Publisher :
- Oxford University Press (OUP), 2013.
-
Abstract
- One of the two branches of the α-linolenic acid metabolism pathway is catalyzed by 12-oxo-phytodienoic acid reductase I, and the other is involved in jasmonic acid (JA) synthesis. The former is known to be active in the response to salinity tolerance in wheat (Triticum aestivum), but the participation of the latter in this response has not been established as yet. Here, the salinity-responsive bread wheat gene TaAOC1, which encodes an allene oxide cyclase involved in the α-linolenic acid metabolism pathway, was constitutively expressed in both bread wheat and Arabidopsis (Arabidopsis thaliana). In both species, transgenic lines exhibited an enhanced level of tolerance to salinity. The transgenic plants accumulated a higher content of JA and developed shorter roots. Both the shortened roots and the salinity tolerance were abolished in a background lacking a functional AtMYC2, a key component of the JA and abscisic acid signaling pathway, but were still expressed in a background deficient with respect to abscisic acid synthesis. We provide the first evidence, to our knowledge, suggesting that JA is also involved in the plant salinity response and that the α-linolenic acid metabolism pathway has a regulatory role over this response.
- Subjects :
- Osmosis
Physiology
Molecular Sequence Data
Arabidopsis
Cyclopentanes
Plant Science
Genetically modified crops
Genes, Plant
Models, Biological
Article
chemistry.chemical_compound
Plant Growth Regulators
Gene Expression Regulation, Plant
Stress, Physiological
Genetics
Arabidopsis thaliana
Oxylipins
Abscisic acid
Phylogeny
Triticum
Plant Proteins
biology
Arabidopsis Proteins
Jasmonic acid
Allene-oxide cyclase
food and beverages
Hydrogen Peroxide
Salt Tolerance
Plants, Genetically Modified
biology.organism_classification
Adaptation, Physiological
Up-Regulation
Intramolecular Oxidoreductases
Plant Leaves
Salinity
Phenotype
chemistry
Biochemistry
Seedlings
Signal transduction
Signal Transduction
Subjects
Details
- ISSN :
- 15322548
- Volume :
- 164
- Database :
- OpenAIRE
- Journal :
- Plant Physiology
- Accession number :
- edsair.doi.dedup.....dc67772c31585ca72f31d2f5a368df7f