title: The DELLA protein RGL3 positively contributes to jasmonate/ethylene defense responses.
abstract: Gibberellins (GA) are phytohormones controlling major aspects of plant lifecycle including seed germination, growth and flower development. GA signaling is also involved in resistance to adverse conditions, thus providing a mechanism for environmentally responsive growth regulation. We recently characterized the function of a core component of the GA signal transduction pathway: RGL3. RGL3 belongs to the DELLA family of negative GA response regulators. Jasmonate (JA) rapidly induces RGL3 expression, which in turn enhances the expression of JA-responsive genes by inhibiting the activity of key repressors of JA signaling, the JAZ proteins. JA and ethylene (ET) are well known to play synergistic roles in plant disease resistance. Accordingly, we showed that RGL3 regulates plant defense responses by modulating JA/ET-mediated defense signaling pathway.
authors: Institut de Biologie Moléculaire des Plantes; UPR2357; Conventionné avec l'Université de Strasbourg; Strasbourg, France.
authors: Michael
authors: M
authors: Wild
authors: Patrick
authors: P
authors: Achard
mesh_terms: D017360:Arabidopsis / Q000235:genetics* / Q000378:metabolism / Q000502:physiology; D029681:Arabidopsis Proteins / Q000235:genetics* / Q000378:metabolism; D003517:Cyclopentanes / Q000378:metabolism*; D060467:Disease Resistance / Q000235:genetics*; D005030:Ethylenes / Q000378:metabolism*; D018506:Gene Expression Regulation, Plant; D017343:Genes, Plant; D005875:Gibberellins / Q000378:metabolism*; D054883:Oxylipins / Q000378:metabolism*; D010935:Plant Diseases / Q000235:genetics; D010937:Plant Growth Regulators / Q000378:metabolism; D012097:Repressor Proteins / Q000235:genetics / Q000378:metabolism; D015398:Signal Transduction
chemical_list: D029681:Arabidopsis Proteins; D003517:Cyclopentanes; D005030:Ethylenes; C109555:GAI protein, Arabidopsis; D005875:Gibberellins; C554741:JAZ1 protein, Arabidopsis; D054883:Oxylipins; D010937:Plant Growth Regulators; C485889:RGL3 protein, Arabidopsis; D012097:Repressor Proteins; C011006:jasmonic acid; C036216:ethylene
keywords: RGL3; ethylene; gibberellin; jasmonate; plant defense