title: Free radical-mediated systemic immunity in plants.
abstract: Systemic acquired resistance (SAR) is a form of defense that protects plants against a broad-spectrum of secondary infections by related or unrelated pathogens. SAR related research has witnessed considerable progress in recent years and a number of chemical signals and proteins contributing to SAR have been identified. All of these diverse constituents share their requirement for the phytohormone salicylic acid, an essential downstream component of the SAR pathway. However, recent work demonstrating the essential parallel functioning of nitric oxide (NO)-derived and reactive oxygen species (ROS)-derived signaling together with SA provides important new insights in the overlapping pathways leading to SAR. This review discusses the potential significance of branched pathways and the relative contributions of NO/ROS-derived and SA-derived pathways in SAR.
authors.affiliation: Université de Bourgogne, UMR 1347 Agroécologie, Pôle Mécanisme et Gestion des Interactions Plantes-microorganismes, ERL CNRS 6300, Dijon, France.
authors.forename: David
authors.initials: D
authors.lastname: Wendehenne
authors.affiliation: Department of Plant Pathology, University of Kentucky, Lexington, KY 40546, United States.
authors.forename: Qing-Ming
authors.initials: QM
authors.lastname: Gao
authors.affiliation: Department of Plant Pathology, University of Kentucky, Lexington, KY 40546, United States.
authors.forename: Aardra
authors.initials: A
authors.lastname: Kachroo
authors.affiliation: Department of Plant Pathology, University of Kentucky, Lexington, KY 40546, United States. Electronic address: pk62@uky.edu.
authors.forename: Pradeep
authors.initials: P
authors.lastname: Kachroo
mesh_terms: D005609:Free Radicals / Q000378:metabolism*; D009569:Nitric Oxide / Q000378:metabolism; D010937:Plant Growth Regulators / Q000378:metabolism; D057865:Plant Immunity; D010944:Plants / Q000276:immunology* / Q000378:metabolism; D017382:Reactive Oxygen Species / Q000378:metabolism; D020156:Salicylic Acid / Q000378:metabolism; D015398:Signal Transduction
chemical_list: D005609:Free Radicals; D010937:Plant Growth Regulators; D017382:Reactive Oxygen Species; D009569:Nitric Oxide; D020156:Salicylic Acid