title: On the origins of nitric oxide.
abstract: Nitric oxide (NO) is widely recognized for its role as signaling compound. However, the metabolic mechanisms that determine changes in the level of NO in plants are only poorly understood, despite this knowledge being crucial to understanding the signal function of NO. To date, at least seven possible pathways of NO biosynthesis have been described for plants, although the molecular and enzymatic components are resolved for only one of these. Currently, this represents the most significant bottleneck for NO research. In this review, we provide an overview of the multiplicity of NO production and scavenging pathways in plants. Furthermore, we discuss which areas should be focused on in future studies to investigate the origin of fluctuations in the level of NO in plants.
authors.affiliation: Energy Metabolism Research Group, Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476 Potsdam-Golm, Germany.
authors.forename: Kapuganti J
authors.initials: KJ
authors.lastname: Gupta
authors.forename: Alisdair R
authors.initials: AR
authors.lastname: Fernie
authors.forename: Werner M
authors.initials: WM
authors.lastname: Kaiser
authors.forename: Joost T
authors.initials: JT
authors.lastname: van Dongen
mesh_terms: D053898:Biosynthetic Pathways / Q000502:physiology*; D016166:Free Radical Scavengers / Q000378:metabolism; D018506:Gene Expression Regulation, Plant; D008954:Models, Biological; D009569:Nitric Oxide / Q000096:biosynthesis* / Q000378:metabolism; D010084:Oxidation-Reduction; D010944:Plants / Q000235:genetics / Q000378:metabolism*; D017382:Reactive Oxygen Species / Q000378:metabolism; D015398:Signal Transduction / Q000502:physiology*
chemical_list: D016166:Free Radical Scavengers; D017382:Reactive Oxygen Species; D009569:Nitric Oxide