title: A systems view of nitrogen nutrient and metabolite responses in Arabidopsis.
abstract: Nitrogen (N) is an essential macronutrient available to plants mainly as nitrate in agricultural soils. Besides its role as a nutrient, inorganic and organic N sources play key roles as signals that control genome-wide gene expression in Arabidopsis and other plant species. Genomics approaches have provided us with thousands of genes whose expression is modulated in response to N treatments in Arabidopsis. Recently, systems approaches have been utilized to map the complex molecular network that plants utilize to integrate metabolic, cellular, and developmental processes to successfully adapt to changing N availability. The challenge now is to understand the molecular mechanisms underlying N regulation of gene networks and bridge the gap between N sensing, signaling, and downstream physiological and developmental changes. We discuss recent advances in this direction.
authors.affiliation: Departamento de Genética Molecular y Microbiología, Pontificia Universidad Católica de Chile, Alameda 340, Santiago, Chile.
authors.forename: Elena A
authors.initials: EA
authors.lastname: Vidal
authors.forename: Rodrigo A
authors.initials: RA
authors.lastname: Gutiérrez
mesh_terms: D000222:Adaptation, Physiological; D017360:Arabidopsis / Q000187:drug effects / Q000235:genetics / Q000378:metabolism*; D018506:Gene Expression Regulation, Plant / Q000187:drug effects; D009566:Nitrates / Q000494:pharmacology; D009584:Nitrogen / Q000378:metabolism* / Q000494:pharmacology; D010937:Plant Growth Regulators / Q000378:metabolism; D018517:Plant Roots / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism; D015398:Signal Transduction / Q000187:drug effects / Q000502:physiology*; D049490:Systems Biology
chemical_list: D009566:Nitrates; D010937:Plant Growth Regulators; D009584:Nitrogen