title: Transporters Involved in Root Nitrate Uptake and Sensing byArabidopsis.
abstract: Most plants use nitrate (NO3-) as their major nitrogen (N) source. The NO3-uptake capacity of a plant is determined by three interdependent factors that are sensitive to NO3-availability: (i) the functional properties of the transporters in roots that contribute to the acquisition of NO3-from the external medium, (ii) the density of functional transporters at the plasma membrane of root cells, and (iii) the surface and architecture of the root system. The identification of factors that regulate the NO3--sensing systems is important for both fundamental and applied science, because these factors control the capacity of plants to use the available NO3-, a process known as the "nitrate use efficiency." The molecular component of the transporters involved in uptake and sensing mechanism inArabidopsisroots are presented and their relative contribution discussed.
authors.affiliation: Laboratoire de Biochimie et Physiologie Moléculaire des Plantes, Institut de Biologie Intégrative des Plantes "Claude Grignon", UMR CNRS/INRA/SupAgro/UM Montpellier, France.
authors.forename: Mélanie
authors.initials: M
authors.lastname: Noguero
authors.affiliation: Laboratoire de Biochimie et Physiologie Moléculaire des Plantes, Institut de Biologie Intégrative des Plantes "Claude Grignon", UMR CNRS/INRA/SupAgro/UM Montpellier, France.
authors.forename: Benoît
authors.initials: B
authors.lastname: Lacombe
keywords: development; nitrates; nutrient sensing; plants; transporters