title: Root border cells and secretions as critical elements in plant host defense.
abstract: Border cells and border-like cells are released from the root tip as individual cells and small aggregates, or as a group of attached cells. These are viable components of the root system that play a key role in controlling root interaction with living microbes of the rhizosphere. As their separation from root tip proceeds, the cells synthesize and secrete a hydrated mucilage that contains polysaccharides, secondary metabolites, antimicrobial proteins and extracellular DNA (exDNA). This exDNA-based matrix seems to function in root defense in a way similar to that of recently characterized neutrophil extracellular traps (NETs) in mammalian cells. This review discusses the role of the cells and secreted compounds in the protection of root tip against microbial infections.
authors.affiliation: Laboratoire Glycobiologie et Matrice Extracellulaire Végétale (EA 4358), Grand Réseau de Recherche VASI Végétal-Agronomie-Sols et Innovations et Plate Forme d'Imagerie Cellulaire (PRIMACEN) de Haute Normandie, Université de Rouen, 76821 Mont Saint Aignan Cedex, France. azeddine.driouich@univ-rouen.fr
authors.forename: Azeddine
authors.initials: A
authors.lastname: Driouich
authors.forename: Marie-Laure
authors.initials: ML
authors.lastname: Follet-Gueye
authors.forename: Maïté
authors.initials: M
authors.lastname: Vicré-Gibouin
authors.forename: Martha
authors.initials: M
authors.lastname: Hawes
mesh_terms: D005109:Extracellular Matrix / Q000378:metabolism; D018519:Meristem / Q000276:immunology* / Q000378:metabolism / Q000382:microbiology*; D057865:Plant Immunity; D010944:Plants / Q000378:metabolism / Q000382:microbiology*; D058441:Rhizosphere