title: Beyond the barrier: communication in the root through the endodermis.
abstract: The root endodermis is characterized by the Casparian strip and by the suberin lamellae, two hydrophobic barriers that restrict the free diffusion of molecules between the inner cell layers of the root and the outer environment. The presence of these barriers and the position of the endodermis between the inner and outer parts of the root require that communication between these two domains acts through the endodermis. Recent work on hormone signaling, propagation of calcium waves, and plant-fungal symbiosis has provided evidence in support of the hypothesis that the endodermis acts as a signaling center. The endodermis is also a unique mechanical barrier to organogenesis, which must be overcome through chemical and mechanical cross talk between cell layers to allow for development of new lateral organs while maintaining its barrier functions. In this review, we discuss recent findings regarding these two important aspects of the endodermis.
authors.affiliation: Department of Plant Biology, Carnegie Institution for Science, Stanford, California 94305 (N.E.R., C.T., L.D., J.R.D.); andDepartment of Biology, Stanford University, Stanford, California 94305 (N.E.R.).
authors.forename: Neil E
authors.identifier: http://orcid.org/0000-0001-5534-3666
authors.initials: NE
authors.lastname: Robbins
authors.affiliation: Department of Plant Biology, Carnegie Institution for Science, Stanford, California 94305 (N.E.R., C.T., L.D., J.R.D.); andDepartment of Biology, Stanford University, Stanford, California 94305 (N.E.R.).
authors.forename: Charlotte
authors.initials: C
authors.lastname: Trontin
authors.affiliation: Department of Plant Biology, Carnegie Institution for Science, Stanford, California 94305 (N.E.R., C.T., L.D., J.R.D.); andDepartment of Biology, Stanford University, Stanford, California 94305 (N.E.R.).
authors.forename: Lina
authors.initials: L
authors.lastname: Duan
authors.affiliation: Department of Plant Biology, Carnegie Institution for Science, Stanford, California 94305 (N.E.R., C.T., L.D., J.R.D.); andDepartment of Biology, Stanford University, Stanford, California 94305 (N.E.R.) jdinneny@carnegiescience.edu.
authors.forename: José R
authors.identifier: http://orcid.org/0000-0002-3998-724X
authors.initials: JR
authors.lastname: Dinneny
mesh_terms: D002118:Calcium / Q000378:metabolism; D005658:Fungi / Q000502:physiology; D009024:Morphogenesis; D018517:Plant Roots / Q000378:metabolism / Q000382:microbiology / Q000502:physiology*; D015398:Signal Transduction; D013559:Symbiosis; D014867:Water
chemical_list: D014867:Water; D002118:Calcium