title: Transcription factors as potential participants in the signal transduction pathway of boron deficiency.
abstract: Boron (B) plays a well-known structural role in the cell wall, however the way of perceiving B deficiency by roots and transmitting this environmental signal to the nucleus to elicit a response is not well established. It is known that the direct interaction between Ca2+ sensors and transcription factors (TFs) is a necessary step to regulate the expression of downstream target genes in some signaling pathways. Interestingly, B deprivation affected gene expressions of several TFs belonging to MYB, WRKY, and bZIP families, as well as expressions of Ca2+ -related genes such as several CML (calmodulin-like protein) and CPK (Ca2+ -dependent protein kinase) genes. Taken together, these results suggest that B deficiency could affect the expression of downstream target genes by alteration of a calcium signaling pathway in which the interaction between CMLs and/or CPKs with TFs (activator or repressor) would be a crucial step, which would explain why some genes are upregulated whereas others are repressed upon B deprivation.
authors.affiliation: 1Departamento de Fisiología, Anatomía, y Biología Celular; Facultad de Ciencias Experimentales; Universidad Pablo de Olavide; Sevilla, Spain.
authors.forename: Agustín
authors.initials: A
authors.lastname: González-Fontes
authors.affiliation: 1Departamento de Fisiología, Anatomía, y Biología Celular; Facultad de Ciencias Experimentales; Universidad Pablo de Olavide; Sevilla, Spain.
authors.forename: Jesús
authors.initials: J
authors.lastname: Rexach
authors.affiliation: 1Departamento de Fisiología, Anatomía, y Biología Celular; Facultad de Ciencias Experimentales; Universidad Pablo de Olavide; Sevilla, Spain.
authors.forename: Carlos
authors.initials: C
authors.lastname: Quiles-Pando
authors.affiliation: 1Departamento de Fisiología, Anatomía, y Biología Celular; Facultad de Ciencias Experimentales; Universidad Pablo de Olavide; Sevilla, Spain.
authors.forename: M Begoña
authors.initials: MB
authors.lastname: Herrera-Rodríguez
authors.affiliation: 1Departamento de Fisiología, Anatomía, y Biología Celular; Facultad de Ciencias Experimentales; Universidad Pablo de Olavide; Sevilla, Spain.
authors.forename: Juan J
authors.initials: JJ
authors.lastname: Camacho-Cristóbal
authors.affiliation: 1Departamento de Fisiología, Anatomía, y Biología Celular; Facultad de Ciencias Experimentales; Universidad Pablo de Olavide; Sevilla, Spain.
authors.forename: M Teresa
authors.initials: MT
authors.lastname: Navarro-Gochicoa
mesh_terms: D017360:Arabidopsis / Q000235:genetics / Q000378:metabolism*; D029681:Arabidopsis Proteins / Q000378:metabolism; D001895:Boron / Q000172:deficiency*; D018506:Gene Expression Regulation, Plant; D018517:Plant Roots / Q000235:genetics; D036226:Seedlings / Q000235:genetics; D015398:Signal Transduction / Q000235:genetics; D014157:Transcription Factors / Q000235:genetics / Q000378:metabolism*
chemical_list: D029681:Arabidopsis Proteins; D014157:Transcription Factors; D001895:Boron
keywords: Ca2+-dependent protein kinases; arabidopsis; boron deficiency; calcium signaling; calmodulin-like proteins; transcription factors