Your browser doesn't support javascript.
loading
Light Controls Cytokinin Signaling via Transcriptional Regulation of Constitutively Active Sensor Histidine Kinase CKI1.
Dobisova, Tereza; Hrdinova, Vendula; Cuesta, Candela; Michlickova, Sarka; Urbankova, Ivana; Hejatkova, Romana; Zadnikova, Petra; Pernisova, Marketa; Benkova, Eva; Hejatko, Jan.
Afiliación
  • Dobisova T; CEITEC - Central European Institute of Technology and National Centre for Biomolecular Research, Masaryk University, CZ-62500, Brno, Czech Republic (T.D., V.H., S.M., I.U., R.H., P.Z., M.P., E.B., J.H.); and Institute of Science and Technology Austria, 3400 Klosterneuburg, Austria (C.C., P.Z., E.B.)
  • Hrdinova V; CEITEC - Central European Institute of Technology and National Centre for Biomolecular Research, Masaryk University, CZ-62500, Brno, Czech Republic (T.D., V.H., S.M., I.U., R.H., P.Z., M.P., E.B., J.H.); and Institute of Science and Technology Austria, 3400 Klosterneuburg, Austria (C.C., P.Z., E.B.)
  • Cuesta C; CEITEC - Central European Institute of Technology and National Centre for Biomolecular Research, Masaryk University, CZ-62500, Brno, Czech Republic (T.D., V.H., S.M., I.U., R.H., P.Z., M.P., E.B., J.H.); and Institute of Science and Technology Austria, 3400 Klosterneuburg, Austria (C.C., P.Z., E.B.)
  • Michlickova S; CEITEC - Central European Institute of Technology and National Centre for Biomolecular Research, Masaryk University, CZ-62500, Brno, Czech Republic (T.D., V.H., S.M., I.U., R.H., P.Z., M.P., E.B., J.H.); and Institute of Science and Technology Austria, 3400 Klosterneuburg, Austria (C.C., P.Z., E.B.)
  • Urbankova I; CEITEC - Central European Institute of Technology and National Centre for Biomolecular Research, Masaryk University, CZ-62500, Brno, Czech Republic (T.D., V.H., S.M., I.U., R.H., P.Z., M.P., E.B., J.H.); and Institute of Science and Technology Austria, 3400 Klosterneuburg, Austria (C.C., P.Z., E.B.)
  • Hejatkova R; CEITEC - Central European Institute of Technology and National Centre for Biomolecular Research, Masaryk University, CZ-62500, Brno, Czech Republic (T.D., V.H., S.M., I.U., R.H., P.Z., M.P., E.B., J.H.); and Institute of Science and Technology Austria, 3400 Klosterneuburg, Austria (C.C., P.Z., E.B.)
  • Zadnikova P; CEITEC - Central European Institute of Technology and National Centre for Biomolecular Research, Masaryk University, CZ-62500, Brno, Czech Republic (T.D., V.H., S.M., I.U., R.H., P.Z., M.P., E.B., J.H.); and Institute of Science and Technology Austria, 3400 Klosterneuburg, Austria (C.C., P.Z., E.B.)
  • Pernisova M; CEITEC - Central European Institute of Technology and National Centre for Biomolecular Research, Masaryk University, CZ-62500, Brno, Czech Republic (T.D., V.H., S.M., I.U., R.H., P.Z., M.P., E.B., J.H.); and Institute of Science and Technology Austria, 3400 Klosterneuburg, Austria (C.C., P.Z., E.B.)
  • Benkova E; CEITEC - Central European Institute of Technology and National Centre for Biomolecular Research, Masaryk University, CZ-62500, Brno, Czech Republic (T.D., V.H., S.M., I.U., R.H., P.Z., M.P., E.B., J.H.); and Institute of Science and Technology Austria, 3400 Klosterneuburg, Austria (C.C., P.Z., E.B.)
  • Hejatko J; CEITEC - Central European Institute of Technology and National Centre for Biomolecular Research, Masaryk University, CZ-62500, Brno, Czech Republic (T.D., V.H., S.M., I.U., R.H., P.Z., M.P., E.B., J.H.); and Institute of Science and Technology Austria, 3400 Klosterneuburg, Austria (C.C., P.Z., E.B.)
Plant Physiol ; 174(1): 387-404, 2017 May.
Article en En | MEDLINE | ID: mdl-28292856
In plants, the multistep phosphorelay (MSP) pathway mediates a range of regulatory processes, including those activated by cytokinins. The cross talk between cytokinin response and light has been known for a long time. However, the molecular mechanism underlying the interaction between light and cytokinin signaling remains elusive. In the screen for upstream regulators we identified a LONG PALE HYPOCOTYL (LPH) gene whose activity is indispensable for spatiotemporally correct expression of CYTOKININ INDEPENDENT1 (CKI1), encoding the constitutively active sensor His kinase that activates MSP signaling. lph is a new allele of HEME OXYGENASE1 (HY1) that encodes the key protein in the biosynthesis of phytochromobilin, a cofactor of photoconvertible phytochromes. Our analysis confirmed the light-dependent regulation of the CKI1 expression pattern. We show that CKI1 expression is under the control of phytochrome A (phyA), functioning as a dual (both positive and negative) regulator of CKI1 expression, presumably via the phyA-regulated transcription factors (TF) PHYTOCHROME INTERACTING FACTOR3 and CIRCADIAN CLOCK ASSOCIATED1. Changes in CKI1 expression observed in lph/hy1-7 and phy mutants correlate with misregulation of MSP signaling, changed cytokinin sensitivity, and developmental aberrations that were previously shown to be associated with cytokinin and/or CKI1 action. Besides that, we demonstrate a novel role of phyA-dependent CKI1 expression in the hypocotyl elongation and hook development during skotomorphogenesis. Based on these results, we propose that the light-dependent regulation of CKI1 provides a plausible mechanistic link underlying the well-known interaction between light- and cytokinin-controlled plant development.
Asunto(s)
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Proteínas Quinasas / Transducción de Señal / Arabidopsis / Regulación de la Expresión Génica de las Plantas / Citocininas / Proteínas de Arabidopsis / Luz Tipo de estudio: Prognostic_studies Idioma: En Revista: Plant Physiol Año: 2017 Tipo del documento: Article Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Proteínas Quinasas / Transducción de Señal / Arabidopsis / Regulación de la Expresión Génica de las Plantas / Citocininas / Proteínas de Arabidopsis / Luz Tipo de estudio: Prognostic_studies Idioma: En Revista: Plant Physiol Año: 2017 Tipo del documento: Article Pais de publicación: Estados Unidos