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Cytokinin functions as an asymmetric and anti-gravitropic signal in lateral roots

S. Waidmann, M. Ruiz Rosquete, M. Schöller, E. Sarkel, H. Lindner, T. LaRue, I. Petřík, K. Dünser, S. Martopawiro, R. Sasidharan, O. Novak, K. Wabnik, JR. Dinneny, J. Kleine-Vehn,

. 2019 ; 10 (1) : 3540. [pub] 20190806

Jazyk angličtina Země Velká Británie

Typ dokumentu časopisecké články, práce podpořená grantem

Perzistentní odkaz   https://www.medvik.cz/link/bmc19044606

Directional organ growth allows the plant root system to strategically cover its surroundings. Intercellular auxin transport is aligned with the gravity vector in the primary root tips, facilitating downward organ bending at the lower root flank. Here we show that cytokinin signaling functions as a lateral root specific anti-gravitropic component, promoting the radial distribution of the root system. We performed a genome-wide association study and reveal that signal peptide processing of Cytokinin Oxidase 2 (CKX2) affects its enzymatic activity and, thereby, determines the degradation of cytokinins in natural Arabidopsis thaliana accessions. Cytokinin signaling interferes with growth at the upper lateral root flank and thereby prevents downward bending. Our interdisciplinary approach proposes that two phytohormonal cues at opposite organ flanks counterbalance each other's negative impact on growth, suppressing organ growth towards gravity and allow for radial expansion of the root system.

Citace poskytuje Crossref.org

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$a Waidmann, Sascha $u Department of Applied Genetics and Cell Biology, University of Natural Resources and Life Sciences, Vienna (BOKU), Muthgasse 18, 1190, Vienna, Austria.
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$a Cytokinin functions as an asymmetric and anti-gravitropic signal in lateral roots / $c S. Waidmann, M. Ruiz Rosquete, M. Schöller, E. Sarkel, H. Lindner, T. LaRue, I. Petřík, K. Dünser, S. Martopawiro, R. Sasidharan, O. Novak, K. Wabnik, JR. Dinneny, J. Kleine-Vehn,
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$a Directional organ growth allows the plant root system to strategically cover its surroundings. Intercellular auxin transport is aligned with the gravity vector in the primary root tips, facilitating downward organ bending at the lower root flank. Here we show that cytokinin signaling functions as a lateral root specific anti-gravitropic component, promoting the radial distribution of the root system. We performed a genome-wide association study and reveal that signal peptide processing of Cytokinin Oxidase 2 (CKX2) affects its enzymatic activity and, thereby, determines the degradation of cytokinins in natural Arabidopsis thaliana accessions. Cytokinin signaling interferes with growth at the upper lateral root flank and thereby prevents downward bending. Our interdisciplinary approach proposes that two phytohormonal cues at opposite organ flanks counterbalance each other's negative impact on growth, suppressing organ growth towards gravity and allow for radial expansion of the root system.
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$a Ruiz Rosquete, Michel $u Department of Applied Genetics and Cell Biology, University of Natural Resources and Life Sciences, Vienna (BOKU), Muthgasse 18, 1190, Vienna, Austria.
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$a Schöller, Maria $u Department of Applied Genetics and Cell Biology, University of Natural Resources and Life Sciences, Vienna (BOKU), Muthgasse 18, 1190, Vienna, Austria.
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$a Sarkel, Elizabeth $u Department of Applied Genetics and Cell Biology, University of Natural Resources and Life Sciences, Vienna (BOKU), Muthgasse 18, 1190, Vienna, Austria.
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$a Lindner, Heike $u Department of Biology, Stanford University, 260 Panama Street, Stanford, CA, 94305, USA.
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$a LaRue, Therese $u Department of Biology, Stanford University, 260 Panama Street, Stanford, CA, 94305, USA. Department of Plant Biology, Carnegie Institution for Science, 260 Panama Street, Stanford, CA, 94305, USA.
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$a Petřík, Ivan $u Laboratory of Growth Regulators, Centre of the Region Haná for Biotechnological and Agricultural Research, Faculty of Science of Palacký University and Institute of Experimental Botany of the Czech Academy of Sciences, Šlechtitelů 27, 78371, Olomouc, Czech Republic.
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$a Dünser, Kai $u Department of Applied Genetics and Cell Biology, University of Natural Resources and Life Sciences, Vienna (BOKU), Muthgasse 18, 1190, Vienna, Austria.
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$a Martopawiro, Shanice $u Plant Ecophysiology, Institute of Environmental Biology, Utrecht University, Padualaan 8, Utrecht, 3584 CH, The Netherlands.
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$a Sasidharan, Rashmi $u Plant Ecophysiology, Institute of Environmental Biology, Utrecht University, Padualaan 8, Utrecht, 3584 CH, The Netherlands.
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$a Novak, Ondrej $u Laboratory of Growth Regulators, Centre of the Region Haná for Biotechnological and Agricultural Research, Faculty of Science of Palacký University and Institute of Experimental Botany of the Czech Academy of Sciences, Šlechtitelů 27, 78371, Olomouc, Czech Republic.
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$a Wabnik, Krzysztof $u Centro de Biotecnología y Genómica de Plantas (Universidad Politécnica de Madrid - Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria), Autopista M-40, Km 38-Pozuelo de Alarcón, 28223, Madrid, Spain.
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$a Dinneny, José R $u Department of Biology, Stanford University, 260 Panama Street, Stanford, CA, 94305, USA. Department of Plant Biology, Carnegie Institution for Science, 260 Panama Street, Stanford, CA, 94305, USA.
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$a Kleine-Vehn, Jürgen $u Department of Applied Genetics and Cell Biology, University of Natural Resources and Life Sciences, Vienna (BOKU), Muthgasse 18, 1190, Vienna, Austria. juergen.kleine-vehn@boku.ac.at.
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