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Mohan TC, Castrillo G, Navarro C, Zarco-Fernández S, Ramireddy E, Mateo C, Zamarreño AM, Paz-Ares J, Muñoz R, García-Mina JM, Hernández LE, Schmülling T, Leyva A. Cytokinin Determines Thiol-Mediated Arsenic Tolerance and Accumulation. Plant Physiol 2016; 171:1418-26. [PMID: 27208271 PMCID: PMC4902620 DOI: 10.1104/pp.16.00372] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2016] [Accepted: 04/12/2016] [Indexed: 05/09/2023]
Abstract
The presence of arsenic in soil and water is a constant threat to plant growth in many regions of the world. Phytohormones act in the integration of growth control and stress response, but their role in plant responses to arsenic remains to be elucidated. Here, we show that arsenate [As(V)], the most prevalent arsenic chemical species in nature, causes severe depletion of endogenous cytokinins (CKs) in the model plant Arabidopsis (Arabidopsis thaliana). We found that CK signaling mutants and transgenic plants with reduced endogenous CK levels showed an As(V)-tolerant phenotype. Our data indicate that in CK-depleted plants exposed to As(V), transcript levels of As(V)/phosphate-transporters were similar or even higher than in wild-type plants. In contrast, CK depletion provoked the coordinated activation of As(V) tolerance mechanisms, leading to the accumulation of thiol compounds such as phytochelatins and glutathione, which are essential for arsenic sequestration. Transgenic CK-deficient Arabidopsis and tobacco lines show a marked increase in arsenic accumulation. Our findings indicate that CK is an important regulatory factor in plant adaptation to arsenic stress.
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Affiliation(s)
- Thotegowdanapalya C Mohan
- Department of Plant Molecular Genetics, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas (CSIC), Campus de Cantoblanco, 28049 Madrid, Spain (T.C.M., G.C., C.N., C.M., J.P.-A., A.L.); Department of Analytical Chemistry, School of Chemical Sciences, Universidad Complutense de Madrid, Madrid, Spain (S.Z.-F., R.M.); Institute of Biology/Applied Genetics, Dahlem Centre of Plant Sciences, Freie Universität Berlin, Albrecht-Thaer-Weg 6, D-14195 Berlin, Germany (E.R., T.S.); Department of Environmental Biology (Agricultural Chemistry and Biology Group), Faculty of Sciences, University of Navarra, Sciencies Building, 31008 Pamplona, Spain (A.M.Z., J.M.G.-M.); and Departamento de Biología, Universidad Autónoma de Madrid, Edif. de Biológicas BS13, Campus de Cantoblanco, 28049 Madrid, Spain (L.E.H.)
| | - Gabriel Castrillo
- Department of Plant Molecular Genetics, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas (CSIC), Campus de Cantoblanco, 28049 Madrid, Spain (T.C.M., G.C., C.N., C.M., J.P.-A., A.L.); Department of Analytical Chemistry, School of Chemical Sciences, Universidad Complutense de Madrid, Madrid, Spain (S.Z.-F., R.M.); Institute of Biology/Applied Genetics, Dahlem Centre of Plant Sciences, Freie Universität Berlin, Albrecht-Thaer-Weg 6, D-14195 Berlin, Germany (E.R., T.S.); Department of Environmental Biology (Agricultural Chemistry and Biology Group), Faculty of Sciences, University of Navarra, Sciencies Building, 31008 Pamplona, Spain (A.M.Z., J.M.G.-M.); and Departamento de Biología, Universidad Autónoma de Madrid, Edif. de Biológicas BS13, Campus de Cantoblanco, 28049 Madrid, Spain (L.E.H.)
| | - Cristina Navarro
- Department of Plant Molecular Genetics, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas (CSIC), Campus de Cantoblanco, 28049 Madrid, Spain (T.C.M., G.C., C.N., C.M., J.P.-A., A.L.); Department of Analytical Chemistry, School of Chemical Sciences, Universidad Complutense de Madrid, Madrid, Spain (S.Z.-F., R.M.); Institute of Biology/Applied Genetics, Dahlem Centre of Plant Sciences, Freie Universität Berlin, Albrecht-Thaer-Weg 6, D-14195 Berlin, Germany (E.R., T.S.); Department of Environmental Biology (Agricultural Chemistry and Biology Group), Faculty of Sciences, University of Navarra, Sciencies Building, 31008 Pamplona, Spain (A.M.Z., J.M.G.-M.); and Departamento de Biología, Universidad Autónoma de Madrid, Edif. de Biológicas BS13, Campus de Cantoblanco, 28049 Madrid, Spain (L.E.H.)
| | - Sonia Zarco-Fernández
- Department of Plant Molecular Genetics, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas (CSIC), Campus de Cantoblanco, 28049 Madrid, Spain (T.C.M., G.C., C.N., C.M., J.P.-A., A.L.); Department of Analytical Chemistry, School of Chemical Sciences, Universidad Complutense de Madrid, Madrid, Spain (S.Z.-F., R.M.); Institute of Biology/Applied Genetics, Dahlem Centre of Plant Sciences, Freie Universität Berlin, Albrecht-Thaer-Weg 6, D-14195 Berlin, Germany (E.R., T.S.); Department of Environmental Biology (Agricultural Chemistry and Biology Group), Faculty of Sciences, University of Navarra, Sciencies Building, 31008 Pamplona, Spain (A.M.Z., J.M.G.-M.); and Departamento de Biología, Universidad Autónoma de Madrid, Edif. de Biológicas BS13, Campus de Cantoblanco, 28049 Madrid, Spain (L.E.H.)
| | - Eswarayya Ramireddy
- Department of Plant Molecular Genetics, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas (CSIC), Campus de Cantoblanco, 28049 Madrid, Spain (T.C.M., G.C., C.N., C.M., J.P.-A., A.L.); Department of Analytical Chemistry, School of Chemical Sciences, Universidad Complutense de Madrid, Madrid, Spain (S.Z.-F., R.M.); Institute of Biology/Applied Genetics, Dahlem Centre of Plant Sciences, Freie Universität Berlin, Albrecht-Thaer-Weg 6, D-14195 Berlin, Germany (E.R., T.S.); Department of Environmental Biology (Agricultural Chemistry and Biology Group), Faculty of Sciences, University of Navarra, Sciencies Building, 31008 Pamplona, Spain (A.M.Z., J.M.G.-M.); and Departamento de Biología, Universidad Autónoma de Madrid, Edif. de Biológicas BS13, Campus de Cantoblanco, 28049 Madrid, Spain (L.E.H.)
| | - Cristian Mateo
- Department of Plant Molecular Genetics, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas (CSIC), Campus de Cantoblanco, 28049 Madrid, Spain (T.C.M., G.C., C.N., C.M., J.P.-A., A.L.); Department of Analytical Chemistry, School of Chemical Sciences, Universidad Complutense de Madrid, Madrid, Spain (S.Z.-F., R.M.); Institute of Biology/Applied Genetics, Dahlem Centre of Plant Sciences, Freie Universität Berlin, Albrecht-Thaer-Weg 6, D-14195 Berlin, Germany (E.R., T.S.); Department of Environmental Biology (Agricultural Chemistry and Biology Group), Faculty of Sciences, University of Navarra, Sciencies Building, 31008 Pamplona, Spain (A.M.Z., J.M.G.-M.); and Departamento de Biología, Universidad Autónoma de Madrid, Edif. de Biológicas BS13, Campus de Cantoblanco, 28049 Madrid, Spain (L.E.H.)
| | - Angel M Zamarreño
- Department of Plant Molecular Genetics, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas (CSIC), Campus de Cantoblanco, 28049 Madrid, Spain (T.C.M., G.C., C.N., C.M., J.P.-A., A.L.); Department of Analytical Chemistry, School of Chemical Sciences, Universidad Complutense de Madrid, Madrid, Spain (S.Z.-F., R.M.); Institute of Biology/Applied Genetics, Dahlem Centre of Plant Sciences, Freie Universität Berlin, Albrecht-Thaer-Weg 6, D-14195 Berlin, Germany (E.R., T.S.); Department of Environmental Biology (Agricultural Chemistry and Biology Group), Faculty of Sciences, University of Navarra, Sciencies Building, 31008 Pamplona, Spain (A.M.Z., J.M.G.-M.); and Departamento de Biología, Universidad Autónoma de Madrid, Edif. de Biológicas BS13, Campus de Cantoblanco, 28049 Madrid, Spain (L.E.H.)
| | - Javier Paz-Ares
- Department of Plant Molecular Genetics, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas (CSIC), Campus de Cantoblanco, 28049 Madrid, Spain (T.C.M., G.C., C.N., C.M., J.P.-A., A.L.); Department of Analytical Chemistry, School of Chemical Sciences, Universidad Complutense de Madrid, Madrid, Spain (S.Z.-F., R.M.); Institute of Biology/Applied Genetics, Dahlem Centre of Plant Sciences, Freie Universität Berlin, Albrecht-Thaer-Weg 6, D-14195 Berlin, Germany (E.R., T.S.); Department of Environmental Biology (Agricultural Chemistry and Biology Group), Faculty of Sciences, University of Navarra, Sciencies Building, 31008 Pamplona, Spain (A.M.Z., J.M.G.-M.); and Departamento de Biología, Universidad Autónoma de Madrid, Edif. de Biológicas BS13, Campus de Cantoblanco, 28049 Madrid, Spain (L.E.H.)
| | - Riansares Muñoz
- Department of Plant Molecular Genetics, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas (CSIC), Campus de Cantoblanco, 28049 Madrid, Spain (T.C.M., G.C., C.N., C.M., J.P.-A., A.L.); Department of Analytical Chemistry, School of Chemical Sciences, Universidad Complutense de Madrid, Madrid, Spain (S.Z.-F., R.M.); Institute of Biology/Applied Genetics, Dahlem Centre of Plant Sciences, Freie Universität Berlin, Albrecht-Thaer-Weg 6, D-14195 Berlin, Germany (E.R., T.S.); Department of Environmental Biology (Agricultural Chemistry and Biology Group), Faculty of Sciences, University of Navarra, Sciencies Building, 31008 Pamplona, Spain (A.M.Z., J.M.G.-M.); and Departamento de Biología, Universidad Autónoma de Madrid, Edif. de Biológicas BS13, Campus de Cantoblanco, 28049 Madrid, Spain (L.E.H.)
| | - Jose M García-Mina
- Department of Plant Molecular Genetics, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas (CSIC), Campus de Cantoblanco, 28049 Madrid, Spain (T.C.M., G.C., C.N., C.M., J.P.-A., A.L.); Department of Analytical Chemistry, School of Chemical Sciences, Universidad Complutense de Madrid, Madrid, Spain (S.Z.-F., R.M.); Institute of Biology/Applied Genetics, Dahlem Centre of Plant Sciences, Freie Universität Berlin, Albrecht-Thaer-Weg 6, D-14195 Berlin, Germany (E.R., T.S.); Department of Environmental Biology (Agricultural Chemistry and Biology Group), Faculty of Sciences, University of Navarra, Sciencies Building, 31008 Pamplona, Spain (A.M.Z., J.M.G.-M.); and Departamento de Biología, Universidad Autónoma de Madrid, Edif. de Biológicas BS13, Campus de Cantoblanco, 28049 Madrid, Spain (L.E.H.)
| | - Luis E Hernández
- Department of Plant Molecular Genetics, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas (CSIC), Campus de Cantoblanco, 28049 Madrid, Spain (T.C.M., G.C., C.N., C.M., J.P.-A., A.L.); Department of Analytical Chemistry, School of Chemical Sciences, Universidad Complutense de Madrid, Madrid, Spain (S.Z.-F., R.M.); Institute of Biology/Applied Genetics, Dahlem Centre of Plant Sciences, Freie Universität Berlin, Albrecht-Thaer-Weg 6, D-14195 Berlin, Germany (E.R., T.S.); Department of Environmental Biology (Agricultural Chemistry and Biology Group), Faculty of Sciences, University of Navarra, Sciencies Building, 31008 Pamplona, Spain (A.M.Z., J.M.G.-M.); and Departamento de Biología, Universidad Autónoma de Madrid, Edif. de Biológicas BS13, Campus de Cantoblanco, 28049 Madrid, Spain (L.E.H.)
| | - Thomas Schmülling
- Department of Plant Molecular Genetics, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas (CSIC), Campus de Cantoblanco, 28049 Madrid, Spain (T.C.M., G.C., C.N., C.M., J.P.-A., A.L.); Department of Analytical Chemistry, School of Chemical Sciences, Universidad Complutense de Madrid, Madrid, Spain (S.Z.-F., R.M.); Institute of Biology/Applied Genetics, Dahlem Centre of Plant Sciences, Freie Universität Berlin, Albrecht-Thaer-Weg 6, D-14195 Berlin, Germany (E.R., T.S.); Department of Environmental Biology (Agricultural Chemistry and Biology Group), Faculty of Sciences, University of Navarra, Sciencies Building, 31008 Pamplona, Spain (A.M.Z., J.M.G.-M.); and Departamento de Biología, Universidad Autónoma de Madrid, Edif. de Biológicas BS13, Campus de Cantoblanco, 28049 Madrid, Spain (L.E.H.)
| | - Antonio Leyva
- Department of Plant Molecular Genetics, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas (CSIC), Campus de Cantoblanco, 28049 Madrid, Spain (T.C.M., G.C., C.N., C.M., J.P.-A., A.L.); Department of Analytical Chemistry, School of Chemical Sciences, Universidad Complutense de Madrid, Madrid, Spain (S.Z.-F., R.M.); Institute of Biology/Applied Genetics, Dahlem Centre of Plant Sciences, Freie Universität Berlin, Albrecht-Thaer-Weg 6, D-14195 Berlin, Germany (E.R., T.S.); Department of Environmental Biology (Agricultural Chemistry and Biology Group), Faculty of Sciences, University of Navarra, Sciencies Building, 31008 Pamplona, Spain (A.M.Z., J.M.G.-M.); and Departamento de Biología, Universidad Autónoma de Madrid, Edif. de Biológicas BS13, Campus de Cantoblanco, 28049 Madrid, Spain (L.E.H.)
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