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  • 1.
    Escamez, Sacha
    et al.
    Umeå University, Faculty of Science and Technology, Department of Plant Physiology. Umeå University, Faculty of Science and Technology, Umeå Plant Science Centre (UPSC).
    André, Domenique
    Umeå University, Faculty of Science and Technology, Department of Plant Physiology. Umeå University, Faculty of Science and Technology, Umeå Plant Science Centre (UPSC).
    Sztojka, Bernadette
    Umeå University, Faculty of Science and Technology, Umeå Plant Science Centre (UPSC). Umeå University, Faculty of Science and Technology, Department of Plant Physiology.
    Bollhöner, Benjamin
    Umeå University, Faculty of Science and Technology, Department of Plant Physiology. Umeå University, Faculty of Science and Technology, Umeå Plant Science Centre (UPSC).
    Hall, Hardy
    Umeå University, Faculty of Science and Technology, Department of Plant Physiology. Umeå University, Faculty of Science and Technology, Umeå Plant Science Centre (UPSC).
    Berthet, Béatrice
    Voss, Ute
    Lers, Amnon
    Maizel, Alexis
    Andersson, Magnus
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Bennett, Malcolm
    Tuominen, Hannele
    Umeå University, Faculty of Science and Technology, Umeå Plant Science Centre (UPSC). Umeå University, Faculty of Science and Technology, Department of Plant Physiology.
    Cell Death in Cells Overlying Lateral Root Primordia Facilitates Organ Growth in Arabidopsis2020In: Current Biology, ISSN 0960-9822, E-ISSN 1879-0445, Vol. 30, no 3, p. 455-464Article in journal (Refereed)
    Abstract [en]

    Plant organ growth is widely accepted to be determined by cell division and cell expansion, but, unlike that in animals, the contribution of cell elimination has rarely been recognized. We investigated this paradigm during Arabidopsis lateral root formation, when the lateral root primordia (LRP) must traverse three overlying cell layers within the parent root. A subset of LRP-overlying cells displayed the induction of marker genes for cell types undergoing developmental cell death, and their cell death was detected by electron, confocal, and light sheet microscopy techniques. LRP growth was delayed in cell-deathdeficient mutants lacking the positive cell death regulator ORESARA1/ANAC092 (ORE1). LRP growth was restored in ore1-2 knockout plants by genetically inducing cell elimination in cells overlying the LRP or by physically killing LRP-overlying cells by ablation with optical tweezers. Our results support that, in addition to previously discovered mechanisms, cell elimination contributes to regulating lateral root emergence.

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  • 2.
    Pitsili, Eugenia
    et al.
    Centre for Research in Agricultural Genomics (CRAG), CSIC-IRTA-UAB-UB, Campus UAB, Bellaterra, Barcelona, Spain; Department of Plant Systems Biology, Department of Plant Biotechnology and Bioinformatics, Flanders Institute for Biotechnology, Ghent University, Ghent, Belgium.
    Rodriguez-Trevino, Ricardo
    Group of Plant Vascular Development, Swiss Federal Institute of Technology (ETH) Zurich, Zurich, Switzerland.
    Ruiz-Solani, Nerea
    Centre for Research in Agricultural Genomics (CRAG), CSIC-IRTA-UAB-UB, Campus UAB, Bellaterra, Barcelona, Spain.
    Demir, Fatih
    Central Institute for Engineering, Electronics and Analytics, ZEA-3, Forschungszentrum Jülich GmbH, Jülich, Germany; Cologne Excellence Cluster Cellular Stress Response in Aging-Associated Diseases (CECAD), Department of Chemistry, University of Cologne, Medical Faculty and University Hospital, Institute of Biochemistry, Joseph-Stelzmann-Str. 26, Cologne, Germany.
    Kastanaki, Elizabeth
    Group of Plant Vascular Development, Swiss Federal Institute of Technology (ETH) Zurich, Zurich, Switzerland.
    Dambire, Charlene
    School of Biosciences, University of Nottingham, Loughborough, United Kingdom.
    de Pedro-Jové, Roger
    Centre for Research in Agricultural Genomics (CRAG), CSIC-IRTA-UAB-UB, Campus UAB, Bellaterra, Barcelona, Spain.
    Vercammen, Dominique
    Department of Plant Systems Biology, Department of Plant Biotechnology and Bioinformatics, Flanders Institute for Biotechnology, Ghent University, Ghent, Belgium.
    Salguero-Linares, Jose
    Centre for Research in Agricultural Genomics (CRAG), CSIC-IRTA-UAB-UB, Campus UAB, Bellaterra, Barcelona, Spain.
    Hall, Hardy
    Umeå University, Faculty of Science and Technology, Department of Plant Physiology. Umeå University, Faculty of Science and Technology, Umeå Plant Science Centre (UPSC).
    Mantz, Melissa
    Central Institute for Engineering, Electronics and Analytics, ZEA-3, Forschungszentrum Jülich GmbH, Jülich, Germany; Cologne Excellence Cluster Cellular Stress Response in Aging-Associated Diseases (CECAD), Department of Chemistry, University of Cologne, Medical Faculty and University Hospital, Institute of Biochemistry, Joseph-Stelzmann-Str. 26, Cologne, Germany.
    Schuler, Martin
    Group of Plant Vascular Development, Swiss Federal Institute of Technology (ETH) Zurich, Zurich, Switzerland.
    Tuominen, Hannele
    Umeå University, Faculty of Science and Technology, Department of Plant Physiology. Umeå University, Faculty of Science and Technology, Umeå Plant Science Centre (UPSC).
    Van Breusegem, Frank
    Department of Plant Systems Biology, Department of Plant Biotechnology and Bioinformatics, Flanders Institute for Biotechnology, Ghent University, Ghent, Belgium.
    Valls, Marc
    Centre for Research in Agricultural Genomics (CRAG), CSIC-IRTA-UAB-UB, Campus UAB, Bellaterra, Barcelona, Spain; Department of Genetics, Universitat de Barcelona, Barcelona, Spain.
    Munné-Bosch, Sergi
    Department of Evolutionary Biology, Ecology and Environmental Sciences, Faculty of Biology, Universitat de Barcelona, Avinguda Diagonal 643, Barcelona, Spain; Institute of Research in Biodiversity (IRBio-UB), Universitat de Barcelona, Barcelona, Spain.
    Holdsworth, Michael J.
    School of Biosciences, University of Nottingham, Loughborough, United Kingdom.
    Huesgen, Pitter F.
    Central Institute for Engineering, Electronics and Analytics, ZEA-3, Forschungszentrum Jülich GmbH, Jülich, Germany; Cologne Excellence Cluster Cellular Stress Response in Aging-Associated Diseases (CECAD), Department of Chemistry, University of Cologne, Medical Faculty and University Hospital, Institute of Biochemistry, Joseph-Stelzmann-Str. 26, Cologne, Germany.
    Rodriguez-Villalon, Antia
    Group of Plant Vascular Development, Swiss Federal Institute of Technology (ETH) Zurich, Zurich, Switzerland.
    Coll, Nuria S.
    Centre for Research in Agricultural Genomics (CRAG), CSIC-IRTA-UAB-UB, Campus UAB, Bellaterra, Barcelona, Spain; Consejo Superior de Investigaciones Científicas (CSIC), Barcelona, Spain.
    A phloem-localized Arabidopsis metacaspase (AtMC3) improves drought tolerance2023In: New Phytologist, ISSN 0028-646X, E-ISSN 1469-8137, Vol. 239, p. 1281-1299Article in journal (Refereed)
    Abstract [en]

    Increasing drought phenomena pose a serious threat to agricultural productivity. Although plants have multiple ways to respond to the complexity of drought stress, the underlying mechanisms of stress sensing and signaling remain unclear. The role of the vasculature, in particular the phloem, in facilitating inter-organ communication is critical and poorly understood. Combining genetic, proteomic and physiological approaches, we investigated the role of AtMC3, a phloem-specific member of the metacaspase family, in osmotic stress responses in Arabidopsis thaliana. Analyses of the proteome in plants with altered AtMC3 levels revealed differential abundance of proteins related to osmotic stress pointing into a role of the protein in water-stress-related responses. Overexpression of AtMC3 conferred drought tolerance by enhancing the differentiation of specific vascular tissues and maintaining higher levels of vascular-mediated transportation, while plants lacking the protein showed an impaired response to drought and inability to respond effectively to the hormone abscisic acid. Overall, our data highlight the importance of AtMC3 and vascular plasticity in fine-tuning early drought responses at the whole plant level without affecting growth or yield.

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