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Directional auxin transport mechanisms in early diverging land plants

  • Viaene, Tom Department of Plant Systems Biology, VIB, and Department of Plant Biotechnology and Genetics, Ghent University, Belgium
  • Landberg, Katarina Department of Plant Biology, Uppsala BioCenter, Linnean Centre of Plant Biology in Uppsala, Swedish University of Agricultural Sciences, Sweden
  • Thelander, Mattias Department of Plant Biology, Uppsala BioCenter, Linnean Centre of Plant Biology in Uppsala, Swedish University of Agricultural Sciences, Sweden
  • Medvecka, Eva Department of Plant Systems Biology, VIB, and Department of Plant Biotechnology and Genetics, Ghent University, Belgium - Mendel Centre for Genomics and Proteomics of Plants Systems, Central European Institute of Technology (CEITEC MU), Masaryk University, Brno, Czech Republic
  • Pederson, Eric Department of Plant Biology, Uppsala BioCenter, Linnean Centre of Plant Biology in Uppsala, Swedish University of Agricultural Sciences, Sweden
  • Feraru, Elena Department of Plant Systems Biology, VIB, and Department of Plant Biotechnology and Genetics, Ghent University, Belgium -
  • Cooper, Endymion D. Cell Biology and Molecular Genetics and the Maryland Agricultural Experiment Station, University of Maryland, College Park, USA
  • Karimi, Mansour Department of Plant Systems Biology, VIB, and Department of Plant Biotechnology and Genetics, Ghent University, Belgium
  • Delwiche, Charles F. Cell Biology and Molecular Genetics and the Maryland Agricultural Experiment Station, University of Maryland, College Park, USA
  • Ljung, Karin Department of Forest Genetics and Plant Physiology, Umeå Plant Science Centre, Swedish University of Agricultural Sciences, Umeå, Sweden
  • Geisler, Markus Plant Biology, Department of Biology, University of Fribourg, Switzerland
  • Sundberg, Eva Department of Plant Biology, Uppsala BioCenter, Linnean Centre of Plant Biology in Uppsala, Swedish University of Agricultural Sciences, Sweden
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    01.12.2014
Published in:
  • Current Biology. - 2014, vol. 24, no. 23, p. 2786–2791
English The emergence and radiation of multicellular land plants was driven by crucial innovations to their body plans [1]. The directional transport of the phytohormone auxin represents a key, plant-specific mechanism for polarization and patterning in complex seed plants [2, 3, 4 and 5]. Here, we show that already in the early diverging land plant lineage, as exemplified by the moss Physcomitrella patens, auxin transport by PIN transporters is operational and diversified into ER-localized and plasma membrane-localized PIN proteins. Gain-of-function and loss-of-function analyses revealed that PIN-dependent intercellular auxin transport in Physcomitrella mediates crucial developmental transitions in tip-growing filaments and waves of polarization and differentiation in leaf-like structures. Plasma membrane PIN proteins localize in a polar manner to the tips of moss filaments, revealing an unexpected relation between polarization mechanisms in moss tip-growing cells and multicellular tissues of seed plants. Our results trace the origins of polarization and auxin-mediated patterning mechanisms and highlight the crucial role of polarized auxin transport during the evolution of multicellular land plants.
Faculty
Faculté des sciences et de médecine
Department
Département de Biologie
Language
  • English
Classification
Biological sciences
License
License undefined
Identifiers
Persistent URL
https://folia.unifr.ch/unifr/documents/304040
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