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The Chara genome: Secondary complexity and implications for plant terrestrialization

Tomoaki Nishiyama 1, * Hidetoshi Sakayama 2, * Jan de Vries 3, 4 Henrik Buschmann 5 Denis Saint-Marcoux 6, 7, 8 Kristian K. Ullrich 9 Fabian B. Haas 9 Lisa Vanderstraeten 10 Dirk Becker 11 Daniel Lang 12 Stanislav Vosolsobě 13 Stephane Rombauts 10 Per K. I. Wilhelmsson 9 Philipp Janitza 14 Ramona Kern 15 Alexander Heyl 16 Florian Rümpler 17 Luz Irina A. Calderón Villalobos 18 John M. Clay Roman Skokan 13 Atsushi Toyoda 19 Yutaka Suzuki 20 Hiroshi Kagoshima 19 Elio Schijlen 21 Navindra Tajeshwar 16 Bruno Catarino 6 Alexander J. Hetherington 6 Assia Saltykova 10, 22 Clémence Bonnot 6 Holger Breuninger 6, 23 Aikaterini Symeonidi 9 Guru V. Radhakrishnan 24 Filip van Nieuwerburgh 10 Dieter Deforce 10 Caren Chang Kenneth G. Karol 25 Rainer Hedrich 11 Peter Ulvskov 26 Gernot Glöckner 27 Charles F. Delwiche Jan Petrasek 13 Yves van de Peer 10, 28 Jìrí Friml 29 Mary Beilby 30 Liam Dolan 6 Yuji Kohara 19 Sumio Sugano 20 Asao Fujiyama 19 Pierre-Marc Delaux 31 Marcel Quint 14, 18 Günter Theißen 17 Martin Hagemann 15 Jesper Harholt 32 Christophe Dunand 33, 34 Sabine Zachgo 5 Jane Langdale 6 Florian Maumus 35, 36 Dominique van der Straeten 10 Sven B. Gould 3 Stefan A. Rensing 9, 37, *
* Corresponding author
31 Evolution des Interactions Plantes-Microorganismes
LRSV - Laboratoire de Recherche en Sciences Végétales
33 Dynamique et Evolution des Parois cellulaires végétales
LRSV - Laboratoire de Recherche en Sciences Végétales
Abstract : Land plants evolved from charophytic algae, among which Charophyceae possess the most complex body plans. We present the genome of Chara braunii; comparison of the genome to those of land plants identified evolutionary novelties for plant terrestrialization and land plant heritage genes. C. braunii employs unique xylan synthases for cell wall biosynthesis, a phragmoplast (cell separation) mechanism similar to that of land plants, and many phytohormones. C. braunii plastids are controlled via land-plant-like retrograde signaling, and transcriptional regulation is more elaborate than in other algae. The morphological complexity of this organism may result from expanded gene families, with three cases of particular note: genes effecting tolerance to reactive oxygen species (ROS), LysM receptor-like kinases, and transcription factors (TFs). Transcriptomic analysis of sexual reproductive structures reveals intricate control by TFs, activity of the ROS gene network, and the ancestral use of plant-like storage and stress protection proteins in the zygote.
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Tomoaki Nishiyama, Hidetoshi Sakayama, Jan de Vries, Henrik Buschmann, Denis Saint-Marcoux, et al.. The Chara genome: Secondary complexity and implications for plant terrestrialization. Cell, Elsevier, 2018, 174 (2), pp.448-464. ⟨10.1016/j.cell.2018.06.033⟩. ⟨hal-02624417⟩

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