COMPOSITUM 1 contributes to the architectural simplification of barley inflorescence via meristem identity signals
In: ISSN: 2041-1723, 2020
academicJournal
Zugriff:
International audience ; Grasses have varying inflorescence shapes; however, little is known about the genetic mechanisms specifying such shapes among tribes. Here, we identify the grass-specific TCP transcription factor COMPOSITUM 1 (COM1) expressing in inflorescence meristematic boundaries of different grasses. COM1 specifies branch-inhibition in barley (Triticeae) versus branch-formation in non-Triticeae grasses. Analyses of cell size, cell walls and transcripts reveal barley COM1 regulates cell growth, thereby affecting cell wall properties and signaling specifically in meristematic boundaries to establish identity of adjacent meristems. COM1 acts upstream of the boundary gene Liguleless1 and confers meristem identity partially independent of the COM2 pathway. Furthermore, COM1 is subject to purifying natural selection, thereby contributing to specification of the spike inflorescence shape. This meristem identity pathway has conceptual implications for both inflorescence evolution and molecular breeding in Triticeae. Grasses have diverse inflorescence morphologies, but the underlying genetic mechanisms are unclear. Here, the authors report a TCP transcription factor COM1 affects cell growth through regulation of cell wall properties and promotes branch formation in non-Triticeae grasses but branch inhibition in barley (Triticeae).
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COMPOSITUM 1 contributes to the architectural simplification of barley inflorescence via meristem identity signals
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Autor/in / Beteiligte Person: | Poursarebani, Naser ; Trautewig, Corinna ; Melzer, Michael ; Nussbaumer, Thomas ; Lundqvist, Udda ; Rutten, Twan ; Schmutzer, Thomas ; Brandt, Ronny ; Himmelbach, Axel ; Altschmied, Lothar ; Koppolu, Ravi ; Youssef, Helmy ; Sibout, Richard ; Dalmais, Marion ; Bendahmane, Abdelhafid ; Stein, Nils ; Xin, Zhanguo ; Schnurbusch, Thorsten ; Leibniz Institute of Plant Genetics and Crop Plant Research Gatersleben (IPK-Gatersleben) ; Helmholtz Zentrum München (HMGU) ; Technical University of Munich and Helmholtz Center Munich ; Institute of Environmental Medicine ; WIK Wissenschaftliches Institut für Infrastruktur und Kommunikationsdienste Bad Honnef -WIK Wissenschaftliches Institut für Infrastruktur und Kommunikationsdienste Bad Honnef ; Nordic Genetic Resource Center (NordGen) ; Institute of Agricultural and Nutritional Sciences ; Faculty of Natural Sciences, III ; Martin-Luther-University Halle-Wittenberg-Martin-Luther-University Halle-Wittenberg ; Faculty of Agriculture ; University, Cairo ; Institut Jean-Pierre Bourgin (IJPB) ; AgroParisTech-Université Paris-Saclay-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) ; Unité de recherche sur les Biopolymères, Interactions Assemblages (BIA) ; Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) ; Institut des Sciences des Plantes de Paris-Saclay (IPS2 (UMR_9213 / UMR_1403)) ; Université d'Évry-Val-d'Essonne (UEVE)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) ; Cropping Systems Research Laboratory ; Plant Stress and Germplasm Development Unit ; United States Department of Agriculture - Agricultural Research Service (USDA-ARS)-United States Department of Agriculture - Agricultural Research Service (USDA-ARS) ; Martin-Luther-Universität Halle Wittenberg (MLU) ; Federal Ministry of Education & Research (BMBF) FKZ 0315954A 031B0201A ; German Research Foundation (DFG) SCHN 768/8-1 SCHN 768/15-1 ; IPK core budget |
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Zeitschrift: | ISSN: 2041-1723, 2020 |
Veröffentlichung: | HAL CCSD ; Nature Publishing Group, 2020 |
Medientyp: | academicJournal |
ISBN: | 978-0-00-583335-3 (print) ; 0-00-583335-3 (print) |
DOI: | 10.1038/s41467-020-18890-y |
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