Please use this identifier to cite or link to this item:
http://dx.doi.org/10.25673/108817
Title: | COMPOSITUM 1 contributes to the architectural simplification of barley inflorescence via meristem identity signals |
Author(s): | Poursarebani, Naser Trautewig, Corinna Melzer, Michael Nussbaumer, Thomas Lundqvist, Udda Rutten, Twan Schmutzer, Thomas Brandt, Ronny Himmelbach, Axel Altschmied, Lothar Koppolu, Ravi Youssef, Helmy M. Sibout, Richard Dalmais, Marion Bendahmane, Abdelhafid Stein, Nils Xin, Zhanguo Schnurbusch, Thorsten |
Issue Date: | 2020 |
Type: | Article |
Language: | English |
Abstract: | 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. |
URI: | https://opendata.uni-halle.de//handle/1981185920/110772 http://dx.doi.org/10.25673/108817 |
Open Access: | Open access publication |
License: | (CC BY 4.0) Creative Commons Attribution 4.0 |
Journal Title: | Nature Communications |
Publisher: | Nature Publishing Group UK |
Publisher Place: | [London] |
Volume: | 11 |
Original Publication: | 10.1038/s41467-020-18890-y |
Page Start: | 1 |
Page End: | 16 |
Appears in Collections: | Open Access Publikationen der MLU |
Files in This Item:
File | Description | Size | Format | |
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s41467-020-18890-y.pdf | 9.98 MB | Adobe PDF | View/Open |