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Title: GEMMA CUP-ASSOCIATED MYB1, an Ortholog of Axillary Meristem Regulators, Is Essential in Vegetative Reproduction in Marchantia polymorpha
Authors: Yasui, Yukiko  kyouindb  KAKEN_id
Tsukamoto, Shigeyuki
Sugaya, Tomomi
Nishihama, Ryuichi  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0002-7032-732X (unconfirmed)
Wang, Quan
Kato, Hirotaka
Yamato, Katsuyuki T.
Fukaki, Hidehiro
Mimura, Tetsuro
Kubo, Hiroyoshi
Theres, Klaus
Kohchi, Takayuki  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0002-9712-4872 (unconfirmed)
Ishizaki, Kimitsune
Author's alias: 安居, 佑季子
大和, 勝幸
久保, 浩義
河内, 孝之
石崎, 公庸
Keywords: asexual reproduction
stem cell
bryophytes
evolution
Issue Date: 2-Dec-2019
Publisher: Elsevier BV
Journal title: Current Biology
Volume: 29
Issue: 23
Start page: 3987
End page: 3995.e5
Abstract: A variety of plants in diverse taxa can reproduce asexually via vegetative propagation, in which clonal propagules with a new meristem(s) are generated directly from vegetative organs. A basal land plant, Marchantia polymorpha, develops clonal propagules, gemmae, on the gametophyte thallus from the basal epidermis of a specialized receptacle, the gemma cup. Here we report an R2R3-MYB transcription factor, designated GEMMA CUP-ASSOCIATED MYB1 (GCAM1), which is an essential regulator of gemma cup development in M. polymorpha. Targeted disruption of GCAM1 conferred a complete loss of gemma cup formation and gemma generation. Ectopic overexpression of GCAM1 resulted in formation of cell clumps, suggesting a function of GCAM1 in suppression of cell differentiation. Although gemma cups are a characteristic gametophyte organ for vegetative reproduction in a taxonomically restricted group of liverwort species, phylogenetic and interspecific complementation analyses support the orthologous relationship of GCAM1 to regulatory factors of axillary meristem formation, e.g., Arabidopsis REGULATOR OF AXILLARY MERISTEMS and tomato Blind, in angiosperm sporophytes. The present findings in M. polymorpha suggest an ancient acquisition of a transcriptional regulator for production of asexual propagules in the gametophyte and the use of the regulatory factor for diverse developmental programs, including axillary meristem formation, during land plant evolution.
Description: 植物が芽を増やすための太古から受け継がれた仕組みを解明. 京都大学プレスリリース. 2019-11-12.
Rights: © 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
The full-text file will be made open to the public on 2 December 2020 in accordance with publisher's 'Terms and Conditions for Self-Archiving'.
This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。
URI: http://hdl.handle.net/2433/245190
DOI(Published Version): 10.1016/j.cub.2019.10.004
PubMed ID: 31708390
Related Link: https://www.kyoto-u.ac.jp/ja/research-news/2019-11-12-0
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