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Cytokinin Signaling Is Essential for Organ Formation in Marchantia polymorpha
http://hdl.handle.net/10061/13353
http://hdl.handle.net/10061/1335393bdd058-368f-43f5-a4f7-b9581a053723
名前 / ファイル | ライセンス | アクション |
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fulltext (10.3 MB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2020-05-28 | |||||
タイトル | ||||||
タイトル | Cytokinin Signaling Is Essential for Organ Formation in Marchantia polymorpha | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Marchantia polymorpha | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Cytokinin; organogenesis | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | plant evolution | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | response regulator | |||||
資源タイプ | ||||||
資源タイプ | journal article | |||||
アクセス権 | ||||||
アクセス権 | open access | |||||
著者 |
安喜, 史織
× 安喜, 史織× Mikami, Tatsuya× Naramoto, Satoshi× Nishihama, Ryuichi× Ishizaki, Kimitsune× Kojima, Mikiko× Takebayashi, Yumiko× Sakakibara, Hitoshi× Kyozuka, Junko× Kohchi, Takayuki× Umeda, Masaaki |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Cytokinins are known to regulate various physiological events in plants. Cytokinin signaling is mediated by the phosphorelay system, one of the most ancient mechanisms controlling hormonal pathways in plants. The liverwort Marchantia polymorpha possesses all components necessary for cytokinin signaling; however, whether they respond to cytokinins and how the signaling is fine-tuned remain largely unknown. Here, we report cytokinin function in Marchantia development and organ formation. Our measurement of cytokinin species revealed that cis-zeatin is the most abundant cytokinin in Marchantia. We reduced the endogenous cytokinin level by overexpressing the gene for cytokinin oxidase, MpCKX, which inactivates cytokinins, and generated overexpression and knockout lines for type-A (MpRRA) and type-B (MpRRB) response regulators to manipulate the signaling. The overexpression lines of MpCKX and MpRRA, and the knockout lines of MpRRB, shared phenotypes such as inhibition of gemma cup formation, enhanced rhizoid formation and hyponastic thallus growth. Conversely, the knockout lines of MpRRA produced more gemma cups and exhibited epinastic thallus growth. MpRRA expression was elevated by cytokinin treatment and reduced by knocking out MpRRB, suggesting that MpRRA is upregulated by the MpRRB-mediated cytokinin signaling, which is antagonized by MpRRA. Our findings indicate that when plants moved onto land they already deployed the negative feedback loop of cytokinin signaling, which has an indispensable role in organogenesis. | |||||
書誌情報 |
en : Plant and Cell Physiology 発行日 2019-05-28 |
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出版者 | ||||||
出版者 | Oxford University Press | |||||
EISSN/PISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0032-0781 | |||||
PubMed番号 | ||||||
関連タイプ | isVersionOf | |||||
識別子タイプ | PMID | |||||
関連識別子 | 31135032 | |||||
出版者版DOI | ||||||
関連タイプ | isVersionOf | |||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1093/pcp/pcz100 | |||||
権利 | ||||||
権利情報 | c 2019 Oxford University Press | |||||
権利 | ||||||
権利情報 | 出版社許諾条件により、本文は2020年5月28日以降に公開 | |||||
著者版フラグ | ||||||
出版タイプ | AM |