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Auxin controls local cytokinin biosynthesis in the nodal stem in apical dominance
http://hdl.handle.net/2237/9188
http://hdl.handle.net/2237/9188b6104c3b-0679-4550-a845-c7f068da5b21
| 名前 / ファイル | ライセンス | アクション |
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mori_fig.pdf (687.7 kB)
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Mori_final.pdf (157.0 kB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2007-12-20 | |||||
| タイトル | ||||||
| タイトル | Auxin controls local cytokinin biosynthesis in the nodal stem in apical dominance | |||||
| 言語 | en | |||||
| 著者 |
Tanaka, Mina
× Tanaka, Mina× Takei, Kentaro× Kojima, Mikiko× Sakakibara, Hitoshi× Mori, Hitoshi× 森, 仁志 |
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| アクセス権 | ||||||
| アクセス権 | open access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||
| 権利 | ||||||
| 言語 | en | |||||
| 権利情報 | The definitive version is available at www.blackwell-synergy.com | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | apical dominance | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | cytokinin biosynthesis | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | IPT | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | auxin | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | axillary bud | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | decapitation | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | In intact plants, the shoot apex grows predominantly and inhibits axillary bud outgrowth. After shoot apex decapitation, axillary bud outgrowth begins. This phenomenon is called apical dominance. Although the involvement of auxin, which represses axillary bud outgrowth, and cytokinin (CK), which promotes axillary bud outgrowth, has been proposed, little is known about the underlying molecular mechanisms. Here, we demonstrate that local CK biosynthesis in the nodal stem is negatively regulated by auxin by controlling expression of the gene pea adenosine phosphate-isopentenyltransferase (PsIPT), which encodes a key enzyme in CK biosynthesis. Before decapitation, PsIPT1 and PsIPT2 transcripts were undetectable; after decapitation, they were markedly induced in the nodal stem along with CK accumulation. PsIPTs expression was repressed by the application of indole-3-acetic acid (IAA). In excised nodal stem, PsIPTs expression and CK levels also increased under IAA-free conditions. Furthermore, β-glucuronidase expression under the control of the PsIPT2 promoter region in transgenic Arabidopsis was repressed by IAA. Our results indicate that, in apical dominance, one role of auxin is to repress local CK biosynthesis in the nodal stem and that, after decapitation, CKs, which are thought to be derived from the roots, are locally biosynthesized in the nodal stem rather than in the roots. | |||||
| 言語 | en | |||||
| 出版者 | ||||||
| 出版者 | Blackwell | |||||
| 言語 | en | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| 出版タイプ | ||||||
| 出版タイプ | AM | |||||
| 出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||
| DOI | ||||||
| 関連タイプ | isVersionOf | |||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | https://doi.org/10.1111/j.1365-313X.2006.02656.x | |||||
| ISSN | ||||||
| 収録物識別子タイプ | PISSN | |||||
| 収録物識別子 | 1365-313X | |||||
| 書誌情報 |
en : The Plant Journal 巻 45, 号 6, p. 1028-1036, 発行日 2006-03 |
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| フォーマット | ||||||
| 値 | application/pdf | |||||
| 著者版フラグ | ||||||
| 値 | author | |||||
| URI | ||||||
| 識別子 | http://hdl.handle.net/2237/9188 | |||||
| 識別子タイプ | HDL | |||||
