ID | 54038 |
フルテキストURL | |
著者 |
Yoshimoto, Kaori
Department of Biological Science, Graduate School of Natural Science and Technology, Okayama University
Takamura, Hiroyoshi
Department of Chemistry, Graduate School of Natural Science and Technology, Okayama University
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Kadota, Isao
Department of Chemistry, Graduate School of Natural Science and Technology, Okayama University
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Motose, Hiroyasu
Department of Biological Science, Graduate School of Natural Science and Technology, Okayama University
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Takahashi, Taku
Department of Biological Science, Graduate School of Natural Science and Technology, Okayama University
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抄録 | The xylem conducts water and minerals from the root to the shoot and provides mechanical strength to the plant body. The vascular precursor cells of the procambium differentiate to form continuous vascular strands, from which xylem and phloem cells are generated in the proper spatiotemporal pattern. Procambium formation and xylem differentiation are directed by auxin. In angiosperms, thermospermine, a structural isomer of spermine, suppresses xylem differentiation by limiting auxin signalling. However, the process of auxin-inducible xylem differentiation has not been fully elucidated and remains difficult to manipulate. Here, we found that an antagonist of spermidine can act as an inhibitor of thermospermine biosynthesis and results in excessive xylem differentiation, which is a phenocopy of a thermospermine-deficient mutant acaulis5 in Arabidopsis thaliana. We named this compound xylemin owing to its xylem-inducing effect. Application of a combination of xylemin and thermospermine to wild-type seedlings negates the effect of xylemin, whereas co-treatment with xylemin and a synthetic proauxin, which undergoes hydrolysis to release active auxin, has a synergistic inductive effect on xylem differentiation. Thus, xylemin may serve as a useful transformative chemical tool not only for the study of thermospermine function in various plant species but also for the control of xylem induction and woody biomass production.
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発行日 | 2016-02-16
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出版物タイトル |
Scientific Reports
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巻 | 6巻
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出版者 | Nature Publishing
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開始ページ | 21487
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ISSN | 2045-2322
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資料タイプ |
学術雑誌論文
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言語 |
英語
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OAI-PMH Set |
岡山大学
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論文のバージョン | publisher
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関連URL | isVersionOf https://doi.org/10.1038/srep21487
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ライセンス | http://creativecommons.org/licenses/by/4.0/
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Citation | Yoshimoto K, Takamura H, Kadota I, Motose H, Takahashi T. Chemical control of xylem differentiation by thermospermine, xylemin, and auxin. Sci Rep. 2016;6:21487. Published 2016 Feb 16. doi:10.1038/srep21487
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助成機関名 |
日本学術振興会
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助成番号 | 22370021
23119513
25119715
25440137
26113516
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