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ID 54036
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
Kadota, Isao Department of Chemistry, Graduate School of Natural Science and Technology, Okayama University
本瀬 宏康 自然科学研究科
Takahashi, Taku Department of Biological Science, Graduate School of Natural Science and Technology, Okayama University
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.
備考
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発行日
2016-02-16
出版物タイトル
Scientific Reports
6巻
出版者
Macmillan Publishers Limited.
開始ページ
21487
ISSN
2045-2322
資料タイプ
学術雑誌論文
オフィシャル URL
http\://www.nature.com/srep/
言語
English
OAI-PMH Set
岡山大学
著作権者
© 2016 authors
論文のバージョン
publisher
査読
有り
DOI
PubMed ID
Web of Sience KeyUT