ID | 48759 |
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著者 |
Yoshimoto, Kaori
Division of Bioscience; Graduate School of Natural Science and Technology; Okayama University
Noutoshi, Yoshiteru
Research Core for Interdisciplinary Sciences; Okayama University
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Hayashi, Ken-ichiro
Department of Biochemistry; Okayama University of Science
Shirasu, Ken
Plant Science Center; RIKEN
Takahashi, Taku
Division of Bioscience; Graduate School of Natural Science and Technology; Okayama University
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Motose, Hiroyasu
Division of Bioscience; Graduate School of Natural Science and Technology; Okayama University
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抄録 | Thermospermine, a structural isomer of spermine, is synthesized by a thermospermine synthase designated ACAULIS5 (ACL5). Thermospermine-deficient acl5 mutant of Arabidopsis thaliana shows severe dwarfism and excessive xylem differentiation. By screening for compounds that affect xylem differentiation in the acl5 mutant, we identified auxin analogs that remarkably enhanced xylem vessel differentiation in the acl5 mutant but not in the wild type. The xylem-inducing effect of auxin analogs was clearly suppressed by thermospermine, indicating that auxin-inducible xylem differentiation is normally limited by thermospermine. Here, we further characterized xylem-inducing effect of auxin analogs in various organs. Auxin analogs promoted protoxylem differentiation in roots and cotyledons in the acl5 mutant. Our results indicate that the opposite action between thermospermine and auxin in xylem differentiation is common in different organs and also suggest that thermospermine might be required for the suppression of protoxylem differentiation.
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キーワード | 2,4-D
ACAULIS5
auxin
chemical biology
thermospermine
xylem differentiation
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発行日 | 2012-08
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出版物タイトル |
Plant Signaling & Behavior
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巻 | 7巻
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号 | 8号
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開始ページ | 937
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終了ページ | 939
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ISSN | 1559-2316
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資料タイプ |
学術雑誌論文
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オフィシャル URL | http://dx.doi.org/10.4161/psb.20784
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言語 |
英語
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著作権者 | © 2012 Landes Bioscience
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論文のバージョン | author
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査読 |
有り
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