このエントリーをはてなブックマークに追加
ID 48759
フルテキストURL
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 科研費研究者番号
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
Motose, Hiroyasu Division of Bioscience; Graduate School of Natural Science and Technology; Okayama University
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.
キーワード
2,4-D
ACAULIS5
auxin
chemical biology
thermospermine
xylem differentiation
発行日
2012-08
出版物タイトル
Plant Signaling & Behavior
7巻
8号
開始ページ
937
終了ページ
939
ISSN
1559-2316
資料タイプ
学術雑誌論文
オフィシャル URL
http://dx.doi.org/10.4161/psb.20784
言語
English
著作権者
© 2012 Landes Bioscience
論文のバージョン
author
査読
有り
DOI
PubMed ID