دورية أكاديمية
أعرض في EDS

Root cap-dependent gravitropic U-turn of maize root requires light-induced auxin biosynthesis via the YUC pathway in the root apex.

التفاصيل البيبلوغرافية
العنوان: Root cap-dependent gravitropic U-turn of maize root requires light-induced auxin biosynthesis via the YUC pathway in the root apex.
المؤلفون: Suzuki H; Department of Biological Sciences, Tokyo Metropolitan University, Tokyo 192-0397, Japan., Yokawa K; Department of Biological Sciences, Tokyo Metropolitan University, Tokyo 192-0397, Japan IZMB, University of Bonn, D-53115 Bonn, Germany., Nakano S; Department of Biological Sciences, Tokyo Metropolitan University, Tokyo 192-0397, Japan., Yoshida Y; Department of Biological Sciences, Tokyo Metropolitan University, Tokyo 192-0397, Japan., Fabrissin I; Department of Biological Sciences, Tokyo Metropolitan University, Tokyo 192-0397, Japan., Okamoto T; Department of Biological Sciences, Tokyo Metropolitan University, Tokyo 192-0397, Japan., Baluška F; IZMB, University of Bonn, D-53115 Bonn, Germany koshiba-tomokazu@tmu.ac.jp baluska@uni-bonn.de., Koshiba T; Department of Biological Sciences, Tokyo Metropolitan University, Tokyo 192-0397, Japan koshiba-tomokazu@tmu.ac.jp baluska@uni-bonn.de.
المصدر: Journal of experimental botany [J Exp Bot] 2016 Aug; Vol. 67 (15), pp. 4581-91. Date of Electronic Publication: 2016 Jun 15.
نوع المنشور: Journal Article; Research Support, Non-U.S. Gov't
اللغة: English
بيانات الدورية: Publisher: Oxford University Press Country of Publication: England NLM ID: 9882906 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1460-2431 (Electronic) Linking ISSN: 00220957 NLM ISO Abbreviation: J Exp Bot Subsets: MEDLINE
أسماء مطبوعة: Original Publication: Oxford, UK : Oxford University Press,
مواضيع طبية MeSH: Gravitropism/*physiology , Indoleacetic Acids/*metabolism , Meristem/*physiology , Plant Growth Regulators/*physiology , Plant Root Cap/*physiology , Zea mays/*physiology, Gene Expression Regulation, Plant/physiology ; Gene Expression Regulation, Plant/radiation effects ; Kynurenine/metabolism ; Kynurenine/physiology ; Light ; Meristem/metabolism ; Metabolic Networks and Pathways/physiology ; Plant Growth Regulators/biosynthesis ; Plant Growth Regulators/metabolism ; Plant Root Cap/metabolism ; Triazoles/metabolism ; Zea mays/metabolism
مستخلص: Gravitropism refers to the growth or movement of plants that is influenced by gravity. Roots exhibit positive gravitropism, and the root cap is thought to be the gravity-sensing site. In some plants, the root cap requires light irradiation for positive gravitropic responses. However, the mechanisms regulating this phenomenon are unknown. We herein report that maize roots exposed to white light continuously for ≥1-2h show increased indole-3-acetic acid (IAA) levels in the root tips, especially in the transition zone (1-3mm from the tip). Treatment with IAA biosynthesis inhibitors yucasin and l-kynurenine prevented any increases in IAA content and root curvature under light conditions. Analyses of the incorporation of a stable isotope label from tryptophan into IAA revealed that some of the IAA in roots was synthesized in the root apex. Furthermore, Zmvt2 and Zmyuc gene transcripts were detected in the root apex. One of the Zmyuc genes (ZM2G141383) was up-regulated by light irradiation in the 0-1mm tip region. Our findings suggest that IAA accumulation in the transition zone is due to light-induced activation of Zmyuc gene expression in the 0-1mm root apex region. Light-induced changes in IAA levels and distributions mediate the maize root gravitropic U-turn.
(© The Author 2016. Published by Oxford University Press on behalf of the Society for Experimental Biology.)
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فهرسة مساهمة: Keywords: Indole-3-acetic acid (IAA) biosynthesis; Zmvt2; Zmyuc.; light dependent; maize; root cap; root gravitropism; yucasin
المشرفين على المادة: 0 (5-(4-chlorophenyl)-4H-1,2,4-triazole-3-thiol)
0 (Indoleacetic Acids)
0 (Plant Growth Regulators)
0 (Triazoles)
343-65-7 (Kynurenine)
6U1S09C61L (indoleacetic acid)
تواريخ الأحداث: Date Created: 20160617 Date Completed: 20171106 Latest Revision: 20181113
رمز التحديث: 20240829
مُعرف محوري في PubMed: PMC4973731
DOI: 10.1093/jxb/erw232
PMID: 27307546
قاعدة البيانات: MEDLINE
الوصف
تدمد:1460-2431
DOI:10.1093/jxb/erw232