Arabidopsis ABCG14 is essential for the root-to-shoot translocation of cytokinin

Donghwi Ko; Joohyun Kang; Takatoshi KibaJiyoung ParkMikiko KojimaJihye DoKyung Yoon KimMi KwonAnne EndlerWon-Yong SongEnrico MartinoiaHitoshi SakakibaraYoungsook Lee

首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Arabidopsis ABCG14 is essential for the root-to-shoot translocation of cytokinin

【24h】

Arabidopsis ABCG14 is essential for the root-to-shoot translocation of cytokinin

机译：Arabidopsis ABCG14 is essential for the root-to-shoot translocation of cytokinin

获取原文

获取原文并翻译 | 示例

掌桥外文数据库（机构版） >>

开具论文收录证明 >>

文献代查 >>

页面导航

摘要
著录项
相关主题

摘要

Cytokinins are phytohormones that induce cytokinesis and are essential for diverse developmental and physiological processes in plants. Cytokinins of the trans-zeatin type are mainly synthesized in root vasculature and transported to the shoot, where they regulate shoot growth. However, the mechanism of long-distance transport of cytokinin was hitherto unknown. Here, we report that the Arabidopsis ATP-binding cassette (ABC) transporter subfamily G14 (AtABCG14) is mainly expressed in roots and plays a major role in delivering cytokinins to the shoot. Loss of AtABCG14 expression resulted in severe shoot growth retardation, which was rescued by exogenous trans-zeatin application. Cytokinin content was decreased in the shoots of atabcg14 plants and increased in the roots, with consistent changes in the expression of cytokinin-responsive genes. Grafting of atabcg14 scions onto wild-type rootstocks restored shoot growth, whereas wild-type scions grafted onto atabcg14 rootstocks exhibited shoot growth retardation similar to that of atabcg14. Cytokinin concentrations in the xylem are reduced by ~90 in the atabcg14 mutant. These results indicate that AtABCG14 is crucial for the translocation of cytokinin to the shoot. Our results provide molecular evidence for the long-distance transport of cytokinin and show that this transport is necessary for normal shoot development.

著录项

来源
《Proceedings of the National Academy of Sciences of the United States of America》 |2014年第19期|7150-7155|共6页
作者
Donghwi Ko; Joohyun Kang; Takatoshi KibaJiyoung ParkMikiko KojimaJihye DoKyung Yoon KimMi KwonAnne EndlerWon-Yong SongEnrico MartinoiaHitoshi SakakibaraYoungsook Lee;
展开▼
作者单位

Plant Productivity Systems Research Group, RIKEN Center for Sustainable Resource Science, Suehiro 1-7-22, Tsurumi, Yokohama 230-0045, Japan;

Pohang University of Science and Technology-Universit?t Zürich (POSTECH-UZH) Global Research Laboratory, Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology, Pohang 790-784, Korea;

Department of Biotechnology, College of Life Science and Biotechnology, Korea University, Seoul 136-713, KoreaInstitut für Pflanzenbiologie, Universit?t Zürich, 8008 Zürich, Switzerland;

展开▼
收录信息美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种英语
中图分类自然科学总论;
关键词
Arabidopsis; essential; translocation;

Arabidopsis ABCG14 is essential for the root-to-shoot translocation of cytokinin

摘要

著录项

相关主题

期刊订阅