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Arabidopsis ABCG14 protein controls the acropetal translocation of root-synthesized cytokinins

Author

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  • Kewei Zhang

    (Brookhaven National Laboratory
    Present address: College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua, Zhejiang 321004, China)

  • Ondrej Novak

    (Laboratory of Growth Regulators, Faculty of Science, Palacký University & Institute of Experimental Botany AS CR)

  • Zhaoyang Wei

    (Brookhaven National Laboratory)

  • Mingyue Gou

    (Brookhaven National Laboratory)

  • Xuebin Zhang

    (Brookhaven National Laboratory)

  • Yong Yu

    (St. John’s University)

  • Huijun Yang

    (Brookhaven National Laboratory)

  • Yuanheng Cai

    (Brookhaven National Laboratory)

  • Miroslav Strnad

    (Laboratory of Growth Regulators, Faculty of Science, Palacký University & Institute of Experimental Botany AS CR
    Centre of the Region Haná for Biotechnological and Agricultural Research, Palacký University)

  • Chang-Jun Liu

    (Brookhaven National Laboratory)

Abstract

Cytokinins are a major group of phytohormones regulating plant growth, development and stress responses. However, in contrast to the well-defined polar transport of auxins, the molecular basis of cytokinin transport is poorly understood. Here we show that an ATP-binding cassette transporter in Arabidopsis, AtABCG14, is essential for the acropetal (root to shoot) translocation of the root-synthesized cytokinins. AtABCG14 is expressed primarily in the pericycle and stelar cells of roots. Knocking out AtABCG14 strongly impairs the translocation of trans-zeatin (tZ)-type cytokinins from roots to shoots, thereby affecting the plant’s growth and development. AtABCG14 localizes to the plasma membrane of transformed cells. In planta feeding of C14 or C13-labelled tZ suggests that it acts as an efflux pump and its presence in the cells directly correlates with the transport of the fed cytokinin. Therefore, AtABCG14 is a transporter likely involved in the long-distance translocation of cytokinins in planta.

Suggested Citation

  • Kewei Zhang & Ondrej Novak & Zhaoyang Wei & Mingyue Gou & Xuebin Zhang & Yong Yu & Huijun Yang & Yuanheng Cai & Miroslav Strnad & Chang-Jun Liu, 2014. "Arabidopsis ABCG14 protein controls the acropetal translocation of root-synthesized cytokinins," Nature Communications, Nature, vol. 5(1), pages 1-12, May.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms4274
    DOI: 10.1038/ncomms4274
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    Cited by:

    1. Jieshun Lin & Yuda Purwana Roswanjaya & Wouter Kohlen & Jens Stougaard & Dugald Reid, 2021. "Nitrate restricts nodule organogenesis through inhibition of cytokinin biosynthesis in Lotus japonicus," Nature Communications, Nature, vol. 12(1), pages 1-12, December.
    2. Pan Liao & Itay Maoz & Meng-Ling Shih & Ji Hee Lee & Xing-Qi Huang & John A. Morgan & Natalia Dudareva, 2023. "Emission of floral volatiles is facilitated by cell-wall non-specific lipid transfer proteins," Nature Communications, Nature, vol. 14(1), pages 1-16, December.

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