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The Whats, the Wheres and the Hows of strigolactone action in the roots

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Abstract

Main conclusion

Strigolactones control various aspects of plant development, including root architecture. Here, we review how strigolactones act in the root and survey the strigolactone specificity of signaling components that affect root development.

Strigolactones are a group of secondary metabolites produced in plants that have been assigned multiple roles, of which the most recent is hormonal activity. Over the last decade, these compounds have been shown to regulate various aspects of plant development, such as shoot branching and leaf senescence, but a growing body of literature suggests that these hormones play an equally important role in the root. In this review, we present all known root phenotypes linked to strigolactones. We examine the expression and presence of the main players in biosynthesis and signaling of these hormones and bring together the available information that allows us to explain how strigolactones act to modulate the root system architecture.

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Abbreviations

D:

DWARF

KAI:

KARRIKIN INSENSITIVE

LR:

Lateral root

LRD:

Lateral root density

MAX:

MORE AXILLARY GROWTH

PIN:

PIN-FORMED

rac-GR24:

RACEMIC GR24

SCF:

Skp, Cullin, F-box

SL:

Strigolactone

SMAX1:

SUPPRESSOR OF MAX2 1

SMXL:

SUPPRESSOR OF MAX2 1 LIKE

TIR1:

TRANSPORT INHIBITOR RESPONSE1

WT:

Wild type

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Acknowledgments

We thank Martine De Cock for help with the manuscript. This work was supported by Ghent University Hercules program for the UPLC-Synapt Q-Tof HDMS system (Grant No. AUGE/014) and European Cooperation on Science and Technology (COST action FA1206). C.M. and A.W. are the recipients of a predoctoral fellowship from the “Bijzonder Onderzoeksfonds” of the Ghent University and of a VIB International PhD program fellowship, respectively. E.S. is a Postdoctoral Fellow of the Research Foundation-Flanders.

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    Authors and Affiliations

    1. Department of Plant Systems Biology, VIB, Technologiepark 927, 9052, Ghent, Belgium

      Cedrick Matthys, Alan Walton, Sylwia Struk, Elisabeth Stes & Sofie Goormachtig

    2. Department of Plant Biotechnology and Bioinformatics, Ghent University, Technologiepark 927, 9052, Ghent, Belgium

      Cedrick Matthys, Alan Walton, Sylwia Struk, Elisabeth Stes & Sofie Goormachtig

    3. Department of Medical Protein Research, VIB, Albert Baertsoenkaai 3, 9000, Ghent, Belgium

      Alan Walton, Elisabeth Stes & Kris Gevaert

    4. Department of Biochemistry, Ghent University, Albert Baertsoenkaai 3, 9000, Ghent, Belgium

      Alan Walton, Elisabeth Stes & Kris Gevaert

    5. Institut Jean-Pierre Bourgin, Unité Mixte de Recherche 1318, Institut National de la Recherche Agronomique-AgroParisTech, 78026, Versailles Cedex, France

      François-Didier Boyer

    6. Centre de Recherche de Gif, Institut de Chimie des Substances Naturelles, Unité Propre de Recherche 2301, Centre National de la Recherche Scientifique, 91198, Gif‐Sur‐Yvette, France

      François-Didier Boyer

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    Correspondence to Sofie Goormachtig.

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    C. Matthys and A. Walton contributed equally to this work.

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    Matthys, C., Walton, A., Struk, S. et al. The Whats, the Wheres and the Hows of strigolactone action in the roots. Planta 243, 1327–1337 (2016). https://doi.org/10.1007/s00425-016-2483-9

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    • DOI: https://doi.org/10.1007/s00425-016-2483-9

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