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Xyloglucan Remodeling Defines Auxin-Dependent Differential Tissue Expansion in Plants

Department of Applied Genetics and Cell Biology, University of Natural Resources and Life Sciences Vienna (BOKU), Muthgasse 18, 1190 Vienna, Austria
Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Denmark
Institute of Science and Technology Austria, 3400 Klosterneuburg, Austria
Department of Forest Genetics and Plant Physiology, Umeå Plant Science Centre, Swedish University of Agricultural Sciences, SE-901 87 Umeå, Sweden
Faculty of Biology, Department of Molecular Plant Physiology (MoPP), University of Freiburg, 79104 Freiburg, Germany
Laboratory of Growth Regulators, Faculty of Science, Palacký University and Institute of Experimental Botany, The Czech Academy of Sciences, Šlechtitelů 27, 78371 Olomouc, Czech Republic
Institut Jean-Pierre Bourgin, Institut National de la Recherche Agronomique, AgroParisTech, CNRS, Université Paris-Saclay, RD10, CEDEX, 78026 Versailles, France
Center for Integrative Biological Signalling Studies (CIBSS), University of Freiburg, 79104 Freiburg, Germany
Authors to whom correspondence should be addressed.
Equal contributions.
Current Address: Molecular Plant Pathology, Department of Biointeractions and Crop Protection, Rothamsted Research, Harpenden, Hertfordshire AL5 2JQ, UK.
Academic Editor: Kamil Růžička
Int. J. Mol. Sci. 2021, 22(17), 9222;
Received: 6 August 2021 / Revised: 20 August 2021 / Accepted: 24 August 2021 / Published: 26 August 2021
(This article belongs to the Special Issue Hormonal Regulations of Plant Development)
Size control is a fundamental question in biology, showing incremental complexity in plants, whose cells possess a rigid cell wall. The phytohormone auxin is a vital growth regulator with central importance for differential growth control. Our results indicate that auxin-reliant growth programs affect the molecular complexity of xyloglucans, the major type of cell wall hemicellulose in eudicots. Auxin-dependent induction and repression of growth coincide with reduced and enhanced molecular complexity of xyloglucans, respectively. In agreement with a proposed function in growth control, genetic interference with xyloglucan side decorations distinctly modulates auxin-dependent differential growth rates. Our work proposes that auxin-dependent growth programs have a spatially defined effect on xyloglucan’s molecular structure, which in turn affects cell wall mechanics and specifies differential, gravitropic hypocotyl growth. View Full-Text
Keywords: auxin; growth; cell wall; xyloglucans; hypocotyls; gravitropism auxin; growth; cell wall; xyloglucans; hypocotyls; gravitropism
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MDPI and ACS Style

Velasquez, S.M.; Guo, X.; Gallemi, M.; Aryal, B.; Venhuizen, P.; Barbez, E.; Dünser, K.A.; Darino, M.; Pĕnčík, A.; Novák, O.; Kalyna, M.; Mouille, G.; Benková, E.; P. Bhalerao, R.; Mravec, J.; Kleine-Vehn, J. Xyloglucan Remodeling Defines Auxin-Dependent Differential Tissue Expansion in Plants. Int. J. Mol. Sci. 2021, 22, 9222.

AMA Style

Velasquez SM, Guo X, Gallemi M, Aryal B, Venhuizen P, Barbez E, Dünser KA, Darino M, Pĕnčík A, Novák O, Kalyna M, Mouille G, Benková E, P. Bhalerao R, Mravec J, Kleine-Vehn J. Xyloglucan Remodeling Defines Auxin-Dependent Differential Tissue Expansion in Plants. International Journal of Molecular Sciences. 2021; 22(17):9222.

Chicago/Turabian Style

Velasquez, Silvia M., Xiaoyuan Guo, Marçal Gallemi, Bibek Aryal, Peter Venhuizen, Elke Barbez, Kai A. Dünser, Martin Darino, Aleš Pĕnčík, Ondřej Novák, Maria Kalyna, Gregory Mouille, Eva Benková, Rishikesh P. Bhalerao, Jozef Mravec, and Jürgen Kleine-Vehn. 2021. "Xyloglucan Remodeling Defines Auxin-Dependent Differential Tissue Expansion in Plants" International Journal of Molecular Sciences 22, no. 17: 9222.

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