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Open AccessArticle

Dissecting Hierarchies between Light, Sugar and Auxin Action Underpinning Root and Root Hair Growth

1
Laboratory of Hormonal Regulations in Plants, Institute of Experimental Botany, Czech Academy of Sciences, 165 02 Prague, Czech Republic
2
Department of Experimental Plant Biology, Faculty of Science, Charles University, 128 00 Prague, Czech Republic
*
Author to whom correspondence should be addressed.
Those authors contributed equally to this work.
Plants 2021, 10(1), 111; https://doi.org/10.3390/plants10010111
Received: 6 December 2020 / Revised: 1 January 2021 / Accepted: 5 January 2021 / Published: 7 January 2021
(This article belongs to the Special Issue Advances in Auxin Research)
Plant roots are very plastic and can adjust their tissue organization and cell appearance during abiotic stress responses. Previous studies showed that direct root illumination and sugar supplementation mask root growth phenotypes and traits. Sugar and light signaling where further connected to changes in auxin biosynthesis and distribution along the root. Auxin signaling underpins almost all processes involved in the establishment of root traits, including total root length, gravitropic growth, root hair initiation and elongation. Root hair plasticity allows maximized nutrient uptake and therefore plant productivity, and root hair priming and elongation require proper auxin availability. In the presence of sucrose in the growth medium, root hair emergence is partially rescued, but the full potential of root hair elongation is lost. With our work we describe a combinatory study showing to which extent light and sucrose are antagonistically influencing root length, but additively affecting root hair emergence and elongation. Furthermore, we investigated the impact of the loss of PIN-FORMED2, an auxin efflux carrier mediating shootward auxin transporter, on the establishment of root traits in combination with all growth conditions. View Full-Text
Keywords: PIN-FORMED2; shootward auxin transport; root growth; root hair; sugar; sucrose; dark grown roots; light grown roots; root hair elongation; total root length; gravitropic index PIN-FORMED2; shootward auxin transport; root growth; root hair; sugar; sucrose; dark grown roots; light grown roots; root hair elongation; total root length; gravitropic index
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MDPI and ACS Style

García-González, J.; Lacek, J.; Retzer, K. Dissecting Hierarchies between Light, Sugar and Auxin Action Underpinning Root and Root Hair Growth. Plants 2021, 10, 111. https://doi.org/10.3390/plants10010111

AMA Style

García-González J, Lacek J, Retzer K. Dissecting Hierarchies between Light, Sugar and Auxin Action Underpinning Root and Root Hair Growth. Plants. 2021; 10(1):111. https://doi.org/10.3390/plants10010111

Chicago/Turabian Style

García-González, Judith; Lacek, Jozef; Retzer, Katarzyna. 2021. "Dissecting Hierarchies between Light, Sugar and Auxin Action Underpinning Root and Root Hair Growth" Plants 10, no. 1: 111. https://doi.org/10.3390/plants10010111

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