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

0544201 - ÚEB 2022 RIV CH eng J - Journal Article
García-González, Judith - Lacek, Jozef - Retzer, Katarzyna
Dissecting Hierarchies between Light, Sugar and Auxin Action Underpinning Root and Root Hair Growth.
Plants. Roč. 10, č. 1 (2021), č. článku 111. E-ISSN 2223-7747
R&D Projects: GA MŠMT(CZ) EF16_019/0000738; GA ČR(CZ) GJ19-13375Y; GA MŠMT(CZ) EF16_013/0001775
Grant - others:OPPK(XE) CZ.2.16/3.1.00/21519
Institutional support: RVO:61389030
Keywords : cell polarity * arabidopsis * gravitropism * transport * proteins * carrier * signal * plants * 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
OECD category: Biochemistry and molecular biology
Impact factor: 4.658, year: 2021
Method of publishing: Open access
http://doi.org/10.3390/plants10010111

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.
Permanent Link: http://hdl.handle.net/11104/0321321