Xyloglucan remodeling defines auxin-dependent differential tissue expansion in plants

0551633 - ÚEB 2022 RIV CH eng J - Journal Article
Velasquez, S. M. - Guo, X. - Gallemí, M. - Aryal, B. - Venhuizen, P. - Barbez, E. - Dünser, K. - Darino, M. - Pěnčík, Aleš - Novák, Ondřej - Kalyna, M. - Mouille, G. - Benková, E. - Bhalerao, R. - Mravec, J. - Kleine-Vehn, J.
Xyloglucan remodeling defines auxin-dependent differential tissue expansion in plants.
International Journal of Molecular Sciences. Roč. 22, č. 17 (2021), č. článku 9222. E-ISSN 1422-0067
R&D Projects: GA MŠMT(CZ) EF16_019/0000827
Institutional support: RVO:61389030
Keywords : Auxin * Cell wall * Gravitropism * Growth * Hypocotyls * Xyloglucans
OECD category: Cell biology
Impact factor: 6.208, year: 2021
Method of publishing: Open access
http://doi.org/10.3390/ijms22179222

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 hemi-cellulose 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.
Permanent Link: http://hdl.handle.net/11104/0326873