Flexure wood formation via growth reprogramming in hybrid aspen involves jasmonates and polyamines and transcriptional changes resembling tension wood development

0578498 - ÚEB 2024 RIV GB eng J - Journal Article
Urbancsok, J. - Donev, E. N. - Sivan, P. - van Zalen, E. - Barbut, F. R. - Derba-Maceluch, M. - Šimura, J. - Yassin, Z. - Gandla, M. L. - Karady, Michal - Ljung, K. - Winestrand, S. - Jönsson, K. I. - Scheepers, G. - Delhomme, N. - Street, N. R. - Mellerowicz, E. J.
Flexure wood formation via growth reprogramming in hybrid aspen involves jasmonates and polyamines and transcriptional changes resembling tension wood development.
New Phytologist. Roč. 240, č. 6 (2023), s. 2312-2334. ISSN 0028-646X. E-ISSN 1469-8137
Institutional support: RVO:61389030
Keywords : flexure wood * jasmonic acid signaling * mechanostimulation * polyamines * Populus tremula × tremuloides * saccharification * thigmomorphogenesis * wood development
OECD category: Plant sciences, botany
Impact factor: 9.4, year: 2022
Method of publishing: Open access
https://doi.org/10.1111/nph.19307

Stem bending in trees induces flexure wood but its properties and development are poorly understood. Here, we investigated the effects of low-intensity multidirectional stem flexing on growth and wood properties of hybrid aspen, and on its transcriptomic and hormonal responses. Glasshouse-grown trees were either kept stationary or subjected to several daily shakes for 5 wk, after which the transcriptomes and hormones were analyzed in the cambial region and developing wood tissues, and the wood properties were analyzed by physical, chemical and microscopy techniques. Shaking increased primary and secondary growth and altered wood differentiation by stimulating gelatinous-fiber formation, reducing secondary wall thickness, changing matrix polysaccharides and increasing cellulose, G- and H-lignin contents, cell wall porosity and saccharification yields. Wood-forming tissues exhibited elevated jasmonate, polyamine, ethylene and brassinosteroids and reduced abscisic acid and gibberellin signaling. Transcriptional responses resembled those during tension wood formation but not opposite wood formation and revealed several thigmomorphogenesis-related genes as well as novel gene networks including FLA and XTH genes encoding plasma membrane-bound proteins. Low-intensity stem flexing stimulates growth and induces wood having improved biorefinery properties through molecular and hormonal pathways similar to thigmomorphogenesis in herbaceous plants and largely overlapping with the tension wood program of hardwoods.
Permanent Link: https://hdl.handle.net/11104/0347489