Aro, Tuuli
- Institutionen för skoglig genetik och växtfysiologi, Sveriges lantbruksuniversitet
Sammanfattning
Plants in northern latitudes are well adapted to low temperatures, yet anthropogenic climate change increases the risk of frost and cold soil events, exposing non-acclimated tissues to novel stress conditions. This thesis investigates transcriptional responses to low temperature in boreal tree species and evaluates the genomic selection models to enhance spring frost tolerance in Norway spruce. The results show that plant tissues, as well as different species, exhibit distinct low temperature responses, with roots facing a potential trade-off between sustaining growth and activating stress responses. This thesis also demonstrates that genomic prediction models incorporating bud burst as an assisting trait show great potential for predicting spring frost tolerance in Norway spruce. These findings provide new insight into the molecular regulation of cold stress in boreal trees and identify fine roots as particularly vulnerable to low soil temperatures, potentially impairing whole-tree growth in the future. Results underscore the need for further research on species-level root responses to cold, while also emphasizing genomic selection as a promising approach to enhance tree resilience under climate change.
Nyckelord
transcriptomics; Arabidopsis; Picea abies; Scots pine; silver birch; aspen; needle; CBF; co-expression network; needle; transkription, Arabidopsis, Picea abies, tall, björk, asp, barr, CBF
Publicerad i
Acta Universitatis Agriculturae Sueciae
2025, nummer: 2025:72
Utgivare: Swedish University of Agricultural Sciences
SLU författare
UKÄ forskningsämne
Skogsvetenskap
Publikationens identifierare
- DOI: https://doi.org/10.54612/a.78cggn0q0h
- ISBN: 978-91-8124-056-6
- eISBN: 978-91-8124-102-0
Permanent länk till denna sida (URI)
https://res.slu.se/id/publ/142473