Castro, David
- Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences
Abstract
The circadian oscillator is an innate timing mechanism present in most organisms, including plants. In this study, Populus tremula × P. tremuloides (Populus) trees with reduced expression of circadian clock components were exposed to gradually increases in the osmotic and ionic components of salt stress. Reduced levels of the morning components PttLATE ELONGATED HYPOCOTYL 1 and 2 (PttLHY1,2) or of the evening components PttPSEUDO-RESPONSE REGULATOR 7a and b (PttPRR7a,b) and PttGIGANTEA1,2 (PttGI1,2) affected growth adaptation under stress conditions. PttLHY1,2 regulated growth under NaCl treatment via the control of PttCyclin D3 expression. PttPRR7a,b and PttGI1,2 were instrumental in maintaining growth in roots by enabling effective adaptation of the metabolome. Major changes in the root metabolome under prolonged stress included alterations in carbohydrate, amino acids, and fatty acids. This study places the circadian clock at the centre of adaptation to adverse conditions in trees and will help the development of stress-resistant trees.
Published in
npj biological timing and sleep
2025, volume: 2, article number: 34
SLU Authors
Pin, Pierre
- Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences
- Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences
Nilsson, Ove
- Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences
- Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences
UKÄ Subject classification
Botany
Developmental Biology
Publication identifier
- DOI: https://doi.org/10.1038/s44323-025-00052-2
Permanent link to this page (URI)
https://res.slu.se/id/publ/145075