Photoperiod does not affect thermal acclimation of shoot-scale gas exchange but is important for shoot development in cuttings of Norway spruce (Picea abies (L.) H. Karst).

ABSTRACT: The growth of boreal trees is expected to benefit from increasing global temperatures through enhanced photosynthetic rates and longer growing seasons. However, since photoperiod is independent of climate change, it may limit the expected growth benefits from a longer growing season and could thus constrain boreal trees' physiological responses to warming. We carried out a growth chamber experiment on 2-year-old Norway spruce (Picea abies) cuttings from two latitudinal origins to investigate the interaction between day length (20/4 h vs 14/10 h light/dark) and enhanced temperatures (25/20 °C vs 15/10 °C day/night) on height growth, bud development and shoot-scale gas exchange. Height growth was greater under longer day length while bud development occurred faster both under longer day leng

SUBMITTER: Fridell A 

PROVIDER: S-EPMC12704415 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature