Evidence for widespread thermal acclimation of canopy photosynthesis.

ABSTRACT: Plants acclimate to temperature by adjusting their photosynthetic capacity over weeks to months. However, most evidence for photosynthetic acclimation derives from leaf-scale experiments. Here we address the scarcity of evidence for canopy-scale photosynthetic acclimation by examining the correlation between maximum photosynthetic rates (A_max,2,000) and growth temperature ( Tair¯ ) across a range of concurrent temperatures and canopy foliage quantity, using data from >200 eddy covariance sites. We detect widespread thermal acclimation of canopy-scale photosynthesis, demonstrated by enhanced A_max,2,000 under higher Tair¯ , across flux sites with adequate water availability. A 14-day period is identified as the most relevant timescale for acclimation across all sites, w

SUBMITTER: Liu J 

PROVIDER: S-EPMC11649563 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature