Photosynthetic temperature responses in leaves and canopies: why temperature optima may disagree at different scales.

ABSTRACT: Understanding how canopy-scale photosynthesis responds to temperature is of paramount importance for realistic prediction of the likely impact of climate change on forest growth. The effects of temperature on leaf-scale photosynthesis have been extensively documented but data demonstrating the temperature response of canopy-scale photosynthesis are relatively rare, and the mechanisms that determine the response are not well quantified. Here, we compared leaf- and canopy-scale photosynthesis responses to temperature measured in a whole-tree chamber experiment and tested mechanisms that could explain the difference between leaf and crown scale temperature optima for photosynthesis. We hypothesized that (i) there is a large contribution of non-light saturated leaves to total crown photosynthe

SUBMITTER: Kumarathunge DP 

PROVIDER: S-EPMC11585359 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature