Global photosynthetic capacity jointly determined by enzyme kinetics and eco-evo-environmental drivers.

ABSTRACT: Accurate understanding of global photosynthetic capacity (i.e. maximum RuBisCO carboxylation rate, V _{c, max}) variability is critical for improved simulations of terrestrial ecosystem photosynthesis metabolisms and carbon cycles with climate change, but a holistic understanding and assessment remains lacking. Here we hypothesized that V _{c, max} was dictated by both factors of temperature-associated enzyme kinetics (capturing instantaneous ecophysiological responses) and the amount of activated RuBisCO (indexed by V _{c, max} standardized at 25 ℃, V _{c, max25}), and compiled a comprehensive global dataset (n = 7339 observations from 428 sites) for hypothesis testing. The photosynthesis data were derived from leaf gas ex

SUBMITTER: Yan Z 

PROVIDER: S-EPMC12848234 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature