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During periods of stomatal closure, such as drought, plant leaves continue to lose water at a rate determined by the minimum leaf conductance, gmin. Although gmin varies with temperature, less is known about what drives this variation, including how the pathways of water loss (cuticle or stomata) vary with temperature.
We used gas exchange and benc...
Fig. S2 Comparison of methods for measuring cuticular conductance gcw Fig. S3 Illustration of models for estimation of leaf minimum conductance gmin from bench drying data Fig. S4 Sensitivity of leaf intercellular CO2 concentration, ci, to boundary layer conductance, gbw Fig. S5 Comparison of leaf intercellular CO2 concentration, ci, calculations F...
The temperature dependence of carbon assimilation—from leaf photosynthesis to ecosystem productivity—is hypothesised to be driven by the kinetics of Rubisco‐catalysed carboxylation and electron transport. However, photosynthetic physiology acclimates to changes in temperature, which may decouple temperature dependencies at higher levels of organisa...
Supplementary Information for Acclimation Unifies the Scaling of Carbon Assimilation Across Climate Gradients and Levels of Organisation
Alpine grassland vegetation supports globally important biodiversity and ecosystems that are increasingly threatened by climate warming and other environmental changes. Trait-based approaches can support understanding of vegetation responses to global change drivers and consequences for ecosystem functioning. In six sites along a 1314 m elevational...
Figure S1: Raw data used for determining effects of temperature range, Trange = Tmax-Tmin (°C), on estimates of the apparent activation energy (Fig. 5). Each panel shows simulated data (black points) based on a Sharpe-Schoolfield model with high-temperature inactivation, parameterized with B10 = 1 and mean values (Ea = 0.66 eV, Ei = 1.15 eV, and To...
Rate‐temperature scaling relationships have fascinated biologists for nearly two centuries and are increasingly important in our era of global climate change. These relationships are hypothesized to originate from the temperature‐dependent kinetics of rate‐limiting biochemical reactions of metabolism. Several prominent theories have formalized this...
We present the Fast Assimilation‐Temperature Response (FAsTeR) method, a new method for measuring plant assimilation‐temperature (AT) response that reduces measurement time and increases data density compared with conventional methods.
The FAsTeR method subjects plant leaves to a linearly increasing temperature ramp while taking rapid, nonequilibri...
Leaf traits and climate interact via energy budgets, enabling leaf temperature (Tleaf) to depart from ambient air tempera-ture (Tair). When quantified as the slope β of Tleaf vs. Tair, three types of thermoregulatory behavior are possible: limited homeothermy (β < 1), poikilothermy (β = 1), and megathermy (β > 1). Characterizing thermoregulation ac...
Portable gas exchange analysers provide critical data for understanding plant‐atmosphere carbon and water fluxes, and for parameterising Earth system models that forecast climate change effects and feedbacks.
We characterised temperature measurement errors in the Li‐Cor LI‐6400XT and LI‐6800, and estimated downstream errors in derived quantities, i...
