Barton, Craig V M; Duursma, Remko A; Medlyn, Belinda E.; Ellsworth, David S; Eamus, Derek; Tissue, David; Adams, Mark; Conroy, Jann P; Crous, Kristine; Liberloo, Marion; Low, Markus
Rising atmospheric concentrations of CO2 (Ca) can reduce stomatal conductance and transpiration rate in trees, but the magnitude of this effect varies considerably among experiments. The theory of optimal stomatal behaviour predicts that the ratio of photosynthesis to transpiration (instantaneous transpiration efficiency, ITE) should increase in proportion to Ca. We hypothesized that plants regulate stomatal conductance optimally in response to rising Ca. We tested this hypothesis with data...[Show more]
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