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The effect of leaf temperature on gas exchange. Net photosynthesis (A), transpiration (B), stomatal conductance (C) and internal CO2 concentration (D) of Semillon leaves (mean ± SE, N > 1000; see Table 1) measured over the whole growing season and averaged across all leaves, shoots and vines. These data were separated into the different leaf temperatures from 20 to 45 °C in ±2.5 °C bands and then analysed into least squares means using SAS 9.13.
