Statistical data.

The df and P values from the photosynthetic pathway and the plant functional type differences in the maximum leaf net CO2 assimilation rate (Amax, μmol m-2 s-1), the mean leaf net CO2 assimilation rate (Mean A, μmol m-2 s-1), maximum stomatal conductance (gsmax, mol m-2 s-1), mean ratio of leaf internal to ambient CO2 concentration (Mean Ci/Ca), nighttime mean respiration rate (Mean R, μmol m-2 s-1), magnitude of nocturnal shift in δ13CR (Variation in δ13CR), and respiratory apparent 13C/12C fractionation (‰) comparative to biomass (ΔR, biomass), soluble carbohydrates (ΔR, sugar), starch (ΔR, starch) and lipids (ΔR, lipid) at 8 pm and 4 am, respectively.