Data from: Canopy carbon- and water-use efficiencies in response to temperature and water deficit for wheat

This dataset contains daily records of canopy gas exchange and nitrogen dynamics during the post-anthesis period in five wheat genotypes grown under a total of 31 contrasting temperature and water regimes across 8 independent experiments conducted in semi-controlled conditions under natural sunlight at INRAE, France. The objective of this study was to examine canopy carbon and water fluxes as well as carbon use efficiency (CUE) and water use efficiency (WUE) under varying environmental conditions. The detailed experimental treatments and the details of sampling and data collection can be found at Materials and Method section of the publication. Briefly, Daytime and nighttime were defined as between 4:00 h and 20:00 h solar time (16 h) and between 20:00 h and 4:00 h solar time (8 h), respectively. Based on this distinction, we calculated daytime global radiation (RG; MJ/m2/d), daytime mean air temperature (Tday; °C), nighttime mean air temperature (Tnight; °C), daily mean air temperature (Tdaily; °C), daily integral nighttime crop respiration (RCnight.daily; mol/m2/d), daily integral daytime crop respiration (RCday.daily; mol/m2/d) using the Kok method, daily integral net canopy CO2 assimilation (ACnet.daily; mol/m2/d), and daily integral evapotranspiration (mm/d). During the measurement period, canopy leaves were also sampled to determine Canopy leaf nitrogen mass on a ground area basis (NC.leaf; g/m2) using the Kjeldahl digestion method with a Kjeltec 2300 analyzer (Foss Tecator AB, Hoeganaes, Sweden). Daily volumetric soil water content (SWC; %) was continuously monitored by a water balance method based on evapotranspiration measurements. Missing values (~2% of total daily data) were linearly interpolated when calculating gas exchange variables over a period of several days.