We studied growth and photosynthesis of cucumber (Cucumis sativus) seedlings under two vapor-pressure deficit levels (VPD; 0.4 and 3.0 kPa), two salinity levels (0 mM and 34 mM NaCl), and two CO2 concentrations ([CO2]; 400 and 1,000 μmol mol-1). Relative growth rate (RGR) decreased with increasing VPD, but the causal factor differed between salinity levels and CO2 concentrations. Under ambient [CO2], RGR decreased with increasing VPD at low salinity mainly due to decreased leaf area ratio (LAR), and decreased net assimilation rate (NAR) at high salinity. The decrease in intercellular [CO2] (Ci) with decreasing stomatal conductance caused by high VPD did not significantly limit net photosynthetic rate (PN) at low salinity, but PN was potentially limited by Ci at high salinity. At high [CO2], high VPD reduced LAR, but did not affect NAR. This is because the decrease in Ci occurred where slope of PN-Ci curve was almost flat., T. Shibuya, K. Kano, R. Endo, Y. Kitaya., and Obsahuje bibliografii
The article deals with the comparison of humidity measuring instrument calibration evaluation carried out in two climatic chambers under predetermined conditions. The approach of measuring instrument calibration evaluation, including measurement uncertainties, with consideration of confidence, is shown on specific example of measurement in climatic chamber. The article is focused on the compare of two calibrations evaluation. and Príspevok sa zaoberá porovnaním vyhodnotenia kalibrácie meradla vlhkosti vykonaných v dvoch klimatických komorách za vopred stanovených podmienok. Na konkrétnom príklade merania v klimatickej komore je ukázaný prístup vyhodnotenia kalibrácie meradla vrátane neistôt merania s uvažovaním spoľahlivosti. Príspevok porovnáva vyhodnotenie dvoch kalibrácií.