Net photosynthesis rate (Pn), stomatal conductance (gs) and transpiration rate (E) of anise hyssop were measured during the four cloudless days, in reference to diurnal fluctuations of leaf temperature (Tleaf), leaf vapor pressure deficit (VPD leaf) and photosynthetic photon flux density (PPFD) in well watered (WW), stressed (S) and recovered (R) plants. An analysis of measured data showed tha...

While increasing temperatures and altered soil moisture arising from climate change in the next 50 years are projected to decrease yield of food crops, elevated CO2 concentration ([CO2]) is predicted to enhance yield and offset these detrimental factors. However, C4 photosynthesis is usually saturated at current [CO2] and theoretically should not be stimulated under elevated [CO2]. Nevertheless...

Leaves are essential in the propagation of roses by cuttings. However, about the underlying principles, there is no unequivocal opinion in the literature. We investigated the hypothesis that current photosynthesis would represent the dominating factor. To validate this hypothesis variations in photosynthesis were created by reducing leaf area, covering of leaves and by reducing CO2 air concentr...

Atmospheric carbon dioxide (CO2) concentration has increased from 280 ppm (parts per million, mole fraction basis) in preindustrial times to 370 ppm today. As concentrations of CO2 and other greenhouse gases rise, global temperature is anticipated to increase. Elevated CO2 will improve crop yields due to increased photosynthesis. However, at above-optimum temperatures for reproductive growth pr...

It has long been recognized that photosynthesis and respiration in the plant cell must be intimately linked, given that they share carbon dioxide and oxygen as substrate and product or as product and substrate, respectively (for review, see Siedow and Day, 2000). While the core reaction schemes of the pathways of photosynthesis, respiration, and the associated process of photorespiration are we...

It has long been recognized that photosynthesis and respiration in the plant cell must be intimately linked, given that they share carbon dioxide and oxygen as substrate and product or as product and substrate, respectively (for review, see Siedow and Day, 2000). While the core reaction schemes of the pathways of photosynthesis, respiration, and the associated process of photorespiration are we...