Diurnal changes in the stomatal, mesophyll, and biochemical limitations of photosynthesis in well-watered greenhouse-grown strawberries

The diurnal variations in the factors of photosynthesis reduction under well-watered greenhouse conditions remain poorly understood. We conducted measurements gas exchange and chlorophyll fluorescence strawberries (Fragaria × ananassa Duch.) for three sunny days. Quantitative limitation analysis was also to investigate photosynthetic limitations [stomatal (SL), mesophyll (MCL), biochemical (BL)]. Under conditions, a observed, respective exhibited different changes based on environmental stress severity. main SL, varying between 11.3 27.1% around midday, whereas MCL BL were 4.3-14.2% 1.7-8.5%, respectively, relatively moderate conditions. However, both SL (11.2-34.2%) (4.8-26.4%) predominantly limited severe suggesting that stomatal closure decline conductance not negligible strong stress, even