Variation in polyphenolic composition and physiological characteristics of 'Blanca de Tudela' cultivar affected by water stress
Globe artichoke (Cynara cardunculus L. var. scolymus (L.) Fiori) is a vegetable native to the Mediterranean region whose consumption has spread throughout the world in recent years. The largest cultivated area is found in the Mediterranean Basin, Italy, Spain, Egypt and France being the main producer countries. Compared with other vegetables, artichoke has a high antioxidant activity that is closely related to its content in phenolic compounds. It is well-known that biotic and abiotic stresses usually elevate the concentration of these compounds. Previous reports revealed that polyphenolic compounds could be affected by cultivar, harvest time, genotype and growth area as well as by drought stress in some seed propagated cultivars. However, there is no literature available about the behaviour of Blanca de Tudela cultivar which represents 80-90% of the total production in Spain. Thus, the objective of this work has been to characterize physiologically, physicochemically and functionally Blanca de Tudela throughout the production cycle, by taking samples of artichokes harvested in autumn, winter and spring and taking into account three different irrigation regimes applied to the crop. The results show that there are differences in phenolic compounds, as well as in the size and appearance of the artichoke heads throughout the production period and depending on the irrigation regimes applied. Flood irrigation regime led to increase in the polyphenol content of artichokes, which was related to the water stress occurring before each irrigation.
Giménez, M.J., Abadía, R., Valero, D., Serrano, M., García-Pastor, M.E., Medina-Santamarina, J., Martínez-Esplá, A. and Zapata, P.J. (2020). Variation in polyphenolic composition and physiological characteristics of 'Blanca de Tudela' cultivar affected by water stress. Acta Hortic. 1284, 235-240
artichoke, phenolic, antioxidant, water stress