Preharvest Abiotic Stress Affects the Nutritional Value of Lettuce

Lettuce (Lactuca sativa L.) is one of the most consumed leafy green vegetables in world, and a good source important bioactive compounds. However, environmental stress factors, such as salinity or drought, cause physiological biochemical changes plants influence yields levels both primary secondary metabolites, which drastically nutritional value quality crop. In present work, six typical Czech cultivars/landraces various lettuce morphotypes (Altenbursky, Dubacek, Kamenac, Jupiter, Prazan, Robin) were grown under driven conditions then analyzed for content sugars, fatty acids, amino phenolics, vitamins. Obtained data subjected to compositional tables statistical analysis, provided not only information on general trends their but also how these affected each particular variety. Overall, drought caused largest relative increase phenolic compounds some acids. Conversely, overall decrease vitamin C, addition, salt larger many especially acid arginine, while acids slightly increased, together with E. interpretation from analysis showed that varieties Prazan Altenbursky had least chemical composition when stress. Again, var. variability comparison other These findings confirm fact landraces old cultivars do change profiles significantly, case improved cultivars, they emphasize need cultivation raising productivity staple food crops.