Effects of nutrient deficiency and abiotic environmental stresses on yield, phenolic compounds and antiradical activity in lettuce (Lactuca sativa L.)

Macronutrient deprivation eustress elicits differential secondary metabolites in red and green‐pigmented butterhead lettuce grown in a closed soilless system

“…Certain studies in controlled environments focused on nitrogen levels only, such as Quadir et al . and Becker et al ., or on nitrogen and phosphorus levels, such as Galieni et al . Nevertheless, nothing is known about the interaction between macronutrient deprivation, in the form of reduced macronutrient levels in the nutrient solution, and cultivar, in respect to lettuce PSM profiles.…”

“…Previous studies [17][18][19][20] have demonstrated the effect of reduced nutrient solution levels on yield and particular quality traits of greenhouse leafy vegetables, including lettuce. Certain studies in controlled environments focused on nitrogen levels only, such as Quadir et al 21 and Becker et al, 22 or on nitrogen and phosphorus levels, such as Galieni et al 23 Nevertheless, nothing is known about the interaction between macronutrient deprivation, in the form of reduced macronutrient levels in the nutrient solution, and cultivar, in respect to lettuce PSM profiles.…”

Remediated marine sediment as growing medium for lettuce production: assessment of agronomic performance and food safety in a pilot experiment

“…Lettuce was chosen as being one of the most pollutant‐sensitive crops, whose growth can be compromised even in moderately polluted or remediated soils . Besides, lettuce is a good source of various bioactive compounds and provides considerable amounts of several minerals, which are susceptible to high variations in response to growing conditions and environmental stress . For this reason, the main nutritional quality parameters (minerals, sugars, organic acids and antioxidants compounds) of lettuce cultivated in remediated sediment were evaluated in comparison with those of lettuce grown in a peat‐based medium.…”

“…10,11 Besides, lettuce is a good source of various bioactive compounds and provides considerable amounts of several minerals, 12 which are susceptible to high variations in response to growing conditions and environmental stress. 13 For this reason, the main nutritional quality parameters (minerals, sugars, organic acids and antioxidants compounds) of lettuce cultivated in remediated sediment were evaluated in comparison with those of lettuce grown in a peat-based medium. Furthermore, considering that the cultivation of vegetables in reclaimed sediments raises food safety concerns owing to possible contaminant accumulation in the edible products, attention was paid to the toxicological impact that would result from the consumption of sediment-grown lettuce.…”

Shading and nitrogen management affect quality, safety and yield of greenhouse-grown leaf lettuce

“…conditiva Alef. storage roots (Stagnari et al, 2014) and in lettuce leaves (Galieni et al, 2015) are reduced as well as the anthocyanin concentrations in red lettuce (Kleinhenz et al, 2003). Radiation also acts through the enhancement of nitrate reductase activity, thus decreasing nitrate content in plants (Lillo, 1994).…”