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Updated: Jan 20, 2026

Improved UPLC-UV Method for the Quantification of Vitamin C in Lettuce Varieties Lactuca sativa L. and Crop Wild Relatives Lactuca spp.
Published on: June 30, 2020
Quality of lettuce Lactuca sativa (var. Tropicana M1) grown with two low-salinity shrimp effluents
Humberto Ramos-Sotelo1, Ángel Valdez-Ortiz1, Lourdes J Germán-Báez1
1Programa Regional de Posgrado en Biotecnología, Universidad Autónoma de Sinaloa, Culiacán, Sinaloa 80030, Mexico.
Abstract:
In a previous study, we investigated the use of shrimp effluents from well water (WW) and diluted seawater (DSW) (both with 2.7 dS m-1 electrical conductivity (EC)), and a hydroponic solution (HS) as the control treatment in greenhouse lettuce production. This new paper completes the previous one by focusing on the quality of lettuce harvested. Compared to the lettuce from the other treatments, WW-lettuce exhibited higher levels of phenolic compounds and a higher antioxidant capacity, mainly in the soluble fraction. The lettuce cultivated with DSW showed no significant difference in total phenolics and flavonoids with respect to the HS lettuce. These results reveal that the functional properties (antioxidant properties, polyphenols and flavonoid content) are even better in the lettuce produced with WW and DSW shrimp effluents. In contrast, agronomical properties (weight, number of leaves and yield) were found to be better in the case of lettuce grown with the hydroponic solution (control).
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