Bioactive compounds and antioxidant activity of crisphead lettuce (Lactuca sativa L.) of three different cultivation systems

Abstract

Lettuce is a vegetable most consumed and produced on a large scale in the world, it deserves special attention for its nutritional and functional value. Cultivated in the conventional, hydroponic and organic method, it presents different characteristics in production, which may influence the composition of this vegetable. It is indisputable that regular consumption of vegetables is beneficial due to the presence of bioactive compounds with antioxidant properties that protect and promote human health. In this study, the total phenolic compound, flavonoid, and tannin contents, as well as the antioxidant activities of lettuce samples from conventional, hydroponic, and conventional cultivars were analyzed. An extract was prepared using 80% acetone. The contents of total phenolic compounds, flavonoids, and tannins were determined. The antioxidant activity was determined by the radical capture method using DPPH. It was observed that the organic cultivation system had the highest values of ash, protein, total phenolic compounds, flavonoids and antioxidant activity, followed by the hydroponic system. The organic system presented greater protein content and higher content of bioactive compounds, justifying the high antioxidant activity. Therefore, the organic farming system favors the highest concentration in the content of bioactive compounds and antioxidant activity.

Quality and Nutritional Parameters of Food in Agri-Food Production Systems

“…Higher values of ash, protein, total phenolic compounds and flavonoids, and antioxidant activity, in org [83] Sweet pepper Higher content of sugar, ascorbic acid and yellow carotenoids, and Folin-Ciocalteu index, in org [84] Sweet bell pepper More flavonoids, including myricetin, quercetin, kaempferol, apigenin and carotenoids such as beta-carotene, alpha-carotene, capsorubin and cryptoflavin in org [85] Chili fruits Higher ascorbic acid and capsaicinoid content in org [86] Foxtail millet Higher fructose and glucose content in org [87] Rice No significant differences found for K, Cu, Zn, Rb, Mo or Cd in org [88] Rice and wheat Lower protein, essential amino acid and heavy metal (Cr, As, Cd and Cu) content, but higher flavonoids in both org rice and wheat [30] Winter wheat Lower protein content and levels of Ca, Mn and Fe, as well as toxic elements (i.e., Al, As, Cd and Pb), but higher levels of K, Zn, Mo and quality proteins in org wheat flours [89] Winter wheat and spring wheat…”

Ameliorative effects of phosphorylated peptide from Antarctic krill (Euphausia superba) against H2O2-induced damage in MC3T3-E1 cells

“…DPPH• scavenging activity: 1 mL of peptide sample was mixed with 2 mL of DPPH solution (150 μM in ethanol) followed by standing room temperature for 20 min in the dark. The absorbance was measured at 517 nm, using GSH as a positive control (Negrão et al, 2020).…”

CLDN18-ARHGAP26 function in gastric cancer and be a new therapeutic target by ABCG2 and ABCB1 pathway

“…The majority of family members harbor various biological functions, including promoting cell proliferation and differentiation, inhibiting cell apoptosis and intercellular interactions, which exert regulatory effects on critical biological and pathological process (Hashimoto et al, 2019;Ismail et al, 2020;Li et al, 2020;Negrão et al, 2021). The migration, proliferation and differentiation of lumen morphology would lead to the angiogenesis of tumor (Balthazar et al, 2021;Hu et al, 2021;Khan et al, 2021).…”