Total polyphenol and flavonoid contents and antioxidant activities of water lettuce (Pistia stratiotes) leave extracts

Sudirman, S. and Herpandi and Safitri, E. and Apriani, E. F. and Taqwa, F. H. (2022) Total polyphenol and flavonoid contents and antioxidant activities of water lettuce (Pistia stratiotes) leave extracts. Food Research (Malaysia), 6 (4). pp. 205-210. ISSN 2550-2166

Free radicals such as reactive oxygen species and reactive nitrogen species are involved in the development of various chronic diseases. Under oxidative stress conditions, the human body needs more antioxidants that can be externally obtained from foods or supplements. This study aimed to investigate the total polyphenol content and flavonoid compounds and antioxidant activities of 70% ethanol and water extracts of water lettuce (Pistia stratiotes). The dried water lettuce was extracted by maceration. The yield of total polyphenol content of 70% ethanol extract (238.36±28.51 mg gallic acid equivalent (GAE)/g of dry sample) was higher than water extract (70.66±29.43 mg GEA/g of dry sample). The 70% ethanol extract (209.65±7.71 mg quercetin equivalent (QE)/g of dry sample) also possesses a higher level of flavonoid content compared to water extract (140.98±1.68 mg QE/g of dry sample). As analyzed by 2,2-diphenyl-1-picrylhydrazyl (DPPH) and ferric reducing antioxidant power (FRAP) methods, 70% ethanol extract exhibited more powerful antioxidant activities compared to water extract. The half-maximum inhibitory concentration (IC50) of 70% ethanol and water extracts were about 459.08±25.38 µg/mL and 1086.44±186.53 µg/mL, respectively and the ferric reduction power was about 118.43±2.17 mM Fe2+ equivalent/g of dry sample and 71.76±0.45 mM Fe2+ equivalent/g of dry sample, respectively. Based on these results, it is understood that 70% ethanol extract is the potential source of an antioxidant agent.

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Abstract

Free radicals such as reactive oxygen species and reactive nitrogen species are involved in the development of various chronic diseases. Under oxidative stress conditions, the human body needs more antioxidants that can be externally obtained from foods or supplements. This study aimed to investigate the total polyphenol content and flavonoid compounds and antioxidant activities of 70% ethanol and water extracts of water lettuce (Pistia stratiotes). The dried water lettuce was extracted by maceration. The yield of total polyphenol content of 70% ethanol extract (238.36±28.51 mg gallic acid equivalent (GAE)/g of dry sample) was higher than water extract (70.66±29.43 mg GEA/g of dry sample). The 70% ethanol extract (209.65±7.71 mg quercetin equivalent (QE)/g of dry sample) also possesses a higher level of flavonoid content compared to water extract (140.98±1.68 mg QE/g of dry sample). As analyzed by 2,2-diphenyl-1-picrylhydrazyl (DPPH) and ferric reducing antioxidant power (FRAP) methods, 70% ethanol extract exhibited more powerful antioxidant activities compared to water extract. The half-maximum inhibitory concentration (IC50) of 70% ethanol and water extracts were about 459.08±25.38 µg/mL and 1086.44±186.53 µg/mL, respectively and the ferric reduction power was about 118.43±2.17 mM Fe2+ equivalent/g of dry sample and 71.76±0.45 mM Fe2+ equivalent/g of dry sample, respectively. Based on these results, it is understood that 70% ethanol extract is the potential source of an antioxidant agent.

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Item Type:	Article
AGROVOC Term:	Pistia stratiotes
AGROVOC Term:	polyphenols
AGROVOC Term:	flavonoids
AGROVOC Term:	leaf extracts
AGROVOC Term:	experimentation
AGROVOC Term:	extraction
AGROVOC Term:	data analysis
AGROVOC Term:	biochemists
AGROVOC Term:	bioactive compounds
AGROVOC Term:	food supplements
Geographical Term:	Indonesia
Uncontrolled Keywords:	Antioxidants
Depositing User:	Ms. Azariah Hashim
Date Deposited:	01 Nov 2024 03:56
Last Modified:	01 Nov 2024 03:56
URI:	http://webagris.upm.edu.my/id/eprint/664

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