Assessment of antioxidant and antibacterial properties in two types of Yemeni guava cultivars

Almulaiky, Yaaser Q.; Zeyadi, Mustafa; Saleh, Rashad M.; Baothman, Othman A.; Al-Shawafi, Waleed M.; Al-Talhi, Hasan A.

doi:10.1016/j.bcab.2018.07.025

Cited by 19 publications

(13 citation statements)

References 36 publications

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“…The correlation coefficient (R 2 ) between the phenolic contents and DPPH scavenging activities for leaves, and stem strips and root strips were 0.952, 0.965, and 0.966, respectively, which indicated a strong correlation. The IC 50 values measured for Yemeni guava segments ranged from 19 to 22 μg /mL [40]. ABTS is a basic and frequently utilized technique to assess the activity of cancer prevention agents [41,42].…”

Section: Resultsmentioning

confidence: 99%

In Vitro Assessment of Antioxidant Enzymes, Phenolic Contents and Antioxidant Capacity of the Verdolaga (Portulacaceae)

Almulaiky

Aldhahri

Al‐Abbasi

et al. 2020

IJN

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In this study, the antioxidants and photosynthetic compounds of Verdolaga were examined. Compounds were extracted from distinctive segments of the verdolaga using various solvents such as methanol (40, 60, 80%), ethanol (40, 60, 80%), acetone (40, 60, 80%), and deionized water. The use of 80% methanol led to the highest extracted concentration of phenolic substances and flavonoids. The extracted products (Leaves, Stem strips, and Root strips) were evaluated for their radical scavenging capabilities with DPPH (IC50= 22.26, 20.56, and 32.10), and ABTS (IC50= 2.86, 3.70, and 5.24), reducing power (EC50= 15.70, 16.39, and 21.69), and peroxide scavenging activity (1C50= 1.717, 2.937, and 3.255), respectively. The extracted products were analyzed by a gas chromatography-mass spectrometer. Peroxidase, catalase, and polyphenol oxidase assays were completed for the crude extract of verdolaga’s leave, stem strips, and root strips. As indicated by these tests, extracts of the verdolaga’s roots, stems and leaves using 80% methanol yielded high antioxidant activity. The most elevated concentrations of extracted chlorophyll, lycopene, and carotenoids were from the leaves and the highest concentration of extracted tannin was noted from strips of stems. The highest measures of peroxidase and polyphenol oxidase were identified in root strips and the highest units of catalase was identified in leaves.

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Section: Resultsmentioning

confidence: 99%

In Vitro Assessment of Antioxidant Enzymes, Phenolic Contents and Antioxidant Capacity of the Verdolaga (Portulacaceae)

Almulaiky

Aldhahri

Al‐Abbasi

et al. 2020

IJN

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“…The safety of natural products used in health foods, drug, and cosmetic ingredients is a major concern. Several studies have explored the use of extracts from pulp of guava [21], waste of citrus [6], earthworm [18], oil of Aquilaria crassna [8], and oil from Alpinia zerumbet [22]. We first determined the antioxidant activities of PPEO.…”

Section: Resultsmentioning

confidence: 99%

“…Previous studies have shown that plant EOs have universal antioxidant activities [14]. Meanwhile, it has been reported that terpenes such as limonene, β-myrcene, β-pinene, ocimene, β-copaene, and citral showed anti-oxidant activities [21,23,24]. The strong anti-oxidant activity of PPEOs may be attributable to these components.…”

Section: Resultsmentioning

confidence: 99%

Anti-Oxidant and Anti-Melanogenic Properties of Essential Oil from Peel of Pomelo cv. Guan Xi

Peng

et al. 2019

Molecules

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Here, we investigated the anti-oxidant and anti-melanogenic effects of pomelo peel essential oil (PPEO) from pomelo cv. Guan Xi. The volatile chemical composition of PPEO was analyzed with gas chromatography–mass spectrometry (GC/MS). The most abundant component of PPEO was limonene (55.92%), followed by β-myrcene (31.17%), and β-pinene (3.16%). PPEO showed strong anti-oxidant activities against 2,2-diphenyl-2-picryhydrazyl (DPPH), 2,2′-azinobis-(3-ethylbenzthiazoline-6-sulphonate (ABTS) and superoxide anion free radicals. Based on the B16 melanoma cell system, the effects of PPEO on the viability and morphology of B16 cells and the production of melanin were evaluated. The results revealed that PPEO at concentrations below 50 μg/mL could decrease the melanin content without affecting cell viability and morphology. Intracellular tyrosinase (TYR) activity and Western blot analysis showed that PPEO could down-regulate the expression level of TYR in B16 cells and dose-dependently inhibit TYR activity (by a maximum of 64.54%). In conclusion, PPEO has good anti-oxidant and anti-melanogenic activity, and thus can be widely used as a natural antioxidant in the food, pharmaceutical, and cosmetic industries.

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“…A decoction of GLs at various concentrations (1%, 5%, and 10%) exhibited an inhibitory effect on bacterial colonization and binding of bacterial enterotoxins on epithelial cells, thus altering the inflammatory response. Guava extract showed higher activity of the antioxidant enzymes peroxidase, catalase, and polyphenol oxidase [ 76 ]. Biogenic production of silver nanoparticles (40 nm in size) using GL extract showed antibacterial activity against Pseudomonas aeruginosa owing to high antiradical activity against DPPH radicals and ABTS radical cations [ 77 ].…”

Section: Biological Activities Of Guava Leaf Extractsmentioning

confidence: 99%

Guava (Psidium guajava L.) Leaves: Nutritional Composition, Phytochemical Profile, and Health-Promoting Bioactivities

Kumar

Tomar

Amarowicz

et al. 2021

Foods

125

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Psidium guajava (L.) belongs to the Myrtaceae family and it is an important fruit in tropical areas like India, Indonesia, Pakistan, Bangladesh, and South America. The leaves of the guava plant have been studied for their health benefits which are attributed to their plethora of phytochemicals, such as quercetin, avicularin, apigenin, guaijaverin, kaempferol, hyperin, myricetin, gallic acid, catechin, epicatechin, chlorogenic acid, epigallocatechin gallate, and caffeic acid. Extracts from guava leaves (GLs) have been studied for their biological activities, including anticancer, antidiabetic, antioxidant, antidiarrheal, antimicrobial, lipid-lowering, and hepatoprotection activities. In the present review, we comprehensively present the nutritional profile and phytochemical profile of GLs. Further, various bioactivities of the GL extracts are also discussed critically. Considering the phytochemical profile and beneficial effects of GLs, they can potentially be used as an ingredient in the development of functional foods and pharmaceuticals. More detailed clinical trials need to be conducted to establish the efficacy of the GL extracts.

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Assessment of antioxidant and antibacterial properties in two types of Yemeni guava cultivars

Cited by 19 publications

References 36 publications

In Vitro Assessment of Antioxidant Enzymes, Phenolic Contents and Antioxidant Capacity of the Verdolaga (Portulacaceae)

In Vitro Assessment of Antioxidant Enzymes, Phenolic Contents and Antioxidant Capacity of the Verdolaga (Portulacaceae)

Anti-Oxidant and Anti-Melanogenic Properties of Essential Oil from Peel of Pomelo cv. Guan Xi

Guava (Psidium guajava L.) Leaves: Nutritional Composition, Phytochemical Profile, and Health-Promoting Bioactivities

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