Phytochemical Analysis and Antibacterial Activity of Tannins Extracted from Salix alba L. Against Different Gram-Positive and Gram-Negative Bacterial Strains

Javed, Bilal; Nawaz, Khalid; Munazir, Mehmooda

doi:10.1007/s40995-020-00937-w

Cited by 28 publications

(16 citation statements)

References 23 publications

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“…[36][37][38][39] The mechanism of tannin compounds in inhibiting bacterial cells is by denaturing the proteins of the bacterial cells, disrupting the function of the transport system, and synthesis of nucleic acid. 40 Furthermore, the saponins in the seed extract interact with the bacterial cells and affect the permeability of the cell walls to be ruptured. 41,42 Moreover, saponins inhibits the activities of enzymes and disrupt bacterial metabolism.…”

Section: Resultsmentioning

confidence: 99%

Phytochemical Constituents and Antimicrobial Activity of Elaeocarpus sphaericus Schum Seed Extract

2021

TJNPR

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Section: Resultsmentioning

confidence: 99%

Phytochemical Constituents and Antimicrobial Activity of Elaeocarpus sphaericus Schum Seed Extract

2021

TJNPR

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“…Bark extracts of Salix alba were moderately potent against Staphylococcus aureus , with low activity against Escherichia coli [ 43 ]. The antimicrobial potential of Salix alba is correlated to tannin content, with the most effective tannins against Staphylococcus aureus found in bark extracts [ 44 ]. There is no data regarding any bioactive properties of S. retusa ; this study represents the first investigation of the antioxidant and antibacterial potential of this species.…”

Section: Discussionmentioning

confidence: 99%

Exploring New Sources of Bioactive Phenolic Compounds from Western Balkan Mountains

Karalija

Dahija

Demir

et al. 2022

Plants

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This study presents the first report on phenolic composition and bioactivity of ethanolic extracts of three plant species that grow in the western Balkan mountains and are used in traditional folk medicine: Valeriana montana, Salix retusa, and Campanula hercegovina. Phenolics were extracted from different aerial plant parts using 80% ethanol to assess the possibility of sustainable use of these plants as a source of bioactive compounds without disruption to the roots (for V. montana) or destruction of whole habitats (for S. retusa and C. hercegovina). The ethanolic extract of V. montana flower contained noticeable levels of apigenin and quercetin. The branches and bark of S. retusa were significantly rich in catechin, while rutin was the major phenolic found in the leaf extract of C. hercegovina. Furthermore, the flower extract of V. montana revealed the best antioxidant activity, which was comparable to 4-hydroxybenzoic acid and quercetin. Considering antimicrobial activity, the leaf extracts of V. montana and C. hercegovina demonstrated potent activity against all microbes tested, while the extracts of S. retusa were moderately effective. The presented results emphasize the potential of these plants as novel sources of bioactive compounds.

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“…Also, the n-BuOH extract exhibited antibacterial activity against the most tested bacteria. The antibacterial activity of the EtOAc and n-BuOH extracts could be explained by the presence of different phytoconstituents such as flavonoids, tannins, phenolic acids and terpenes which are known for their antibacterial properties (Cueva et al, 2010;Dhayakaran, Neethirajan, Xue, & Shi, 2015;Javed, Nawaz, & Munazir, 2020). Indeed, phenolic compounds can act at two different levels in the cell membrane and the cell wall of microorganisms (Khameneh, Iranshahy, Soheili, & Bazzaz, 2019).…”

Section: Antibacterial Activitymentioning

confidence: 99%

Quantification of total bioactive contents and evaluation of the antioxidant and antibacterial activities of crude extracts from Ephedra altissima Desf.

Bouafia

Mouffouk

Haba

2021

Acta Sci. Biol. Sci.

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The present work describes the in vitro biological activities of the crude extracts (petroleum ether, ethyl acetate and n-butanol) prepared from the species Ephedra altissima Desf. The estimation of total phenolic, flavonoid and tannin contents were carried out using the Folin-Ciocalteu, trichloroaluminum and acidified vanillin methods, respectively. The evaluation of the in vitro antioxidant activities were performed by three different methods namely: scavenging of the free radical ABTS, permanganate reducing antioxidant capacity, and potentiometric assay. In addition, the antibacterial activity was assessed by the agar disk diffusion assay against seven bacterial strains. The results of the phytochemical screening revealed the presence of several types of secondary metabolites. The EtOAc extract exhibited the highest content of phenols (125.62 ± 1.51 μg EGA mg-1 of extract). The greatest flavonoid and tannin contents were observed for n-BuOH extract (19.18 ± 0.39 µg EQ mg-1 of extract and 8.95 ± 1.70 μg EC mg-1 of extract, respectively). Moreover, the EtOAc extract revealed potent antioxidant activity in all the tested methods. Furthermore, the aqueous extract from the species E. altissima showed a good ability to reduce iron III to iron II with a value of 0.68 ± 0.3 moL eq L-1 in potentiometric assay. All the crude extracts (PE, EtOAc and n-BuOH) displayed inhibition of bacterial growth against at least three strains with values of MIC ranging from 3.125 to 50 µg mL-1. Therefore, these results suggest that Ephedra altissima could be used as an important source of natural bioactive compounds with antioxidant and antibacterial properties.

show abstract

Phytochemical Analysis and Antibacterial Activity of Tannins Extracted from Salix alba L. Against Different Gram-Positive and Gram-Negative Bacterial Strains

Cited by 28 publications

References 23 publications

Phytochemical Constituents and Antimicrobial Activity of Elaeocarpus sphaericus Schum Seed Extract

Phytochemical Constituents and Antimicrobial Activity of Elaeocarpus sphaericus Schum Seed Extract

Exploring New Sources of Bioactive Phenolic Compounds from Western Balkan Mountains

Quantification of total bioactive contents and evaluation of the antioxidant and antibacterial activities of crude extracts from Ephedra altissima Desf.

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