2021
DOI: 10.1155/2021/9985325
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Chemical Composition and Antimicrobial Activity of Two Sri Lankan Lichens, Parmotrema rampoddense, and Parmotrema tinctorum against Methicillin-Sensitive and Methicillin-Resistant Staphylococcus aureus

Abstract: Introduction. Medicinal utility of lichens is ascribed to the presence of various secondary metabolites of low molecular weight and they have been used in traditional medicine including Ayurveda in the treatment of wounds and skin disorders. Despite the urgent need to effectively address the antibiotic resistance worldwide, the discovery of new antibacterial drugs has declined in the recent past. This emphasizes the increasing importance of investigating and developing new classes of antibiotics that can withs… Show more

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Cited by 5 publications
(5 citation statements)
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References 39 publications
(65 reference statements)
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“…A qualitative analysis of two Sri Lankan extracts from the lichens Parmotrema tinctorum and Parmotrema rampoddense revealed the presence of saponins, flavonoids, and polyphenols [44]. Anthracene glycosides were present in P. tinctorum but not in P. rampoddense, whereas proteins, alkaloids, tannins, reducing sugars, cyanogenic glycosides, and cardenolide glycosides were absent from both lichen extracts [44]. The presence of phenols and alkaloids with strong bioactivities is also in agreement with the published literature [17,45,46].…”
Section: Lichenochemical Analysissupporting
confidence: 53%
See 1 more Smart Citation
“…A qualitative analysis of two Sri Lankan extracts from the lichens Parmotrema tinctorum and Parmotrema rampoddense revealed the presence of saponins, flavonoids, and polyphenols [44]. Anthracene glycosides were present in P. tinctorum but not in P. rampoddense, whereas proteins, alkaloids, tannins, reducing sugars, cyanogenic glycosides, and cardenolide glycosides were absent from both lichen extracts [44]. The presence of phenols and alkaloids with strong bioactivities is also in agreement with the published literature [17,45,46].…”
Section: Lichenochemical Analysissupporting
confidence: 53%
“…Lichenochemical screening studies on the crude extract of U. muhlenbergii revealed the presence of alkaloids and phenols as major components, with tannins, saponins, and hydrocarbons present in smaller quantities, whereas flavonoids, terpenoids, proteins, and glycosides were not detected (data not shown). A qualitative analysis of two Sri Lankan extracts from the lichens Parmotrema tinctorum and Parmotrema rampoddense revealed the presence of saponins, flavonoids, and polyphenols [44]. Anthracene glycosides were present in P. tinctorum but not in P. rampoddense, whereas proteins, alkaloids, tannins, reducing sugars, cyanogenic glycosides, and cardenolide glycosides were absent from both lichen extracts [44].…”
Section: Lichenochemical Analysismentioning
confidence: 99%
“…Considering the data registered in Table 5 , we calculated the antibacterial activity index (AI), reporting the IZD values (mm) of lichen extracts to the ones of the standard antibiotic drugs [ 47 ]. It can be noted that dry and fluid U. barbata acetone and ethanol extracts had similar inhibitory effects ( Table 6 ).…”
Section: Resultsmentioning
confidence: 99%
“…The activity index (AI) [ 47 ] is calculated using the following formula: where IZD sample—inhibition zone diameter for each U. barbata extract, and IZD standard—inhibition zone diameter for each antibacterial drug, used as standard.…”
Section: Methodsmentioning
confidence: 99%
“…Laboratory in vitro studies on the potential of lichen secondary metabolites report their broad biological properties such as anticancer (Cardile et al 2017 ; Tripathi et al 2022 and literature cited therein), antioxidant (Hawrył et al 2020 ; Maulidiyah et al 2021 ), antimicrobial (Shiromi et al 2021 ; Sargsyan et al 2021 ), pro-health (Zhao et al 2021 and literature cited therein) or anti-fusarial potentials described in this meta-analysis.…”
Section: Introductionmentioning
confidence: 75%