Antimicrobial study of the resinous exudates and of diterpenoids and flavonoids isolated from some Chilean Pseudognaphalium (Asteraceae)

Mendoza, Leonora; Wilkens, Marcela; Urzúa, Alejandro

doi:10.1016/s0378-8741(97)00084-6

Cited by 118 publications

(70 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The inhibitory activities of flavonoids against bacteria and yeast have been investigated by a number of researchers, especially in Latin America (Egil et al, 1985;Mendonza et. al., 1997;Tereschuk et al, 1997;Hernandez et al, 2000;Jussi-Pekka et al, 2000;Fukai et al, 2002).…”

Section: Resultsmentioning

confidence: 99%

An evaluation of antibacterial activities of Psidium guajava (L.)

Sanches¹,

Cortez²,

Schiavini

et al. 2005

Braz. arch. biol. technol.

172

View full text Add to dashboard Cite

The present study was designated to evaluate the antibacterial activities of aqueous and ethanol:water extracts from leaves, roots and stem bark of Psidium guajava L. The antibacterial activities of the extracts against bacteria were tested by using both microdilution assay. The aqueous extracts of P. guajava leaves, roots and stem bark were active against the gram-positive bacteria Staphylococcus aureus (MICs=500, 125 and 250 µg/ml, respectively) and Bacillus subtilis (MICs=500 µg/ml), and virtually inactive against the gram-negative bacteria Escherichia coli and Pseudomonas aeruginosa (MICs >1000 µg/ml). The ethanol:water extracts showed higher antimicrobial activity as compared to aqueous extracts. Based on this finding, the ethanol:water extract of P. guajava leaves was fractionated on silica gel column chromatography in a bioassay-guided fractionation affording flavonoid mixture, triterpenes (α-and β-amyrin) and sterol (β-sitosterol). Flavonoid mixture showed good activity on S. aureus with MIC of 25 µg/ml. β-sitosterol was inactive for all the bacteria tested.

show abstract

Section: Resultsmentioning

confidence: 99%

An evaluation of antibacterial activities of Psidium guajava (L.)

Sanches¹,

Cortez²,

Schiavini

et al. 2005

Braz. arch. biol. technol.

172

View full text Add to dashboard Cite

show abstract

“…The phytochemical screening of plant menthol extracts showed that it contain flavonoids, terpenoids, phenols, amino acids, alkaloids and tannins, which have antimicrobial properties (Fernandez et al, 1996;Mendoza et al, 1997;Amaral et al, 1998;Cowan, 1999 ;Shaheen et al, 2003;Amarowicz et al, 2008;Chowdhury et al, 2008).…”

Section: Discussionmentioning

confidence: 99%

Evaluation the Antimicrobial Activity of Artemisia and Portulaca Plant Extracts in Beef Burger

Al‐Moghazy¹,

Ammar²,

Sief³

et al. 2017

FSNS

View full text Add to dashboard Cite

show abstract

“…Flavones, flavonoids and flavonols synthesized by plants and endophytes are reported to show antibacterial properties by forming complex with extracellular proteins or with bacterial cell walls (Tsuchiya et al, 1996). Lipophilic flavonoids and terpenes can also disrupt membrane by virtue of their lipophilicity (Mendoza et al, 1997). Kovacevic (2004) has attributed the mechanism of antibacterial action of alkaloids to their ability to intercalate with DNA, inhibition of enzymes and inhibition of cell respiration.…”

Section: Phytochemical Analysismentioning

confidence: 99%

Pharmacological evaluation of endophytic Penicillium pimiteouiense SGS isolated from Simarouba glauca DC

2017

J App Pharm Sci

View full text Add to dashboard Cite

Medicinal plants are recently being recognized as resources of endophytes with interesting bioactive compounds. In the present study, pharmacological properties of the endophytic fungus Penicillium pimiteouiense SGS isolated from the medicinal plant Simarouba glauca DC were evaluated. Endophytes were isolated using surface sterilization procedure. The crude extract of cultured fungus was prepared in ethyl acetate and was evaluated for antimicrobial, antioxidant and anti hyperglycaemic activities. Phytochemical composition of the crude extract was also studied by standard qualitative assays. The extract of P. pimiteouiense SGS was found to have antimicrobial and antioxidant properties. Anti hyper glycaemic activity was also revealed by its inhibitory activities on alpha amylase and alpha glucosidase enzymes. Qualitative phyto chemical analysis of the crude extract showed presence of flavanoids, triterpenes, alkaloids and carbohydrates. The medicinal plant S. glauca needs to be explored further as a resource of rare endophytes with bio active compounds.

show abstract

Antimicrobial study of the resinous exudates and of diterpenoids and flavonoids isolated from some Chilean Pseudognaphalium (Asteraceae)

Cited by 118 publications

References 4 publications

An evaluation of antibacterial activities of Psidium guajava (L.)

An evaluation of antibacterial activities of Psidium guajava (L.)

Evaluation the Antimicrobial Activity of Artemisia and Portulaca Plant Extracts in Beef Burger

Pharmacological evaluation of endophytic Penicillium pimiteouiense SGS isolated from Simarouba glauca DC

Contact Info

Product

Resources

About