Antimicrobial Activity and Analyses of Six Geranium L. Species with Headspace SPME and Hydrodistillation

WOS: 000392643400012A solid phase microextraction (SPME) method with gas chromatography-mass spectrometry (GC-MS) was used for analyses of the volatile compounds of six Geranium species; G. asphodeloides, G. psilostemon, G. purpureum, G. pyrenaicum, G. robertianum and G. sanguineum. the results were compared with those obtained by hydrodistillation. According to the results of the study, the major compounds identified in the SPME extracts were sabinen (33.5 %) (G. asphodeloides), caryophyllene (34.1 %, 21.7 %, 11.2 %) (G. psilostemon, G. purpureum and G. robertianum), germacrene D (25.2 %) (G. pyrenaicum), and alloaromadendrene (19.8 %) (G. sanguineum) whereas hydrodistillation (HD) essential oils were rich in benzene acetaldehyde (30 %, 25.7 %) (G. asphodeloides, G. sanguineum), caryophyllene (34.3 %, 11.3 %) (G. psilostemon and G. robertianum), hexadecanoic acid (36.2 %, 15.1 %) (G. purpureum and G. pyrenaicum). the oils were screened for antimicrobial activity against 10 microorganisms and showed antibacterial and antifungal activities against Staphylococcus aureus, Bacillus cereus, Mycobacterium smegmatis, Candida albicans and Saccharomyces cerevisiae

Antimicrobial Activity Of Three Scutellaria L. Species From Turkey

Plant-sourced antimicrobials are known for their therapeutic potency against multi-drug-resistant pathogens. The members of Scutellaria L. have been used to cure several diseases in East Asia, Europe, and North America. The genus Scutellaria belonging to Lamiaceae family is composed of around 360 species worldwide and 18 species in Turkey. In this study, 36 extracts prepared with different solvents from aerial parts and roots of S. salviifolia Benth., S. diffusa Benth. and S. pontica C. Koch were investigated for their antimicrobial activity against four bacteria (Escherichia soli ATCC 25922, Enterococcus faecalis ATCC 29212, Pseudomonas aeruginosa ATCC 27853, Staphylococcus aureus ATCC 29213) and three yeasts (Candida albicans ATCC 90028, C. krusei ATCC 6258, C. parapsilosis ATCC 90018) by using the broth microdilution method. Gentamicin, vancomycin and fluconazole were used as positive control. According to our results, all of the tested extracts showed stronger antimicrobial activity against yeasts than bacteria. The chloroform extract of S. salviifolia root showed the highest antifungal effect against C. krusei with 32 mu g/ml MIC value compared with all the tested extracts and the positive control fluconazole (64 mu g/ ml MIC value).WoSScopu

Flavonoid Derivatives From The Aerial Parts Of Trifolium Trichocephalum M. Bieb. And Their Antioxidant And Cytotoxic Activity

Trifolium L. species with a rich isoflavone content have been used as expectorant, analgesic, antiseptic, tonic, and wound- healer in folk medicine. The aim of the study is to evaluate pharmacological properties of the extracts and isolated compounds of T. tricocephalum. Phytochemical investigation of the aerial parts of T. trichocephalum led to the isolation of daidzein, genistein, quercetin, and daidzein 4'-O-beta-glucoside for the first time from this species. Isolated compounds along with the methanol extract, water, ethyl acetate and chloroform subextracts were tested for their radical scavenging and cytotoxic activity which was evaluated by MTT assay. According to the results of activity tests, extracts showed a concentration-dependent radical scavenging activity as well as cytotoxic effect on HepG2 cells at 400 mu g/mL, whereas the compounds did not exert any obvious cytotoxic effect at tested concentrations.Wo

Memory-vitalizing effect of twenty-five medicinal and edible plants and their isolated compounds

The extracts from 25 plant species from Salvia, Hypericum, Onosma, Thymus, Origanum, Rosa, and Prunus with eight isolated compounds were screened for their memory-vitalizing potential against the enzymes, i.e., acetyl cholinesterase (AChE), butyrylcholinesterase (BChE), and tyrosinase (TYR) along with DPPH, DMPD, and NO radicals and iron-chelation capacity using spectrophotometric microtiter assays. The n-hexane:dichloromethane (1:1) extract of Onosma nigricaule roots (63.18 +/- 0.56\%) and the ethyl acetate extract of the aerial parts of Hypericum capitatum var. capitatum (50.79 +/- 3.88\%) were the most active toward AChE and BChE, respectively. The highest iron-chelating capacity was found in the n-hexane extract of Thymus sipyleus subsp. sipyleus var. sipyleus, where mostly Labiatae species exhibited better radical scavenging effect. Among the extracts, the roots of O. nigricaule, the aerial parts of Hypericum capitatum var. capitatum and T. sipyleus subsp. sipyleus var. sipyleus could be further evaluated for their memory-vitalizing properties based on different mechanisms. (C) 2015 SAAB. Published by Elsevier B.V. All rights reserved