Chemical Composition and Antimicrobial Activity of the Essential Oils of Anthospermum emirnense and Anthospermum perrieri (Rubiaceae)

Abstract

The essential oils of Anthospermum emirnense Baker and Anthospermum perrieri Homolle ex Puff, obtained by hydrodistillation in 0.03 and 0.02% yield, respectively, were analyzed by GC/MS. In both cases, the major constituents consisted of sesquiterpene hydrocarbons and oxygenated sesquiterpenes. The two species showed an important qualitative similarity, with 40 compounds common to A. emirnense and A. perrieri, including β-elemene, trans-β-caryophyllene, caryophyllene oxide, and τ-cadinol, which were major components in both cases. When tested for antimicrobial activity, both essential oils showed similar profiles and exhibited interesting minimal-inhibitory-concentration (MIC) values towards Bacillus subtilis, Chryseobacterium indologenes, Flavimonas oryzihabitans, and Yersinia enterocolitica.

Chemical Composition and Antibacterial Activity of Essential Oils from Different Parts of Leonurus japonicus Houtt.

“…Further investigation on the isolated compounds of “Yimucao oil” showed that β -caryophyllene had favorable antibacterial activity against Gram-positive bacteria, with MICs from 0.032 to 0.256 mg/mL and MBCs from 0.064 to 0.256 mg/mL. The results were consistent with the earlier reports [ 15 , 16 , 17 ]. In particular, β -caryophyllene was reported to show significant antibacterial activity against E. faecium and E. faecalis , the MICs (each 0.025 mg/mL) in the previous investigation were very similar to those in this study (each 0.032 mg/mL).…”

“…In addition, the antibacterial assay displayed that β -caryophyllene was inactive against Gram-negative bacteria, including Enterobacter cloacae , Escherichia coli , Moraxella catarrhalis , Klebsiella pneumoniae and Pseudomonas maltophila , whereas some reports found β -caryophyllene to be active against other Gram-negative bacteria strains, such as Achromobacter xylosoxidans denitrificans , Escherichia coli , Chryseobacterium indologenes , Citrobacter freundii and Flavimonas oryzihabitans . However, the MICs against E. coli were obvious different among the reports (0.625–12.8 mg/mL) [ 15 , 16 , 17 , 18 , 19 ]. This may be the consequence of a problem with the solubility of β -caryophyllene, which we also experienced during our study.…”

Nigella damascena L. Essential Oil—A Valuable Source of β-Elemene for Antimicrobial Testing

“…The literature data show the activity of many essential oils containing β-elemene (including EO from C. wenyujin ) against different pathogenic bacteria [ 29 , 30 , 31 ]; however, the activity of β-elemene itself was studied only by Zhu et al [ 31 ] and our team. In the previous report, β-elemene was active against Gram-positive bacteria Propionibacterium acnes , and Staphylococcus aureus (strain different than in our study), as well as against fungus Malassezia furfur [ 31 ].…”

Volatile Organic Compounds Emissions from Luculia pinceana Flower and Its Changes at Different Stages of Flower Development

“…For example, paeonol has several interesting biological activities, and it has been used as an anti-inflammatory, analgesic, antioxidant, antidiabetic, and acaricidal agent [13,14]; cyclosativene demonstrates strong anti-inflammatory, expectorant, antifungal effect [15]; γ-muurolene and δ-cadinene have antifungal properties. Despite the fact that essential oils are seldom encountered in the Rubiaceae [16], L. pinceana would have a lot of potential for essential oil extraction according to the L. pinceana solid phase microextraction results. Not only that, the essential oil of L. pinceana flowers might have special therapeutic qualities in view of the above active ingredients among the volatile compounds.…”

“…The same scenario was noted in the floral essential oil of Randia matudae [17] compared to other species of different genera in the family Rubiaceae. In contrast, the quantity and amount of predominant compounds in the floral scent of Posoqueria latifolia [18], the leaf essential oil of Rustia formosa and the essential oil from aerial parts of Anthospermum emirnense and A. perrieri were sesquiterpenes [16,19]; the floral scent of Cephalanthus occidentalis , Warszewiczia coccinea and Gardenia jasminoides were monoterpenes [20,21]; the floral scent of Coffea Arabica were aliphatics [22]. It has been reported that the floral scent composition probably significantly varied amongst closely related species, and our results partly support this view [10].…”