Chemical composition and antibacterial activity of essential oils from verbenaceae species: alternative sources of (E)-caryophyllene and germacrene-D

Abstract

Volatile oils from the leaves of Verbenaceae species Aloysia virgata, Lantana camara, Lantana trifolia, Lantana montevidensis, Lippia brasiliensis and Lippia sericea were investigated for its chemical composition and antibacterial activity. The volatile oils were characterized by a high content of sesquiterpenes of which (E)-caryophyllene (10-35%), germacrene-D (5-46%) and bicyclogermacrene (7-17%) were the major components for all studied species. For the flowers, a higher concentration of monoterpenes was observed for the species L. camara, L. trifolia and L. brasiliensis. These compounds probably act as attractive to specific pollinators. The volatile oils from A. virgata was the most active, exhibiting moderate antimicrobial activity against the bacteria Staphylococcus aureus, Bacillus cereus and Escherichia coli

In vitro activity of essential oils of Lippia sidoides and Lippia gracilis and their major chemical components against Thielaviopsis paradoxa, causal agent of stem bleeding in coconut palms

“…Montanari et al 16 Standard deviation: PIC = 0.38 and NC = 2.68. demonstrated the promising possibility of using of the essential oils from A. virgata, L. brasiliensis, L. montevidensis and L. trifolia as an alternative to some disinfectants and preservatives against Grampositive and Gram-negative bacteria.…”

“…L. sidoides oil contained 42.33% thymol and 4.56% carvacrol, whereas L. gracilis oil had 18% thymol and 27.59% carvacrol (Table 2). However, Albuquerque et al 16 found 10% thymol and 41.7% carvacrol in L. gracilis oil.…”

Essential oil of Cymbopogon flexuosus, Vernonia polyanthes and potassium phosphite in control of bean anthracnose

“…These results demonstrate that microorganisms differ in their resistance to certain essential (Table 1). Montanari et al (2011) attributed antimicrobial activity to sesquiterpene due to inhibition of breathing capacity and increased cell membrane permeability, as well as rupture of membrane integrity which results in leakage of K + ions and consequent loss of chemiosmosis control. Oils of Lantana camara and Aloysia virgata, rich in germacrene-D, showed moderate antibacterial activity against Gram-positive bacteria (B. cereus and S. aureus) and oil of A. virgata was active against Gram-negative bacteria (Costa et al, 2009).…”

Chemical Constituents with Free-Radical- Scavenging Activity from the Leaves of Lantana montevidensis (Spreng.) Briq.

“…4,9 Our previous phytochemical study on 70% methanolic extract of L. montevidensis leaves led to the isolation of pentacyclic triterpenoids. 10 In continuation of our investigation, we report herein the isolation and identification of seven flavonoids (1)(2)(3)(4)(5)(6)(7) in addition to salicylic acid (8) and β-sitosterol-3-O-glucoside (9). Furthermore, some of the isolated flavonoids were evaluated for their free radical scavenging activity.…”

“…4 The leaves essential oil in addition to the ethanolic extracts of the leaves and roots exhibited promising antimicrobial activity. 2,3,[5][6][7] Furthermore, the 70% aqueous methanolic extract of the leaves presented antibacterial, anti-inflammatory, anti-pyretic, antioxidant and analgesic activities. 8 Various flavones had been reported from the leaves of L. montevidensis.…”