Essential oil analysis of Micromeria nubigena HBK and its antimicrobial activity

• Water-distilled essential oil from leaves and flowers of Micromeria nubigena H.B.K. (Lamiaceae) were analyzed by GC and GUMS systems. The major components identified were thymol (36.9%), carvacrol (16.7%), pulegone (10.8%), caryophyllene oxide (4.6%) and (E)-phytol (3.2%). The major volatiles released by beta P-glucosidase treatment of the aqueous plant residue were (Z)-3-hexenol (31.2%), (4-2-hexenol (18.3%) and delta-cadinene (3.4%). The oil showed significant antibacterial activity against Staphylococcus aureus, Escherichia coli, Klebsiella pneumonia, and Pseudomonas aeruginosa, and antifungal activity against Candida albicans, Botrytis cinerea and Aspergillus niger, while the beta-glucosidase-liberated fraction was inactive.

Subject headings

NATURVETENSKAP  -- Kemi (hsv//swe)

NATURAL SCIENCES  -- Chemical Sciences (hsv//eng)

Keyword

Micromeria nubigena

Lamiaceae

essential oil composition

thymol

carvacrol

pulegone

bound volatiles

antimicrobial activity

Chemistry

Kemi

Publication and Content Type

ref (subject category)

art (subject category)