Constituents of leaves and flowers essential oils of Helichrysum pallasii (Spreng.) Ledeb. growing wild in Lebanon.
The chemical compositions of the essential oils obtained from leaves and flowers of Helichrysum pallasii were analyzed by gas chromatography and gas chromatography-mass spectrometry. Among the 102 identified constituents, hexadecanoic acid (16.2%), (Z,Z)-9,12-octadecadienoic acid (6.8%), tetradecanoic acid (2.6%), and (Z)-caryophyllene (4.2%) were the main constituent of the oil from leaves, while in the oil from flowers hexadecanoic acid (14.7%), (Z,Z)-9,12-octadecadienoic acid (14.2%), (Z)-caryophyllene (3.6%), and delta-cadinene (3.1%) predominated. The oils were both characterized by sesquiterpenes (33.4% for leaves and 33.7% for flowers, respectively) and fatty acids and esters (30.3% in leaves and 35% in flowers, respectively). The in vitro activity of the essential oils of the plant against some microorganisms in comparison with chloramphenicol by the broth dilution method was determined. The oils exhibited a weak activity as inhibitors of growth of Staphylococcus epidermidis in vitro (minimum inhibitory concentration = 100 microg/mL).
Formisano
Carmen
C
Dipartimento di Chimica delle Sostanze Naturali, Università degli Studi di Napoli Federico II, Napoli, Italy.
Mignola
Enrico
E
Rigano
Daniela
D
Senatore
Felice
F
Arnold
Nelly Apostolides
NA
Bruno
Maurizio
M
Rosselli
Sergio
S
D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000032:analysis; D001419:Bacteria / Q000187:drug effects; D004952:Esters / Q000032:analysis; D005227:Fatty Acids / Q000032:analysis; D005231:Fatty Acids, Unsaturated / Q000032:analysis; D035264:Flowers; D036562:Helichrysum / Q000737:chemistry*; D007861:Lebanon; D019814:Myristic Acid / Q000032:analysis; D009822:Oils, Volatile / Q000737:chemistry* / Q000494:pharmacology*; D019308:Palmitic Acid / Q000032:analysis; D010936:Plant Extracts / Q000737:chemistry / Q000494:pharmacology; D018515:Plant Leaves; D010938:Plant Oils / Q000737:chemistry* / Q000494:pharmacology; D000081223:Polycyclic Sesquiterpenes; D012717:Sesquiterpenes / Q000032:analysis; D013212:Staphylococcus epidermidis / Q000187:drug effects
D000900:Anti-Bacterial Agents; D000894:Anti-Inflammatory Agents, Non-Steroidal; D004952:Esters; D005227:Fatty Acids; D005231:Fatty Acids, Unsaturated; D009822:Oils, Volatile; D010936:Plant Extracts; D010938:Plant Oils; D000081223:Polycyclic Sesquiterpenes; D012717:Sesquiterpenes; D019814:Myristic Acid; C027369:octadecadienoic acid; D019308:Palmitic Acid; C024714:caryophyllene