Essential Oil of Azorella cryptantha Collected in Two Different Locations from San Juan Province, Argentina: Chemical Variability and Anti-Insect and Antimicrobial Activities

LOPEZ SANDRA; LIMA BEATRIZ; ARAGON LILIANA; ARIZA ESPINAR, LUIS; ALEJANDRO TAPIA; ZACCHINO SA; J. ZYGADLO; EGLY FERESIN G; LOPEZ MARÍA LIZA

chemistry & biodiversity

Wiley

Lugar: Zurich; Año: 2012 vol. 9 p. 1452 - 1464

1612-1880

The essential oils (EOs) of two populations of Azorella cryptantha (Clos) Reiche, a native speciesfrom San Juan Province, were obtained by hydrodistillation in a Clevenger-type apparatus andcharacterized by GC-FID and GC/MS analyses. The compounds identified amounted to 92.3 and 88.7%of the total oil composition for A. cryptantha from Bauchaceta (Ac-BAU) and Agua Negra (Ac-AN),respectively. The EO composition for the two populations was similar, although with differences in theidentity and content of the main compounds and also in the identity of minor components. The maincompounds of the Ac-BAU EO were a-pinene, a-thujene, sabinene, d-cadinene, d-cadinol, trans-bguaiene,and t-muurolol, while a-pinene, a-thujene, b-pinene, g-cadinene, t-cadinol, d-cadinene, tmuurolol,and a not identified compound were the main constituents of the Ac-AN EO, which alsocontained 3.0% of oxygenated monoterpenes. The repellent activity on Triatoma infestans nymphs was100 and 92% for the Ac-AN and Ac-BAU EOs, respectively. Regarding the toxic effects on Ceratitiscapitata, the EOs were very active with LD50 values lower than 11 mg/fly. The dermatophytesMicrosporum gypseum, Trichophyton rubrum, and T. mentagrophytes and the bacterial strainsEscherichia coli LM1, E. coli LM2 , and Yersinia enterocolitica PI were more sensitive toward the Ac-AN EO (MIC 125 mg/ml) than toward the Ac-BAU EO. This is the first report on the composition of A.cryptantha EO and its anti-insect and antimicrobial properties.