'EssentialOil of Azorella cryptantha Collected in Two Different Locations from San Juan Province, Argentine. Chemical Variability, Anti-Insect andAntimicrobial Activities'

SANDRA LÓPEZ; BEATRIZ LIMA; LILIANA ARAGÓN; LUIS ARIZA ESPINAR; ALEJANDRO TAPIA; SUSANA ZACCHINO; JULIO ZYGADLO; GABRIELA EGLY FERESIN*(CO-CORRESPONDING AUTHOR); MARÍA L. LÓPEZ*(CO-CORRESPONDING AUTHOR)

Chemistry and Biodiversity

WILEY-V C H VERLAG GMBH

Año: 2012 p. 1452 - 1464

1612-1872

EThe essential oils (EOs) of two populations of Azorella cryptantha (Clos) Reiche, a native species from San Juan Province, were obtained by hydrodistillation in a Clevenger-type apparatus and characterized 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 the identity and content of the main compounds and also in the identity of minor components. The main compounds of the Ac-BAU EO were a-pinene, a-thujene, sabinene, d-cadinene, d-cadinol, trans-b-guaiene,and t-muurolol, while a-pinene, a-thujene, b-pinene, g-cadinene, t-cadinol, d-cadinene, t-muurolol,and a not identified compound were the main constituents of the Ac-AN EO, which also contained 3.0% of oxygenated monoterpenes. The repellent activity on Triatoma infestans nymphs was 100 and 92% for the Ac-AN and Ac-BAU EOs, respectively. Regarding the toxic effects on Ceratitis capitata, the EOs were very active with LD50 values lower than 11 mg/fly. The dermatophytes Microsporum gypseum, Trichophyton rubrum, and T. mentagrophytes and the bacterial strains Escherichia 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.