Essential oil of Azorella cryptantha collected in two different locations from San Juan Province, Argentina: chemical variability and anti-insect and antimicrobial activities.
The 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 α-pinene, α-thujene, sabinene, δ-cadinene, δ-cadinol, trans-β-guaiene, and τ-muurolol, while α-pinene, α-thujene, β-pinene, γ-cadinene, τ-cadinol, δ-cadinene, τ-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 LD(50) values lower than 11 μg/fly. The dermatophytes Microsporum gypseum, Trichophyton rubrum, and T. mentagrophytes and the bacterial strains Escherichia coli LM(1), E. coli LM(2), and Yersinia enterocolitica PI were more sensitive toward the Ac-AN EO (MIC 125 μg/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.
Instituto de Biotecnología - Instituto de Ciencias Básicas, Universidad Nacional de San Juan, Av. Libertador General San Martín 1109 (O), CP5400, San Juan, Argentina.
Sandra
S
López
Beatriz
B
Lima
Liliana
L
Aragón
Luis Ariza
LA
Espinar
Alejandro
A
Tapia
Susana
S
Zacchino
Julio
J
Zygadlo
Gabriela Egly
GE
Feresin
María Liza
ML
López
D000818:Animals; D000890:Anti-Infective Agents / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology; D019661:Apiaceae / Q000737:chemistry*; D001118:Argentina; D001419:Bacteria / Q000187:drug effects; D001424:Bacterial Infections / Q000188:drug therapy; D005658:Fungi / Q000187:drug effects; D006801:Humans; D007313:Insecta / Q000187:drug effects; D007306:Insecticides / Q000737:chemistry* / Q000302:isolation & purification / Q000633:toxicity; D009181:Mycoses / Q000188:drug therapy; D009822:Oils, Volatile / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology; D010938:Plant Oils / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology
D000890:Anti-Infective Agents; D007306:Insecticides; D009822:Oils, Volatile; D010938:Plant Oils