Semiochemicals related to the aphid Cinara pilicornis and its host, Picea abies: a method to assign nepetalactone diastereomers.
J Chromatogr A
; 1180(1-2): 165-70, 2008 Feb 08.
Article
em En
| MEDLINE
| ID: mdl-18166192
ABSTRACT
Volatiles released by seedlings of Norway spruce infested with the aphid Cinara pilicornis were analyzed using SPME-GC-MS. Among the stress-induced compounds released by the host plant, citronellol, cis-trans-nepetalactone and cis-trans-nepetalactol was found. These compounds originated from the aphids and they were assumed to be pheromone components for this aphid species. To determine the relative stereochemistry of the nepetalactone, a diagnostic method was developed. The method was based on multivariate analysis of tabulated relative intensities of mass fragments of the four nepetalactone diastereomers. In the practical method described, a few pairs of fragments in the mass spectra were compared and, in combination with the Kovat's index, were used to unambiguously identify the relative stereochemistry of the nepetalactone.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Afídeos
/
Picea
/
Cromatografia Gasosa-Espectrometria de Massas
Limite:
Animals
Idioma:
En
Ano de publicação:
2008
Tipo de documento:
Article