Clytostoma callistegioides (Bignoniaceae) wax extract with activity on aphid settling.
Dublin Core
Título
Clytostoma callistegioides (Bignoniaceae) wax extract with activity on aphid settling.
Tema
ACIDOS GRASOS
CERAS
ECOLOGIA
CLYTOSTOMA CALLISTEGIOIDES
BIGNONIACEAE
BIBLIOGRAFIA NACIONAL QUIMICA
2010
Abstract
A bioassay-guided fractionation of leaf extracts from Clytostoma callistegioides (Cham.) Bureau ex Griseb. (Bignoniaceae) led to isolation of a natural mixture of four fatty acids with anti-insect activity against aphids. The compounds were identified by GC–MS as palmitic, stearic, linoleic and linolenic acids and quantified as their methyl esters. The anti-aphid activity of the natural mixture was traced to linolenic and linoleic acids, as shown by the settling inhibition activity of synthetic samples. Interestingly, the saturated acids (palmitic and stearic) tested alone stimulated settling on one of the tested aphids (Myzus persicae), but not on the other tested species (Rhopalosiphum padi). Although ubiquitous, none of these free acids have been previously reported in this Bignoniaceae species. The leaf surface chemistry, which is likely involved in modulating aphid settling behavior, was further investigated for the occurrence of lipophilic substances by histochemical staining. Short, stalked glandular trichomes, previously undescribed for this species, stained with osmium tetroxide and Sudan III, suggesting that the secretion of the defensive acids is related to these surface trichomes.
Autor
Castillo, Lucía
Díaz, Martina
González-Coloma, Azucena
Bassagoda, María Julia
Fuente
Phytochemistry v. 71, no. 17-18, 2010. -- p. 2052-2057
Editor
Elsevier
Fecha
2010
Formato
PDF
Idioma
Inglés
Tipo
Artículo
Identificador
doi:10.1016/j.phytochem.2010.08.016
Document Item Type Metadata
Original Format
PDF
- Fecha de agregación
- December 2, 2014
- Tipo de Elemento
- Document
- Etiquetas
- Ácidos grasos, Bignoniaceae, Ceras, Clytostoma Callistegioides, Ecología
- Citación
- Castillo, Lucía, “Clytostoma callistegioides (Bignoniaceae) wax extract with activity on aphid settling.,” RIQUIM - Repositorio Institucional de la Facultad de Química - UdelaR, accessed April 26, 2024, https://riquim.fq.edu.uy/items/show/2115.
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