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
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Citación
Castillo, Lucía, “Clytostoma callistegioides (Bignoniaceae) wax extract with activity on aphid settling.,” RIQUIM - Repositorio Institucional de la Facultad de Química - UdelaR, accessed September 15, 2019, http://riquim.fq.edu.uy/items/show/2115.
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