ISSN:
1573-1561
Keywords:
Cabbage butterfly
;
Pieris rapae
;
Lepidoptera
;
Pieridae
;
Erysimum
;
oviposition deterrent
;
cardenolides
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Chemistry and Pharmacology
Notes:
Abstract Avoidance ofErysimum cheiranthoides for oviposition byPieris rapae has been attributed to the presence of water-soluble deterrents. The active material was extracted inton-butanol and isolated by a series of HPLC separations. TLC of the active fraction and visualization of individual constituents with Kedde's reagent indicated that cardenolides are responsible for deterring oviposition. UV spectra were also characteristic of cardenolides. Bioassays of selected known cardenolides revealed a general lack of activity, except for cymarin, which was as strongly deterrent as the most prominent cardenolide isolated in pure form fromE. cheiranthoides. The results suggest that cardenolides in this plant can explain its escape from cabbage butterflies, but specific structural features of the glycosides are necessary for oviposition-deterring activity.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01014106
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