ISSN:
1573-1561
Keywords:
Cardenolides
;
monarch butterfly
;
Danaus plexippus L.
;
Lepidoptera
;
Danaidae
;
storage
;
regulation
;
metabolism
;
uscharidin
;
calactin
;
calotropin
;
uzarigenin
;
digitoxigenin
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Chemistry and Pharmacology
Notes:
Abstract Adult monarch butterflies,Danaus plexippus L. (Lepidoptera: Danaidae), store only some of the cardenolides present in the larval milkweed (Asclepiadaceae) host. Feeding known doses of individual cardenolides to 4th instar monarch larvae led to more efficient larval tissue incorporation at low doses than at high ones, and favored storage of cardenolide glycosides over genins. A qualitative regulation also occurs during larval feeding; calactin and calotropin were stored as such but uscharidin was rapidly converted to a mixture of calactin and calotropin which were the forms stored by the larvae. Two genins, uzarigenin and digitoxigenin, were stored by larvae as polar cardenolide metabolites.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01402911
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