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Chemical Defence in Central American Non-Ant-Acacias
S. S. Rehr, P. P. Feeny and D. H. Janzen
Journal of Animal Ecology
Vol. 42, No. 2 (Jun., 1973), pp. 405-416
Published by: British Ecological Society
Stable URL: http://www.jstor.org/stable/3294
Page Count: 12
You can always find the topics here!Topics: Ants, Leaves, Insect larvae, Phytophagous insects, Chemicals, Species, Plants, Glycosides, Armyworms, Larval development
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(1) Certain species of Acacia in Central America gain protection against herbivores by means of a mutualistic association with ants. We have found that the foliage of other acacia species, not protected by ants, is toxic to larvae of the southern armyworm when it is incorporated into an artificial diet; diets of ant-acacia foliage, however, support normal growth. (2) Leaves of several species of non-ant-acacia were found to be cyanogenic, while ant-acacia leaves contain no cyanide. (3) The southern armyworm proved to be a cyanide-tolerant insect, so that the presence in non-ant-acacia leaves of an additional toxic chemical is suggested. (4) We found no evidence of alkaloids in the foliage of the toxic non-ant-acacias.
Journal of Animal Ecology © 1973 British Ecological Society