BIOL 312 Lecture Notes - Lecture 14: Anaphrodisiac, Benzyl Cyanide, Malpighian Tubule System
14 Nov 2017
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Pheromones: chemical odours secreted to the outside by an individual and received by a second individual of the same species. 2) aggregation, spacing (anti-aggregation), trail-marking, e. g. pine beetles, tephritid fruit flies to discourage oviposition, ants. Kairomon: benefit receiver but disadvantage the producer (e. g. host compound that attracts a parasitoid). Allomone: benefit producer but are neutral to receiver (e. g. compounds that advertise distastefulness). Synomone: benefit producer and receiver (e. g. plant compounds that attract parasitoids that attack herbivores). A single chemical can act as all at once depending on the situation! A compound (methyl-salicylate) delivered by males upon mating reduces female attractiveness: anti- aphrodisiacs. Spermatophore and mated female have same peak in electrogram. Each pieris species has its own species-specific anti-aphrodisiac -> this signal is exploited by enemies. Wasps are more likely to mount mated female butterflies. Anti-aphrodisiac also stimulates production of plant compounds that attracts parasitoid. Benzyl cyanide of experimental wasp (similar to pheromone of mated female butterfly).
