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Insects 2013, 4(4), 533-541; doi:10.3390/insects4040533
Article

Fate of Ingested Aristolactams from Aristolochia chilensis in Battus polydamas archidamas (Lepidoptera: Papilionidae)

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Received: 24 July 2013 / Revised: 29 September 2013 / Accepted: 8 October 2013 / Published: 11 October 2013
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Abstract

We performed a sequestration study of aristolactams (ALs) from Aristolochia chilensis in Battus polydamas archidamas (Lepidoptera: Papilionidae) by examining the AL content of the plant, fifth instar larvae, osmeterial secretion, pupae, exuviae and feces. Aristolactam-I (AL-I) and aristolactam-II (AL-II) present in A. chilensis are sequestered by fifth instar larvae of B. polydamas archidamas. There is a preferential sequestration of AL-II, or a more efficient metabolization and excretion of AL-I, by the larva. No ALs were found in the osmeterial secretion, pupae and exuviae; in addition, little AL-I and no AL-II were found in larval frass. The two lactams, particularly AL-I, are extensively metabolized to other products in the larva. A reasonable hypothesis is that the ingested ALs are oxidized to their respective aristolochic acids.
Keywords: Aristolochia chilensis; aristolactams; Battus polydamas archidamas; larvae; sequestration; excretion; metabolization Aristolochia chilensis; aristolactams; Battus polydamas archidamas; larvae; sequestration; excretion; metabolization
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Urzúa, A.; Olguín, A.; Santander, R. Fate of Ingested Aristolactams from Aristolochia chilensis in Battus polydamas archidamas (Lepidoptera: Papilionidae). Insects 2013, 4, 533-541.

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