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- W2007784558 abstract "A number of plants produce significant amounts of phytoecdysteroids that can disrupt the hormonal levels of insects feeding upon them. Insects equipped with taste receptors sensitive to phytoecdysteroids are able to avoid such plants. How common is this strategy? By recording from the lateral and medial sensilla styloconica in two polyphagous species (Ostrinia nubilalis and Spodoptera littoralis) and in a monophagous species (Bombyx mori), we tested whether the receptors could detect three commonly occurring phytoecdysteroids 20-hydroxyecdysone (20E), ponasterone A (ponA) and ecdysone (E). In B. mori, 20E and ponA elicited dose-dependent responses with a threshold of 1 &mgr;M only in the medial sensilla. In O. nubilalis, 20E, E and ponA elicited responses at threshold of 1 &mgr;M in both sensilla. In S. littoralis, 20E elicited responses with a threshold of 10 &mgr;M in both sensilla. By means of behavioural choice tests, we show that 20E is an effective feeding deterrent for O. nubilalis and S. littoralis first instar larvae. This suggests that the perception of phytoecdysteroids is more common among phytophagous lepidoptera than previously thought, although their toxicity or antifeedancy varies between species." @default.
- W2007784558 created "2016-06-24" @default.
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- W2007784558 date "2002-04-01" @default.
- W2007784558 modified "2023-10-16" @default.
- W2007784558 title "Taste detection of phytoecdysteroids in larvae of Bombyx mori, Spodoptera littoralis and Ostrinia nubilalis" @default.
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- W2007784558 doi "https://doi.org/10.1016/s0022-1910(02)00068-9" @default.
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