Taste detection of the non-volatile isothiocyanate moringin results in deterrence to glucosinolate-adapted insect larvae

Phytochemistry
Caroline MüllerNiels Agerbirk

Abstract

Isothiocyanates (ITCs), released from Brassicales plants after hydrolysis of glucosinolates, are known for their negative effects on herbivores but mechanisms have been elusive. The ITCs are initially present in dissolved form at the site of herbivore feeding, but volatile ITCs may subsequently enter the gas phase and all ITCs may react with matrix components. Deterrence to herbivores resulting from topically applied volatile ITCs in artificial feeding assays may hence lead to ambiguous conclusions. In the present study, the non-volatile ITC moringin (4-(α-L-rhamnopyranosyloxy)benzyl ITC) and its glucosinolate precursor glucomoringin were examined for effects on behaviour and taste physiology of specialist insect herbivores of Brassicales. In feeding bioassays, glucomoringin was not deterrent to larvae of Pieris napi (Lepidoptera: Pieridae) and Athalia rosae (Hymenoptera: Tenthredinidae), which are adapted to glucosinolates. Glucomoringin stimulated feeding of larvae of the related Pieris brassicae (Lepidoptera: Pieridae) and also elicited electrophysiological activity from a glucosinolate-sensitive gustatory neuron in the lateral maxillary taste sensilla. In contrast, the ITC moringin was deterrent to P. napi and P. brassicae ...Continue Reading

References

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Citations

May 10, 2017·Natural Product Reports·Stefan PentzoldWilhelm Boland
Feb 27, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Gigliola BorgonovoAngela Bassoli
Aug 12, 2018·International Journal of Molecular Sciences·Veronica Lanza CariccioEmanuela Mazzon
Aug 24, 2018·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Letizia RomeoEmanuela Mazzon
Nov 2, 2018·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Xiangshe WangYuyun Lu
Sep 7, 2019·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Luigi ChiricostaEmanuela Mazzon
Mar 16, 2017·Inflammation Research : Official Journal of the European Histamine Research Society ... [et Al.]·Sabrina GiacoppoEmanuela Mazzon
Jul 15, 2017·BMC Complementary and Alternative Medicine·Sabrina GiacoppoEmanuela Mazzon
Jun 16, 2018·Scientific Reports·Letizia RomeoEmanuela Mazzon
Jul 18, 2018·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·David MathironFlorence Djedaïni-Pilard
Dec 6, 2019·International Journal of Molecular Sciences·Luigi ChiricostaEmanuela Mazzon
Aug 19, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Sylvia MainaHo-Youn Kim
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