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Helena Bichão Anna-Karin Borg-Karlson Atle Wibe Jorge Araújo Hanna Mustaparta 《Chemoecology》2005,15(4):211-226
Summary. An important question in insect-plant interactions is which of the numerous plant compounds contribute to the perception of
odour qualities in herbivorous insects and are likely to be used as cues in host-searching behaviour. In order to identify
which plant-produced volatiles the strawberry blossom weevil Anthonomus rubi detects, we have used electrophysiological recordings from single olfactory neurones linked to gas chromatography and mass
spectrometry. We here present 15 receptor neurone types specialised for naturally produced compounds present in the host and
nonhost plants and two types for two aggregation pheromone components. The active compounds were terpenoids, aromatic and
aliphatic esters, alcohols and aldehydes, some of which are induced by feeding activity of the weevils. The neurones were
characterised by a strong response to one or two primary odorants and weaker responses to a few others having similar chemical
structure. With one exception, the molecular receptive range of each neurone type was within one chemical group. Enantiomers
of linalool separated on a chiral column activated two neurone types with different enantioselectivity. Inhibition by linalool
of another neurone type, excited by α-pinene, indicated an additional mechanism for coding the information about this compound.
Altogether, detection of 54 compounds by olfactory receptor neurones is shown, of which 40 have been chemically identified
in this study. Thus A. rubi has the ability to detect a large number of odorants that may be used in host selection behaviour. 相似文献
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Marit?StrandenEmail author Tonette?R?stelien Ilme?Liblikas Tor?J.?Almaas Anna-Karin?Borg-Karlson Hanna?Mustaparta 《Chemoecology》2003,13(3):143-154
Summary. Some plant volatiles are produced in response to
herbivory of several insect species, including heliothine
larvae. In the present study of female heliothine moths, four
co-located receptor neurone types were identified, of which
three types responded strongest to the inducible compounds
E--ocimene, E,E--farnesene and E,E-TMTT, respectively.
The fourth type responded strongest to geraniol,
which is a common floral volatile. The narrow tuning of
each receptor neurone type was demonstrated by responses
to a few structurally-related monoterpenes, sesquiterpenes,
homo-terpenes and monoterpene alcohols, respectively, out
of hundreds of plant constituents tested. The four neurone
types showed the same relation of spike amplitudes and
ranking of effective compounds in the three heliothine
species; the polyphagous Heliothis virescens and
Helicoverpa armigera and the oligophagous Helicoverpa
assulta. The results indicate the presence of functionally
similar types of plant odour-receptor neurones in the three
related species, and suggest conservation or reappearance of
functionally similar olfactory receptors in related species,
independent of the evolution of polyphagy and oligophagy. 相似文献
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