Antennal perception of oilseed rape,Brassica napus (Brassicaceae), volatiles by the cabbage seed weevilCeutorhynchus assimilis (Coleoptera, Curculionidae)

Blight, Margaret M.; Pickett, John A.; Wadhams, L. J.; Woodcock, C. M.

doi:10.1007/bf02033667

Cited by 120 publications

(84 citation statements)

References 18 publications

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“…Functional characterization of this ORN in conjunction with behavioral testing of the ligand would be desirable in order to consolidate the relevance of ORN interactions. In fact, inhibition of Acells when Bcells respond seems to be a common phenomenon (Blight et al, 1995;Hallem et al, 2004;), but it has not been systematically addressed.…”

Section: Discussionmentioning

confidence: 99%

Peripheral modulation of pheromone response by inhibitory host compound in a beetle

Andersson

Larsson

Blaženec

et al. 2010

Journal of Experimental Biology

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SUMMARYWe identified several compounds, by gas chromatographic-electroantennographic detection (GC-EAD), that were antennally active in the bark beetle Ips typographus and also abundant in beetle-attacked spruce trees. One of them, 1,8-cineole (Ci), strongly inhibited the attraction to pheromone in the field. Single-sensillum recordings (SSRs) previously showed olfactory receptor neurons (ORNs) on I. typographus antennae selectively responding to Ci. All Ci neurons were found within sensilla co-inhabited by a pheromone neuron responding to cis-verbenol (cV); however, in other sensilla, the cV neuron was paired with a neuron not responding to any test odorant. We hypothesized that the colocalization of ORNs had a functional and ecological relevance. We show by SSR that Ci inhibited spontaneous activity of the cV neuron only in sensilla in which the Ci neuron was also present. Using mixtures of cV and Ci, we further show that responses to low doses (1-10ng) of cV were significantly reduced when the colocalized Ci neuron simultaneously responded to high doses (1-10mg) of Ci. This indicated that the response of the Ci neuron, rather than ligand-receptor interactions in the cV neuron, caused the inhibition. Moreover, cV neurons paired with Ci neurons were more sensitive to cV alone than the ones paired with the non-responding ORN. Our observations question the traditional view that ORNs within a sensillum function as independent units. The colocalization of ORNs might sharpen adaptive responses to blends of semiochemicals with different ecological significance in the olfactory landscape.

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Section: Discussionmentioning

confidence: 99%

Peripheral modulation of pheromone response by inhibitory host compound in a beetle

Andersson

Larsson

Blaženec

et al. 2010

Journal of Experimental Biology

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“…Green leaf volatiles and specific host-related compounds were demonstrated to play a significant role in overall perception and recognition of host odour. In a response study with cabbage seed weevil antenna to volatiles in air entrainment-derived extracts of oilseed rape, using electroantennograms coupled with GC-single cell recording, it was shown that isothiocyanate perception is mediated by three types of olfactory cells, which show differential response to 3-butenyl, 4-pentenyl and 2-phenylethyl isothiocyanate (Blight et al, 1995). The responses of cabbage seed weevil to other electrophysiologically-active volatiles from rape were tested in a linear track olfactometer (Bartlet et al, 1997).…”

Section: Plants (Brassica Spp)-herbivores (Ceutorhynchus Assimilis)mentioning

confidence: 99%

Defence mechanisms of Brassicaceae: implications for plant-insect interactions and potential for integrated pest management. A review

Ahuja

Rohloff

Bones

2010

Agron. Sustain. Dev.

212

165

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-Brassica crops are grown worldwide for oil, food and feed purposes, and constitute a significant economic value due to their nutritional, medicinal, bioindustrial, biocontrol and crop rotation properties. Insect pests cause enormous yield and economic losses in Brassica crop production every year, and are a threat to global agriculture. In order to overcome these insect pests, Brassica species themselves use multiple defence mechanisms, which can be constitutive, inducible, induced, direct or indirect depending upon the insect or the degree of insect attack. Firstly, we give an overview of different Brassica species with the main focus on cultivated brassicas. Secondly, we describe insect pests that attack brassicas. Thirdly, we address multiple defence mechanisms, with the main focus on phytoalexins, sulphur, glucosinolates, the glucosinolate-myrosinase system and their breakdown products. In order to develop pest control strategies, it is important to study the chemical ecology, and insect behaviour. We review studies on oviposition regulation, multitrophic interactions involving feeding and host selection behaviour of parasitoids and predators of herbivores on brassicas. Regarding oviposition and trophic interactions, we outline insect oviposition behaviour, the importance of chemical stimulation, oviposition-deterring pheromones, glucosinolates, isothiocyanates, nitriles, and phytoalexins and their importance towards pest management. Finally, we review brassicas as cover and trap crops, and as biocontrol, biofumigant and biocidal agents against insects and pathogens. Again, we emphasise glucosinolates, their breakdown products, and plant volatile compounds as key components in these processes, which have been considered beneficial in the past and hold great prospects for the future with respect to an integrated pest management.Brassicas / insect pests / chemical ecology / trophic levels / glucosinolates / isothiocyanates / defence mechanisms / biocontrol / trap crops / integrated pest management

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“…Some insects can identify unsuitable hosts by detecting ratios of common plant components * Corresponding author: sunjh@ioz.ac.cn not normally encountered in suitable hosts [5,25,26]. The importance of terpenes present in coniferous trees as oviposition stimulants or feeding deterrents to bark and wood boring insects has been well established [1,12,14,21].…”

Section: Introductionmentioning

confidence: 99%

Des composés émis par les arbres-hôtes stressés sont attractifs pour le cérambycidé Monochamus alternatus

Fan

Sun

Jin³

2007

Ann. For. Sci.

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-Ovipositing female Japanese sawyer beetles, Monochamus alternatus, prefer stressed Pinus massoniana over healthy trees. Host discrimination by M. alternatus suggests that changes in the chemical composition of pines may mediate the host preference of beetles. Volatile compounds from stressed and healthy pine stems were collected using absorbent trap collection method. Significant differences in absolute terpene quantities between stressed and healthy pines occurred for 7 of 10 terpenes. Field trials demonstrated that four terpenes identified from host pines were attractive to M. alternatus with (+)-α-pinene as the most attractive compound to M. alternatus. Ethanol appeared to be an important synergistic compound causing significant increase in attraction.Monochamus alternatus / pine volatile / trapping / terpene / attractant Résumé -Des composés émis par les arbres-hôtes stressés sont attractifs pour le cérambycidé Monochamus alternatus. Les femelles du céram-bycidé Monochamus alternatus préfèrent pondre sur les arbres stressés que sur les arbres sains de Pinus massoniana. Cette discrimination dans le choix de l'hôte par l'insecte pourrait être reliée à des modifications intervenues dans la composition chimique des pins. Les composés volatils émis par des pins stressés et sains ont été collectés en utilisant une méthode de piégeage sur résine adsorbante. La quantité absolue de 7 terpènes sur les 10 analysés diffère significativement entre pins stressés et sains. Des essais sur le terrain ont montrés que 4 de ces terpènes sont attractifs pour M. Alternatus. l'(+)-α-pinène étant le compose le plus attractif. L'éthanol semble être un composé synergique induisant une augmentation significative de l'attraction.Monochamus alternatus / composés / volatil des pins / piégeage / terpènes / attractif

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Antennal perception of oilseed rape,Brassica napus (Brassicaceae), volatiles by the cabbage seed weevilCeutorhynchus assimilis (Coleoptera, Curculionidae)

Cited by 120 publications

References 18 publications

Peripheral modulation of pheromone response by inhibitory host compound in a beetle

Peripheral modulation of pheromone response by inhibitory host compound in a beetle

Defence mechanisms of Brassicaceae: implications for plant-insect interactions and potential for integrated pest management. A review

Des composés émis par les arbres-hôtes stressés sont attractifs pour le cérambycidé Monochamus alternatus

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