Sensitivity of the Contact Chemoreceptors of the Blowfly to Vapors

Dethier, V. G.

doi:10.1073/pnas.69.8.2189

Cited by 67 publications

(34 citation statements)

References 8 publications

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“…Discussion in Hanson and Dethier, 1973;Slifer, 1970). However, the behavioural observations cited by Slifer (1970), the physiological study of Dethier (1972) and now our own results show that such classification on the basis of these morphological distinctions do not always apply. Future studies using implanted electrodes in the wall or the base of the sensilla are likely to reveal more examples of vapor phase sensitivity of typical contact chemoreceptors.…”

Section: Resultsmentioning

confidence: 57%

“…Contact chemoreceptors have been shown to be sensitive to vapors in the blowfly, Phormia regina (Dethier, 1972); however, these responses occurred upon stimulation by vapors that could only be characterized as non-physiological (vapors of concentrated acids and nonpolar organic compounds). The question of whether natural stimuli might also elicit such an olfactory response, and thus be of possible use to an animal in its normal activity, remained unanswered.…”

Section: Introductionmentioning

confidence: 98%

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Olfactory capabilities of the ?gustatory? chemoreceptors of the tobacco hornworm larvae

Städler

Hanson

1975

J. Comp. Physiol.

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Summary. Gustatory chemoreceptors on the maxillae of Manduca sexta responded to natural stimuli from distances of up to 600 y.m (average is 100 ~xm). In the lateral sensilla styloconica, at least three of the four known chemoreceptive ceils responded, indicating that different compounds could be involved in the stimulus. The medial sensilla did not show a comparable olfactory capability. Thus, chemoreceptors classed as contact receptors on a morphological basis (thick walls, single apical pore) were responsive to vapors of normal food substances. Adaptation of the receptor was observed prior to contact with the stimulus. This has important implications for experiments on gustatory receptors.

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Section: Resultsmentioning

confidence: 57%

Section: Introductionmentioning

confidence: 98%

Olfactory capabilities of the ?gustatory? chemoreceptors of the tobacco hornworm larvae

Städler

Hanson

1975

J. Comp. Physiol.

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“…The disadvantages of the technique are the following : (i) the nerve cell activity is recorded only during contact, which means that background activity before and after effects (rebound inhibition) following the removal of the stimulus can not be recorded; (ii) at the beginning of the recording artifacts can block the amplifier and, as a consequence, the first 100 ms or more of the recording may be lost. The first 100 ms of stimulation may contain enough information to trigger an adequate behavioral response (Dethier, 1968); (iii) the stimulating compounds have to be in a water phase, a serious limitation for the study of nonpolar chemicals (Blaney, 1974;Dethier, 1972); and (iv) both electrolytes and non-electrolytes influence the electrical conductivity of the stimulating and recording solution (Wolbarsht, 1958). This may result in a change in the amplitude of the nerve impulses which is a typical criterion for their identification (see examples in Fig.…”

Section: Electrophysiologymentioning

confidence: 99%

Contact Chemoreception

Städler¹

1984

Chemical Ecology of Insects

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“…Dethier [31] also found that chemoreceptors on the mouthparts and legs of the blowfly Phorinia regina that normally respond to aqueous solutions also respond to organic and inorganic acids, and various nonpolar compounds in gaseous state. It is possible that in mosquitoes, the more proximally located medium-sized hairs which do not normally come into contact with the substrate may respond to vapors.…”

Section: Medium-sized Hairsmentioning

confidence: 99%

Fine Structure of the Sense Organs on the Labella and Labium of the Mosquito Aedes aegypti (L.)

Lee¹,

Craig²

2009

TOENTOJ

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Fine structure of the sense organs on the labella and labium of male and female mosquito Aedes aegypti is described. Labellar hair on the outside of the two labellar lobes are consisted of long mechanoreceptive hairs, medium-sized chemoreceptive hairs containing 3-5 dendrites, and short papillae which are probably olfactory receptors. Two apical hairs each containing five dendrites not reported before are found deeply embedded inside each labellum. They emerged between folds at the tip of the labellum. These and other sensory hairs on the outside of the labella are probably involved in finding a suitable place for feeding after a mosquito has landed on a host. Six anteriorly directed papillae each containing 3-5 dendrites are found on the oral surface of each labellar lobe with no evidence of mechanoreceptors associated with these papillae. These papilla are probably chemosensory and are involved in detecting the food entering the food canal when a mosquito feed on water and other liquid diet such as nectar. A chordotonal organ with two sensory cells is found inside each labellum, and this organ has not been described on mosquito mouthparts before. These chordotonal organs probably function to monitor the spreading and closing of the labellar lobes during feeding. Mosquito spread their labellar lobes when feeding on water and sugar but these lobes are firmly pressed against each other when they feed on blood. Ligular hairs are definitely not sensory because of a lack any dendrites inside these hairs. Labial hairs proximal to the labella are probably mechanoreceptors because only one nerve cell is associated with each hair with nerve terminating at the base of the hair. Based on results from behavioral and functional studies, the function of these sensilla during feeding is described.

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Sensitivity of the Contact Chemoreceptors of the Blowfly to Vapors

Abstract: Contact chemoreceptors on the mouthparts and legs of the blowfly Phormia regina that normally respond to

Cited by 67 publications

References 8 publications

Olfactory capabilities of the ?gustatory? chemoreceptors of the tobacco hornworm larvae

Olfactory capabilities of the ?gustatory? chemoreceptors of the tobacco hornworm larvae

Contact Chemoreception

Fine Structure of the Sense Organs on the Labella and Labium of the Mosquito Aedes aegypti (L.)

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