Mechanosensitive and Olfactory Sensilla of Insects

Keil, Thomas A.; Steinbrecht, Rudolf Alexander

doi:10.1007/978-1-4613-2715-8_13

Cited by 209 publications

(185 citation statements)

References 119 publications

(159 reference statements)

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“…They have the typical appearance of mechanoreceptors and this is supported by their fine structure, a single sensory neurone whose dendrite ends in a tubular body at the base of a thickwalled hair (McIver, 1975;Keil & Steinbrecht, 1984). The morphology of these sensilla closely resembles sensilla chaetica found on other cecidomyiid species (Slifer & Sekhon, 1971;Solinas & Nuzzaci, 1987).…”

Section: Discussionmentioning

confidence: 80%

Olfactory responses and sensilla morphology of the blackcurrant leaf midge Dasineura tetensi

Crook

Mordue

1999

Entomologia Exp Applicata

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Olfactory responses of Dasineura tetensi (Rubs) (Diptera; Cecidomyiidae) to leaf volatiles of blackcurrant (Ribes nigrum) were tested in a 4-way olfactometer. Newly emerged virgin females showed no response to the leaf volatiles emitted from a blackcurrant shoot. Newly emerged males (which are known to respond to a pheromone released by the female) also showed no response to the leaf volatiles. Two hours after mating females responded positively, indicating that leaf volatiles may play a role in host plant finding. Scanning (SEM) and transmission (TEM) electron microscopy of the antennae of D. tetensi showed that males and females share five sensillum types; sensilla chaetica (mechanoreceptors), sensilla trichodea, sensilla basiconica, uniporous peg sensilla and circumfila (chemoreceptors). The sensilla chaetica and sensilla trichodea resemble those found on other insects. Sensilla basiconica were found on all antennal subsegments except the tip. These are multiporous receptors with five unbranched dendrites filling the lumen. Small peg sensilla located on the tips of both male and female antennae may function as contact-chemoreceptors. The circumfila, which are a unique type of sensilla found only on cecidomyiid antennae, form loops around each of the antennal subsegments, being attached to the surface by a series of stalks. TEM revealed that each stalk consisted of one sensillum containing a single highly branched dendrite. The distal regions of the walls of each sensillum are fused together to form the circumfila. Circumfila have multiporous walls and a lumen filled with multiple branches of dendrites. Their structure suggests that they are important olfactory receptors in both the male and female.

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Section: Discussionmentioning

confidence: 80%

Olfactory responses and sensilla morphology of the blackcurrant leaf midge Dasineura tetensi

Crook

Mordue

1999

Entomologia Exp Applicata

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“…Basiconic sensilla can be distinguished from trichoid sensilla in that they (1) are shorter; (2) have a thinner cuticular wall that is pitted by a higher density of pores; (3) have a larger number of pore tubules associated with each pore; and (4) have many distal dendritic branches (Keil and Steinbrecht, 1984).…”

Section: Types-a and -B Basiconic Sensillamentioning

confidence: 99%

Recent advances in insect olfaction, specifically regarding the morphology and sensory physiology of antennal sensilla of the female sphinx moth Manduca sexta

Shields

Hildebrand²

2001

Microscopy Res & Technique

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The antennal flagellum of female Manduca sexta bears eight sensillum types: two trichoid, two basiconic, one auriculate, two coeloconic, and one styliform complex sensilla. The first type of trichoid sensillum averages 34 μm in length and is innervated by two sensory cells. The second type averages 26 μm in length and is innervated by either one or three sensory cells. The first type of basiconic sensillum averages 22 μm in length, while the second type averages 15 μm in length. Both types are innervated by three bipolar sensory cells. The auriculate sensillum averages 4 μm in length and is innervated by two bipolar sensory cells. The coeloconic type-A and type-B both average 2 μm in length. The former type is innervated by five bipolar sensory cells, while the latter type, by three bipolar sensory cells. The styliform complex sensillum occurs singly on each annulus and averages 38-40 μm in length. It is formed by several contiguous sensilla. Each unit is innervated by three bipolar sensory cells. A total of 2,216 sensilla were found on a single annulus (annulus 21) of the flagellum. Electrophysiological responses from type-A trichoid sensilla to a large panel of volatile odorants revealed three different subsets of olfactory receptor cells (ORCs). Two subsets responded strongly to only a narrow range of odorants, while the third responded strongly to a broad range of odorants. Anterograde labeling of ORCs from type-A trichoid sensilla revealed that their axons projected mainly to two large female glomeruli of the antennal lobe.

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“…Thurm (1964) showed that the cuticle at the base of each sensillum of the honey bee hair plate is elastic and stains positively with methylene blue, one of Weis-Fogh's (1960) diagnostic characteristics for identification of resilin. Subsequently, transmission electron microscopy has shown that the flexible socket cuticle, termed the joint membrane, is composed of a homogeneous material, possibly resilin (Matsumoto and Farley, 1978;Keil and Steinbrecht, 1984;Keil, 1997), embedded in a matrix of fibrous cuticle. Touch sensilla are likely to undergo many repeated deflections in an insect's lifetime.…”

Section: Resilin Expression In Developing Touch Receptorsmentioning

confidence: 99%

Expression of the rubber‐like protein, resilin, in developing and functional insect cuticle determined using a Drosophila anti‐rec 1 resilin antibody

Wong

Pearson

Elvin

et al. 2012

Developmental Dynamics

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Background: The natural elastomeric protein, insect resilin, is the most efficient elastic material known, used to store energy for jumping and flight in a variety of insects. Here, an antibody to recombinant Drosophila melanogaster pro-resilin is used to examine resilin expression in Drosophila and a wider range of insects. Results: Immunostaining of Drosophila embryos reveals anti-resilin reactivity in epidermal patches that exhibit a dynamic spatial and temporal expression through late embryogenesis. Resilin is also detected in stretch receptors in the embryo. In developing adult Drosophila, resilin pads are described at the base of wings and at the base of flexible sensory hairs in pupae. Resilin is also detected in embryos of the tephritid fruitfly, Bactrocera tryoni, and two well-known concentrations of insect resilin: the flight muscle tendon of the dragonfly and the pleural arch of the flea. Conclusions: The antiRec1 antibody antibody developed using Drosophila pro-resilin as antigen is cross-reactive and is useful for detection of resilin in diverse insects. For the first time, resilin expression has been detected during embryogenesis, revealing segmental patches of resilin in the developing epidermis of Drosophila. Developmental Dynamics 241:333-339,

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Mechanosensitive and Olfactory Sensilla of Insects

Cited by 209 publications

References 119 publications

Olfactory responses and sensilla morphology of the blackcurrant leaf midge Dasineura tetensi

Olfactory responses and sensilla morphology of the blackcurrant leaf midge Dasineura tetensi

Recent advances in insect olfaction, specifically regarding the morphology and sensory physiology of antennal sensilla of the female sphinx moth Manduca sexta

Expression of the rubber‐like protein, resilin, in developing and functional insect cuticle determined using a Drosophila anti‐rec 1 resilin antibody

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