Der Feinbau olfaktorischer Sensillen des Seidenspinners (Insecta, Lepidoptera)

Steinbrecht, Rudolf Alexander

doi:10.1007/bf02028392

Cited by 154 publications

(51 citation statements)

References 27 publications

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“…The fine structure of the basiconic sensilla of female M. sexta most closely resembles that of the large basiconic sensilla of female and male B. mori (Steinbrecht, 1973(Steinbrecht, ,1980Steinbrecht and Gnatzy, 1984), males of M. sexta (Keil, 1989;Lee and Strausfeld, 1990), A. polyphemus (Keil, 1984a), A. pernyi (Keil, 1984a), and Y. vigintipunctatus and A. orana (Cuperus, 1985a).…”

Section: Types-a and -B Basiconic Sensillamentioning

confidence: 75%

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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Section: Types-a and -B Basiconic Sensillamentioning

confidence: 75%

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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“…Structures similar to the pore tubules, the wax canal filaments, are widespread among insect cuticles. Because of their abundance in secreting or resorbing cuticles (for references see Steinbrecht, 1973), transport function has been proposed for these structures too (Locke, 1965).…”

Section: The Pheromone-sensitive Sensilla Of Bombyxmentioning

confidence: 99%

“…If, on the other hand, the low frequency of contacts between pore tubules and dendrites (see above) is not merely a preparatory artifact, two possible pathways of stimulus transport have to be considered: (1) the pheromone molecules arriving at the dead end of a pore tubule move back and invade other pore tubules or (2) they pass into the receptorlymph to reach the dendrites (Steinbrecht, 1973). At first sight, crossing the phase border between the lipophilic pore tubule and the aqueous receptorlymph appears difficult for a lipophilic molecule such as bombykol, but this might be facilitated by the macromolecules contained within the receptorlymph (see Section 3.4).…”

Section: The Pheromone-sensitive Sensilla Of Bombyxmentioning

confidence: 99%

“…Using this value for both, the diffusion on the hair surface as well as along the pore tubules, and substituting the morphometric data of the sensillum, Steinbrecht (1973) calculated the diffusion time of a stimulus molecule from its first impact on the hair surface until it reaches the end of a pore tubule as shorter than 5 msec in most hair regions. Thus, stimulus transport by diffusion would be fast enough if most pore tubules would contact the dendrite in vivo; the comparatively long latency of the receptors (>50 msec; Kaissling, 1974) then would be caused by other rate-limiting processes in stimulus transduction.…”

Section: The Pheromone-sensitive Sensilla Of Bombyxmentioning

confidence: 99%

“…The number, distribution, and fine structure of the pores in Bombyx have been described in detail by Steinbrecht (1973;see also Figures 2b, 14a,b):…”

Section: The Pheromone-sensitive Sensilla Of Bombyxmentioning

confidence: 99%

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