Sexual dimorphism in neuronal projections from the antennae of silk moths (Bombyx mori, Antheraea polyphemus) and the gypsy moth (Lymantria dispar)

Koontz, Margaret A.; Schneider, Dietrich

doi:10.1007/bf00215416

Cited by 101 publications

(96 citation statements)

References 39 publications

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“…In B. mori, fibers from anterior branches (corresponding to the medial nerve) in the antennae are topographically biased towards the medial MGC, while fibers from posterior branches (corresponding to the lateral nerve) are biased towards the lateral MGC, as shown by forward-filling from some sensory hairs (Koontz and Schneider, 1987). We could also demonstrate the difference between the 3-D projection pattern of the MN or the LN by confocal microscopic observation.…”

Section: Projection Of Sensory Fibers From the Mn And The Lnmentioning

confidence: 63%

“…However, there is a possibility of recording not only the signal in the MGC but also the signal of these thick fibers because we could not recognize the range in depth to acquire the optical recording. These thick fibers terminate in the AMMC and not in the MGC or the posterior region of the MGC (Koontz and Schneider, 1987). This suggests that postsynaptic responses blocked under Ca 2+ -free conditions originate purely from the MGC and not from the thick fibers.…”

Section: Pathwaymentioning

confidence: 91%

“…In B. mori, the antennal nerve (AN) bifurcates into the medial nerve (MN) and the lateral nerve (LN; Koontz and Schneider, 1987). In the present study, these two distinct pathways from the antennae to the MGC were characterized by optical recording in order to understand the functional synaptic organization of topological information through the sensory fibers of the AN to the MGC.…”

mentioning

confidence: 97%

“…Topographic projections from the sensory epithelium into the olfactory bulb in vertebrates (Jastreboff et al, 1984;Pederson et al, 1986;Shepherd, 1993;Schoenfeld et al, 1994) and from the antenna into the antennal lobe (AL) in invertebrates (Koontz and Schneider, 1987;Christensen et al, 1994) have been demonstrated. The AL is the primary olfactory center in the insect brain.…”

mentioning

confidence: 99%

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Modular organization of the silkmoth antennal lobe macroglomerular complex revealed by voltage-sensitive dye imaging

Kanzaki

2004

Journal of Experimental Biology

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Section: Projection Of Sensory Fibers From the Mn And The Lnmentioning

confidence: 63%

Section: Pathwaymentioning

confidence: 91%

mentioning

confidence: 97%

mentioning

confidence: 99%

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Modular organization of the silkmoth antennal lobe macroglomerular complex revealed by voltage-sensitive dye imaging

Kanzaki

2004

Journal of Experimental Biology

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“…Whereas sensory afferents from sensilla on the dorsal and ventral surfaces of the antenna are generally intermingled in ordinary glomeruli, those from the two antennal surfaces are biased toward the anterior and posterior regions in the MGC [11,12]. Similar topographic organization is also found in the MGC of male sphinx moths [3], silk moths [1], and gypsy moths [8]. Differential labeling of the two antennal nerves enables precise tracing of afferents in the developing MGC.…”

Section: Abstract (Within 250 Words)mentioning

confidence: 83%

Different growth patterns of two adjacent glomeruli responsible for sex-pheromone processing during postembryonic development of the cockroach Periplaneta americana

Nishino

Yoritsune

Mizunami

2009

Neuroscience Letters

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In many insect species, sex pheromone is processed by specific, enlarged glomeruli in the antennal lobes of males. In the male American cockroach, two closely located glomeruli (A and B) are responsible for processing the major pheromone components (periplanone-A and -B, respectively), and these collectively form the macroglomerular complex. Afferents originating from the dorsal and ventral surfaces of the antenna tend to project to the anterior and posterior regions of the macroglomerular complex via the dorsal and ventral antennal nerves, respectively. This topographic segregation of afferents is seen only in the macroglomerular complex, and not in other glomeruli that process normal environmental odors. Using differential, anterograde dye injection into the two antennal sensory nerves, we show that the macroglomerular complex is not formed by fusion of several glomeruli, as suggested in previous studies. but that the precursors of the A- and B-glomeruli already exist in the first larval instar. The volume of afferents in the macroglomerular complex precursor increases nearly exponentially with molting times. 430-fold from the first instar to the adult. The A- and B-glomeruli both undergo continuous growth during postembryonic development, but peak growth rates occur in different larval stages. The growth rate of the B-glomerulus peaked in the mid-developmental stage then declined, while growth of A-glomerulus was maintained at low level in early- to mid-developmental stages but increased greatly in later stages. These results suggest perception of sex pheromone occurs in early instars, and that PA and PB have distinct roles in different developmental stages

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Early formation of sexually dimorphic glomeruli in the developing olfactory lobe of the brain of the mothManduca sexta

1998

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The antennal lobes (ALs), the primary olfactory centers, of the moth Manduca sexta are sexually dimorphic. Only ALs of males possess the macroglomerular complex (MGC), the site of primary processing of information about the female's sex pheromone. To understand the development of identified, odor-specific olfactory glomeruli, we investigated the cellular events involved in the morphogenesis of the MGC by means of various fluorescence staining techniques and laser-scanning confocal microscopy. The MGC lies near the entrance of the antennal nerve into the AL of the adult male and comprises three glomeruli, the globular cumulus and two toroidal structures. The MGC forms during early stages of metamorphic adult development through a stereotyped sequence of coordinated changes in MGC-specific receptor axons, glial cells, and early-ingrowing projection neurons of the medial group of AL neurons. The MGC divisions are the earliest glomeruli to form in the male AL, and their basic organization is established within about 3 days after ingrowth of the first sensory axons. Despite their special anatomical features, the MGC glomeruli develop in a manner similar to that of the ordinary glomeruli. Comparison of the ALs of males and females reveals that two relatively large and early-developing glomeruli that are situated dorsolaterally in the female AL appear to be female-specific. Development of the sexually dimorphic glomeruli diverges immediately after the ingrowth of the first olfactory receptor axons, resulting in the formation of these large glomeruli in females and the MGC in males.

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Sexual dimorphism in neuronal projections from the antennae of silk moths (Bombyx mori, Antheraea polyphemus) and the gypsy moth (Lymantria dispar)

Cited by 101 publications

References 39 publications

Modular organization of the silkmoth antennal lobe macroglomerular complex revealed by voltage-sensitive dye imaging

Modular organization of the silkmoth antennal lobe macroglomerular complex revealed by voltage-sensitive dye imaging

Different growth patterns of two adjacent glomeruli responsible for sex-pheromone processing during postembryonic development of the cockroach Periplaneta americana

Early formation of sexually dimorphic glomeruli in the developing olfactory lobe of the brain of the mothManduca sexta

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