Novel antennal lobe substructures revealed in the small hive beetle Aethina tumida

Kollmann, Martin; Rupenthal, Anna Lena; Neumann, Peter; Huetteroth, Wolf; Schachtner, Joachim

doi:10.1007/s00441-015-2282-9

Cited by 12 publications

(23 citation statements)

References 123 publications

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“…In A . tumida , Kollmann et al [40] could identify about 80 TKRP-ir LNs confined to the AL and entering the substructures of the glomeruli, but did not observe TKRP-ir fibers in the antennal nerve (AN) (excluding TKRP-ir OSNs) or TKRP-ir PNs or CNs. Similarly, in this work, all animals with TKRP-ir substructures show TKRP-ir LNs entering the AL glomeruli but a lack of TKRP-immunoreactivity in the AN and in the AL output tracts (PN axons).…”

Section: Resultsmentioning

confidence: 99%

“…We investigated the AL of 63 beetle species from 22 different families, thus providing the most exhaustive dataset on AL neuroarchitecture within an insect order to date. Glomeruli numbers were obtained for 32 of the examined beetle species, reaching from 50 to 150 glomeruli (with 80 to 120 glomeruli in the majority of animals) and revealing much more diversity than would be expected from existing studies within Coleoptera [34,37–40]. The observed neuroanatomical diversity of coleopteran AL organization also includes several species with numerous small glomeruli (comparable to the situation in acridid grasshoppers and diving beetles) and AL substructures recently described for the small hive beetle, Aethina tumida [40].…”

Section: Introductionmentioning

confidence: 81%

“…tumida that were evenly distributed across all glomeruli and innervated by TKRP-ir LN [40]. The glomerular substructures were also unmasked by anti-synapsin immunostaining that revealed a slightly higher synapsin density in the substructures compared to the surrounding glomerular neuropil [40]. The authors speculated that such a specialized organization may reflect a need to better handle the complex olfactory coding in a beehive in which these animals live as parasites.…”

Section: Discussionmentioning

confidence: 99%

“…Detailed information on the ALs of Coleoptera is scarce [21]—only the ALs of the scarab beetle Holotrichia diomphalia [37], of the red flour beetle Tribolium castaneum [34,38,39], and of the small hive beetle Aethina tumida [40] have been investigated in greater detail. Exhibiting 60–90 spherical glomeruli, the ALs in these species conform to the basic bauplan of a typical insect AL [21].…”

Section: Introductionmentioning

confidence: 99%

“…Recent investigations in A . tumida , using antibodies against TKRP, a neuropeptide known to modulate olfactory sensitivity and locomotor activity in the fruit fly Drosophila melanogaster [46–49] and the cockroach Periplaneta americana [50], revealed hitherto undescribed substructures within the olfactory glomeruli [40]. …”

Section: Introductionmentioning

confidence: 99%

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Variations on a Theme: Antennal Lobe Architecture across Coleoptera

et al. 2016

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Beetles comprise about 400,000 described species, nearly one third of all known animal species. The enormous success of the order Coleoptera is reflected by a rich diversity of lifestyles, behaviors, morphological, and physiological adaptions. All these evolutionary adaptions that have been driven by a variety of parameters over the last about 300 million years, make the Coleoptera an ideal field to study the evolution of the brain on the interface between the basic bauplan of the insect brain and the adaptions that occurred. In the current study we concentrated on the paired antennal lobes (AL), the part of the brain that is typically responsible for the first processing of olfactory information collected from olfactory sensilla on antenna and mouthparts. We analyzed 63 beetle species from 22 different families and thus provide an extensive comparison of principal neuroarchitecture of the AL. On the examined anatomical level, we found a broad diversity including AL containing a wide range of glomeruli numbers reaching from 50 to 150 glomeruli and several species with numerous small glomeruli, resembling the microglomerular design described in acridid grasshoppers and diving beetles, and substructures within the glomeruli that have to date only been described for the small hive beetle, Aethina tumida. A first comparison of the various anatomical features of the AL with available descriptions of lifestyle and behaviors did so far not reveal useful correlations. In summary, the current study provides a solid basis for further studies to unravel mechanisms that are basic to evolutionary adaptions of the insect olfactory system.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 81%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Variations on a Theme: Antennal Lobe Architecture across Coleoptera

et al. 2016

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Anatomical organization of the brain of a diurnal and a nocturnal dung beetle

Immonen

Dacke

Heinze

et al. 2017

J of Comparative Neurology

153

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To avoid the fierce competition for food, South African ball-rolling dung beetles carve a piece 4 of dung off a dung-pile, shape it into a ball and roll it away along a straight line path. For this 5 unidirectional exit from the busy dung pile, at night and day, the beetles use a wide repertoire 6 of celestial compass cues. This robust and relatively easily measurable orientation behavior has 7 made ball-rolling dung beetles an attractive model organism for the study of the neuroethology 8 behind insect orientation and sensory ecology. Although there is already some knowledge 9 emerging concerning how celestial cues are processed in the dung beetle brain, little is known 10 about its general neural layout. Mapping the neuropils of the dung beetle brain is thus a 11 prerequisite to understand the neuronal network that underlies celestial compass orientation. 12Here, we describe and compare the brains of a day-active and a night-active dung beetle species 13 based on immunostainings against synapsin and serotonin. We also provide 3D reconstructions 14 for all brain areas and many of the fiber bundles in the brain of the day-active dung beetle. 15Comparison of neuropil structures between the two dung beetle species revealed differences 16 that reflect adaptations to different light conditions. Altogether, our results provide a reference 17 framework for future studies on the neuroethology of insects in general and dung beetles in

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Distribution of tachykinin‐related peptides in the brain of the tobacco budworm Heliothis virescens

Zhao

Xie

Berg

et al. 2017

J of Comparative Neurology

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Invertebrate tachykinin-related peptides (TKRPs) comprise a group of signaling molecules having sequence similarities to mammalian tachykinins. A growing body of evidence has demonstrated the presence of TKRPs in the central nervous system of insects. In this investigation, we used an antiserum against locustatachykinin-II to reveal the distribution pattern of these peptides in the brain of the moth Heliothis virescens. Immunolabeling was found throughout the brain of the heliothine moth. Most of the roughly 500 locustatachykinin-II immunoreactive cell bodies, that is, ca. 400, were located in the protocerebrum, whereas the rest was distributed in the deutocerebrum, tritocerebrum, and the gnathal ganglion. Abundant immunoreactive processes were located in the same regions. Labeled processes in the protocerebrum were especially localized in optic lobe, central body, lateral accessory lobe, superior protocerebrum, and lateral protocerebrum, while those in the deutocerebrum were present exclusively in the antennal lobe. In addition to brain interneurons, four pairs of median neurosecretory cells in the pars intercerebralis with terminal processes in the corpora cardiaca and aorta wall were immunostained. No sexual dimorphism in immunoreactivity was found. Comparing the data obtained here with findings from other insect species reveals considerable differences, suggesting species-specific roles of tachykinin-related peptides in insects.

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Novel antennal lobe substructures revealed in the small hive beetle Aethina tumida

Cited by 12 publications

References 123 publications

Variations on a Theme: Antennal Lobe Architecture across Coleoptera

Variations on a Theme: Antennal Lobe Architecture across Coleoptera

Anatomical organization of the brain of a diurnal and a nocturnal dung beetle

Distribution of tachykinin‐related peptides in the brain of the tobacco budworm Heliothis virescens

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