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Neuronal architecture of the second-order CO(2) pathway in the brain of a noctuid moth

Many insects possess the ability to detect fine fluctuations in the environmental CO(2) concentration. In herbivorous species, plant-emitted CO(2), in combination with other sensory cues, affect many behaviors including foraging and oviposition. In contrast to the comprehensive knowledge obtained on...

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Autores principales: Chu, X., KC, P., Ian, E., Kvello, P., Liu, Y., Wang, G. R., Berg, B. G.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7669840/
https://www.ncbi.nlm.nih.gov/pubmed/33199810
http://dx.doi.org/10.1038/s41598-020-76918-1
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author Chu, X.
KC, P.
Ian, E.
Kvello, P.
Liu, Y.
Wang, G. R.
Berg, B. G.
author_facet Chu, X.
KC, P.
Ian, E.
Kvello, P.
Liu, Y.
Wang, G. R.
Berg, B. G.
author_sort Chu, X.
collection PubMed
description Many insects possess the ability to detect fine fluctuations in the environmental CO(2) concentration. In herbivorous species, plant-emitted CO(2), in combination with other sensory cues, affect many behaviors including foraging and oviposition. In contrast to the comprehensive knowledge obtained on the insect olfactory pathway in recent years, we still know little about the central CO(2) system. By utilizing intracellular labeling and mass staining, we report the neuroanatomy of projection neurons connected with the CO(2) sensitive antennal-lobe glomerulus, the labial pit organ glomerulus (LPOG), in the noctuid moth, Helicoverpa armigera. We identified 15 individual LPOG projection neurons passing along different tracts. Most of these uniglomerular neurons terminated in the lateral horn, a previously well-described target area of plant-odor projection neurons originating from the numerous ordinary antennal-lobe glomeruli. The other higher-order processing area for odor information, the calyces, on the other hand, was weakly innervated by the LPOG neurons. The overlapping LPOG terminals in the lateral horn, which is considered important for innate behavior in insects, suggests the biological importance of integrating the CO(2) input with plant odor information while the weak innervation of the calyces indicates the insignificance of this ubiquitous cue for learning mechanisms.
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spelling pubmed-76698402020-11-18 Neuronal architecture of the second-order CO(2) pathway in the brain of a noctuid moth Chu, X. KC, P. Ian, E. Kvello, P. Liu, Y. Wang, G. R. Berg, B. G. Sci Rep Article Many insects possess the ability to detect fine fluctuations in the environmental CO(2) concentration. In herbivorous species, plant-emitted CO(2), in combination with other sensory cues, affect many behaviors including foraging and oviposition. In contrast to the comprehensive knowledge obtained on the insect olfactory pathway in recent years, we still know little about the central CO(2) system. By utilizing intracellular labeling and mass staining, we report the neuroanatomy of projection neurons connected with the CO(2) sensitive antennal-lobe glomerulus, the labial pit organ glomerulus (LPOG), in the noctuid moth, Helicoverpa armigera. We identified 15 individual LPOG projection neurons passing along different tracts. Most of these uniglomerular neurons terminated in the lateral horn, a previously well-described target area of plant-odor projection neurons originating from the numerous ordinary antennal-lobe glomeruli. The other higher-order processing area for odor information, the calyces, on the other hand, was weakly innervated by the LPOG neurons. The overlapping LPOG terminals in the lateral horn, which is considered important for innate behavior in insects, suggests the biological importance of integrating the CO(2) input with plant odor information while the weak innervation of the calyces indicates the insignificance of this ubiquitous cue for learning mechanisms. Nature Publishing Group UK 2020-11-16 /pmc/articles/PMC7669840/ /pubmed/33199810 http://dx.doi.org/10.1038/s41598-020-76918-1 Text en © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Chu, X.
KC, P.
Ian, E.
Kvello, P.
Liu, Y.
Wang, G. R.
Berg, B. G.
Neuronal architecture of the second-order CO(2) pathway in the brain of a noctuid moth
title Neuronal architecture of the second-order CO(2) pathway in the brain of a noctuid moth
title_full Neuronal architecture of the second-order CO(2) pathway in the brain of a noctuid moth
title_fullStr Neuronal architecture of the second-order CO(2) pathway in the brain of a noctuid moth
title_full_unstemmed Neuronal architecture of the second-order CO(2) pathway in the brain of a noctuid moth
title_short Neuronal architecture of the second-order CO(2) pathway in the brain of a noctuid moth
title_sort neuronal architecture of the second-order co(2) pathway in the brain of a noctuid moth
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7669840/
https://www.ncbi.nlm.nih.gov/pubmed/33199810
http://dx.doi.org/10.1038/s41598-020-76918-1
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