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MORPHOLOGICAL AND FUNCTIONAL ASPECTS OF AN INSECT EPIDERMAL GLAND
The sternal gland of primitive termites of the genus Zootermopsis (Z. nevadensis or Z. angusticollus) (Hagen) seems more organized than that of higher termites, in being comprised of three cell layers. It is also studded with about 200 campaniform sensilla. Below the meshwork cuticle of the gland li...
Autores principales: | , |
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Formato: | Texto |
Lenguaje: | English |
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The Rockefeller University Press
1968
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2107364/ https://www.ncbi.nlm.nih.gov/pubmed/5645546 |
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author | Stuart, A. M. Satir, P. |
author_facet | Stuart, A. M. Satir, P. |
author_sort | Stuart, A. M. |
collection | PubMed |
description | The sternal gland of primitive termites of the genus Zootermopsis (Z. nevadensis or Z. angusticollus) (Hagen) seems more organized than that of higher termites, in being comprised of three cell layers. It is also studded with about 200 campaniform sensilla. Below the meshwork cuticle of the gland lies a layer of columnar epithelial cells whose apical surfaces form a brush border, and whose basal surfaces are sculptured into a basketwork into which the second layer fits. Below the brush border are small microtubule-associated pits and coated vesicles. No channels can be seen either within or, except for the sensilla, between the cells. The second cell layer probably secretes the trail-following pheromone. Numerous electron-lucent droplets and large channels containing lipid micelles are found in the cytoplasm here, but the channels cannot be traced out of the secretory layer. The third layer consists of large pyriform cells. The campaniform sensilla are composed of three cells: the sensory cell proper whose dendrite carries a modified 9 + 0 sensory process, an accessory supporting cell that secretes an electron-opaque sheath, and an enveloping cell. At the cell borders of the sensillum, regions of septate and tight junction appear. There are also septate junctions between columnar cells and possibly tight junctions between columnar and secretory cells that would open an intracellular and molecular pathway to the endocuticle. The campaniform sensilla may be part of a feedback control system that determines the amount of pheromone deposited during trail laying. |
format | Text |
id | pubmed-2107364 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 1968 |
publisher | The Rockefeller University Press |
record_format | MEDLINE/PubMed |
spelling | pubmed-21073642008-05-01 MORPHOLOGICAL AND FUNCTIONAL ASPECTS OF AN INSECT EPIDERMAL GLAND Stuart, A. M. Satir, P. J Cell Biol Article The sternal gland of primitive termites of the genus Zootermopsis (Z. nevadensis or Z. angusticollus) (Hagen) seems more organized than that of higher termites, in being comprised of three cell layers. It is also studded with about 200 campaniform sensilla. Below the meshwork cuticle of the gland lies a layer of columnar epithelial cells whose apical surfaces form a brush border, and whose basal surfaces are sculptured into a basketwork into which the second layer fits. Below the brush border are small microtubule-associated pits and coated vesicles. No channels can be seen either within or, except for the sensilla, between the cells. The second cell layer probably secretes the trail-following pheromone. Numerous electron-lucent droplets and large channels containing lipid micelles are found in the cytoplasm here, but the channels cannot be traced out of the secretory layer. The third layer consists of large pyriform cells. The campaniform sensilla are composed of three cells: the sensory cell proper whose dendrite carries a modified 9 + 0 sensory process, an accessory supporting cell that secretes an electron-opaque sheath, and an enveloping cell. At the cell borders of the sensillum, regions of septate and tight junction appear. There are also septate junctions between columnar cells and possibly tight junctions between columnar and secretory cells that would open an intracellular and molecular pathway to the endocuticle. The campaniform sensilla may be part of a feedback control system that determines the amount of pheromone deposited during trail laying. The Rockefeller University Press 1968-03-01 /pmc/articles/PMC2107364/ /pubmed/5645546 Text en Copyright © 1968 by The Rockefeller University Press This article is distributed under the terms of an Attribution–Noncommercial–Share Alike–No Mirror Sites license for the first six months after the publication date (see http://www.rupress.org/terms). After six months it is available under a Creative Commons License (Attribution–Noncommercial–Share Alike 4.0 Unported license, as described at http://creativecommons.org/licenses/by-nc-sa/4.0/). |
spellingShingle | Article Stuart, A. M. Satir, P. MORPHOLOGICAL AND FUNCTIONAL ASPECTS OF AN INSECT EPIDERMAL GLAND |
title | MORPHOLOGICAL AND FUNCTIONAL ASPECTS OF AN INSECT EPIDERMAL GLAND |
title_full | MORPHOLOGICAL AND FUNCTIONAL ASPECTS OF AN INSECT EPIDERMAL GLAND |
title_fullStr | MORPHOLOGICAL AND FUNCTIONAL ASPECTS OF AN INSECT EPIDERMAL GLAND |
title_full_unstemmed | MORPHOLOGICAL AND FUNCTIONAL ASPECTS OF AN INSECT EPIDERMAL GLAND |
title_short | MORPHOLOGICAL AND FUNCTIONAL ASPECTS OF AN INSECT EPIDERMAL GLAND |
title_sort | morphological and functional aspects of an insect epidermal gland |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2107364/ https://www.ncbi.nlm.nih.gov/pubmed/5645546 |
work_keys_str_mv | AT stuartam morphologicalandfunctionalaspectsofaninsectepidermalgland AT satirp morphologicalandfunctionalaspectsofaninsectepidermalgland |