| Fine structure of corpora allata of castes with different rates of juvenile hormone production in the termite Reticulitermes flavipes. | |
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MedLine Citation:
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PMID: 20727986 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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The aim of this work is to describe corpora allata (CA) of several castes of the termite Reticulitermes flavipes that have different rates of juvenile hormone (JH) synthesis, with respect to differences in fine structure, volume, and intensity of allatostatin immunoreactivity in their innervation. The castes chosen are workers and their potential derivatives, apterous secondary reproductives and pre-soldiers (the precursors of soldiers). These castes, at the stages chosen, produce JH at low, high and intermediate rates respectively. Hormone production is positively correlated with volume and negatively correlated with intensity of allatostatin immunoreactivity in axons within the glands. Characteristics of fine structure that correlate with increased activity are increase in abundance and width of mitochondria, decrease in ability to fix and visualize smooth endoplasmic reticulum. These features have previously been described for CA of cockroaches and other insects. Glycogen in the CA of all of the castes studied, especially the large amounts in highly active glands of physogastric apterous reproductive females, is the most striking difference between the CA cells of R. flavipes and previously described CA of cockroaches in which glycogen is absent throughout the reproductive cycles. This suggests that glycogen is an important source of energy for hormone production by termite CA. |
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Authors:
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Kuen K Chan; Dean S Abel; Barbara Stay |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2010-8-18 |
Journal Detail:
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Title: Arthropod structure & development Volume: - ISSN: 1873-5495 ISO Abbreviation: - Publication Date: 2010 Aug |
Date Detail:
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Created Date: 2010-8-23 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100972232 Medline TA: Arthropod Struct Dev Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2010. Published by Elsevier Ltd. |
Affiliation:
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Department of Biology, University of Iowa, Iowa City, Iowa 52242 USA. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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