Glycogen storage in the Riftia pachyptila trophosome: contribution of host and symbionts

Glycogen storage in host tissue and symbiotic bacteria in the anterior trophosome of the vestimentiferan tubeworm Riftia pachyptila Jones, 1981, was investigated using transmission electron microscope and stereological methods. The relative glycogen content (RGC) of each partner was calculated from...

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Bibliographic Details
Published in:Marine ecology. Progress series (Halstenbek) 2002-04, Vol.231, p.115-120
Main Authors: SORGO, Angelika, GAILL, Francoise, LECHAIRE, Jean-Pierre, ARNDT, Cordelia, BRIGHT, Monika
Format: Article
Language:English
Subjects:
Algae
Animal and plant ecology
Animal, plant and microbial ecology
Animals
Autoecology
Bacteria
Biological and medical sciences
Fundamental and applied biological sciences. Psychology
glycogen
Marine
Plant cytology, morphology, systematics, chorology and evolution
Protozoa. Invertebrata
Riftia pachyptila
Thallophyta
trophosomes
Vestimentifera
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Summary:Glycogen storage in host tissue and symbiotic bacteria in the anterior trophosome of the vestimentiferan tubeworm Riftia pachyptila Jones, 1981, was investigated using transmission electron microscope and stereological methods. The relative glycogen content (RGC) of each partner was calculated from the percentage of host and bacterial cytoplasm area taken up by glycogen and from the percentage area that host and symbionts occupy within a trophosome lobule section. Our results show that host and symbionts contribute equally to the total glycogen content of the trophosome; this ratio remains similar for up to 40 h of hypoxia. Furthermore, there is a glycogen gradient in the lobule. In both symbiotic partners, the glycogen content increased from the lobule center toward the periphery, implying different metabolic activities of host cells and bacteria depending on their location within a trophosome lobule.
ISSN:0171-8630
1616-1599
DOI:10.3354/meps231115