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Ultrastructure and 3D reconstruction of the tun in Richtersius coronifer (Richters, 1903)
Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap. Kristianstad University, Research environment Man & Biosphere Health (MABH). Charles University, Prague.
Polen.
Kristianstad University, Research environment Man & Biosphere Health (MABH). Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap.ORCID iD: 0000-0002-1732-0372
Polen.
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2016 (English)Conference paper, Poster (Refereed)
Abstract [en]

Anhydrobiosis is one of the types of cryptobiosis that is caused by lack of water (desiccation). Formation of a tun seems to be the most important morphological adaptation for entering anhydrobiotic state. During this process the tardigrade body undergo anterior-posterior contraction that causes relocation of some organs such as the pharyngeal bulb. The tun wall of Richtersius coronifer (Eutardigrada,  Macrobiotidae) was composed of multilayered cuticle and epidermis. The epidermis consisted of the single squamous epithelium whose cells were shrunken whereas  the cuticle was composed of epi-, intra- and procuticle, flocculent coat and trilaminate layer. The storage cells of desiccated specimens filled up free inner space and surrounded the internal organs (ovary, digestive system) that were contracted. All cells of the body underwent shrinking and their metabolism was arrested. The cytoplasm of all cells was electron dense but the basic morphology of cells and organelles did not differ between active and anhydrobiotic animals. The structure and the ultrastructure of the desiccated Richtersius coronifer have been described with light and confocal microscopy as well as transmission and scanning electron microscopy. 3D reconstruction of tun based on the series of semi-thin sections was prepared with IMARIS 8.2 software (Bitplane).

Place, publisher, year, edition, pages
2016.
Keyword [sv]
björndjur, tardigrada
National Category
Zoology
Identifiers
URN: urn:nbn:se:hkr:diva-15944OAI: oai:DiVA.org:hkr-15944DiVA: diva2:958349
Conference
ARTHROPOD 2016 Conference, 1-3 July, University of Silesia, Katowice
Available from: 2016-09-06 Created: 2016-09-06 Last updated: 2016-10-12Bibliographically approved

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Jönsson, K. Ingemar
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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
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More styles
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  • en-GB
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