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The structure of the desiccated Richtersius coronifer (Richters, 1903)
Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap. Högskolan Kristianstad, Forskningsmiljön Man & Biosphere Health (MABH). Tjeckien.
Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap. Högskolan Kristianstad, Forskningsmiljön Man & Biosphere Health (MABH).ORCID-id: 0000-0002-1732-0372
Polen.
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Vise andre og tillknytning
2017 (engelsk)Inngår i: Protoplasma, ISSN 0033-183X, E-ISSN 1615-6102, Vol. 254, nr 3, s. 1367-1377Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Tun formation is an essential morphological adaptation for entering the anhydrobiotic state in tardigrades, but its internal structure has rarely been investigated. We present the structure and ultrastructure of organs and cells in desiccated Richtersius coronifer by transmission and scanning electron microscopy, confocal microscopy, and histochemical methods. A 3D reconstruction of the body organization of the tun stage is also presented. The tun formation during anhydrobiosis of tardigrades is a process of anterior-posterior body contraction, which relocates some organs such as the pharyngeal bulb. The cuticle is composed of epicuticle, intracuticle and procuticle; flocculent coat; and trilaminate layer. Moulting does not seem to restrict the tun formation, as evidenced from tardigrade tuns that were in the process of moulting. The storage cells of desiccated specimens filled up the free inner space and surrounded internal organs, such as the ovary and digestive system, which were contracted. All cells (epidermal cells, storage cells, ovary cells, cells of the digestive system) underwent shrinkage, and their cytoplasm was electron dense. Lipids and polysaccharides dominated among reserve material of storage cells, while the amount of protein was small. The basic morphology of specific cell types and organelles did not differ between active and anhydrobiotic R. coronifer.

sted, utgiver, år, opplag, sider
2017. Vol. 254, nr 3, s. 1367-1377
Emneord [en]
Anhydrobiosis; Cryptobiosis; Tardigrades; Tun; Ultrastructure
HSV kategori
Identifikatorer
URN: urn:nbn:se:hkr:diva-16105DOI: 10.1007/s00709-016-1027-2ISI: 000399037400020PubMedID: 27677802OAI: oai:DiVA.org:hkr-16105DiVA, id: diva2:989356
Tilgjengelig fra: 2016-09-29 Laget: 2016-09-29 Sist oppdatert: 2017-06-19bibliografisk kontrollert

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