Notes on the ultrastructure of two myxosporean (Myxozoa) species, Zschokkella pleomorpha and Ortholinea fluviatilis

Title:

Notes on the ultrastructure of two myxosporean (Myxozoa) species, Zschokkella pleomorpha and Ortholinea fluviatilis

Creator:

Lom, Jiří and Dyková, Iva

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:6a4f5799-c1c6-4bcf-ac50-8940a0aa0604
uuid:6a4f5799-c1c6-4bcf-ac50-8940a0aa0604
urnnbn:urn:nbn:cz:aba007-000dlt

Subject:

Myxosporea, ultrastructure, Zschokkella, and Ortholinea

Type:

model:internalpart and TEXT

Format:

print

Description:

Two myxosporean species, Zschokkella pleomorpha Lom et Dyková, 1995 (Zp) and Ortholinea fluviatilis Lom et Dyková, 1995 (Of) from the kidney of Tetraodon fluviatilis were studied by transmission electron microscope. Coelozoic sporogonie plasmodia of both species use pseudopodia-like projections for attachment to the epithelial cells of renal tubules. These projections either attach to host microvilli forming an interface reminiscent of septate junction (Zp) or are embedded into the epithelial cell surface (Of) or are inserted into gaps between epithelial cells (Zp, Of). Zp produces spores only by direct division of generative cells while in Of pansporoblasts prevail over direct division of generative cells. Sporogonie plasmodia of Zp greatly differ in size and in the variety of cytoplasmic constituents. A special feature in capsulogenesis is a transient envelope encasing the capsular primordium; there are fine fibres on the surface of the nascent filament spaced at 11 nm. In Of, vegetative nuclei of the plasmodium adhere to generative cells in a way reminding of sporoplasmic plasmodium of actinospores. In Of plasmodia, several unusual cytoplasmic structures were observed (membrane bound bodies with fuzzy radial contents or with a central dense inclusion, and endoplasmic reticulum cistemae forming a scalloped network). Of may also form intracellular coelozoic sporogonie plasmodia in the epithelial cells of renal tubules; these stages do not seem to constitute an important part of the life cycle.

Language:

English

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

189-202 and 31-44

Source:

Folia parasitologica | 1996 Volume:43 | Number:3

Harvested from:

CDK

Metadata only:

false