Ultrastructural variability in the locomotor cortex of the ciliated protozoa, Mytilophilus pacificae

Kourosh Salehi-Ashtiani, Gregory A. Antipa

Research output: Contribution to journalArticle

Abstract

Mytilophilus pacificae is an endocommensal ciliate found in the mantle cavity of the Pacific Coast mussel Mytilus californianus. In this paper we report our findings on pellicular organization of this species. Transmission and scanning electron microscope examination of the somatic cortex revealed that a number of different types of kinetids, i.e. monokinetids, dikinetids, and polykinetids are found in the locomotor cortex. The type and distribution of the kinetids are described. Surprisingly, the locomotor region was found to be highly variable among individuals with respect to its kinetid distribution; each cell appears to have its own characteristic kinetid pattern. Some cells have mostly monokinetids and dikinetids in their locomotor cortex, while others may have dikinetids and polykinetids but very few monokinetids. In contrast to the locomotor region, the thigmotactic field (a region specialized for attachment) is exclusively composed of dikinetids and shows no heterogeneity. The finding of ultrastructural variability in the locomotor cortex was unexpected since, in the view of the structural conservatism hypothesis, the somatic cortex is seen as a 'stable' element. These observations raise new questions with regard to cortical pattern formation in this organism.

Original languageEnglish (US)
Pages (from-to)471-479
Number of pages9
JournalJournal of Eukaryotic Microbiology
Volume44
Issue number5
DOIs
StatePublished - Jan 1 1997

Fingerprint

Mytilus
Bivalvia
Politics
Organizations
Electrons

Keywords

  • Basal bodies
  • Conchophthirus
  • Kinetids
  • Pattern formation
  • Scuticociliatida
  • Structural conservatism hypothesis

ASJC Scopus subject areas

  • Microbiology

Cite this

Ultrastructural variability in the locomotor cortex of the ciliated protozoa, Mytilophilus pacificae. / Salehi-Ashtiani, Kourosh; Antipa, Gregory A.

In: Journal of Eukaryotic Microbiology, Vol. 44, No. 5, 01.01.1997, p. 471-479.

Research output: Contribution to journalArticle

@article{0f1701689aa7416eb61fe98e6635d8b5,
title = "Ultrastructural variability in the locomotor cortex of the ciliated protozoa, Mytilophilus pacificae",
abstract = "Mytilophilus pacificae is an endocommensal ciliate found in the mantle cavity of the Pacific Coast mussel Mytilus californianus. In this paper we report our findings on pellicular organization of this species. Transmission and scanning electron microscope examination of the somatic cortex revealed that a number of different types of kinetids, i.e. monokinetids, dikinetids, and polykinetids are found in the locomotor cortex. The type and distribution of the kinetids are described. Surprisingly, the locomotor region was found to be highly variable among individuals with respect to its kinetid distribution; each cell appears to have its own characteristic kinetid pattern. Some cells have mostly monokinetids and dikinetids in their locomotor cortex, while others may have dikinetids and polykinetids but very few monokinetids. In contrast to the locomotor region, the thigmotactic field (a region specialized for attachment) is exclusively composed of dikinetids and shows no heterogeneity. The finding of ultrastructural variability in the locomotor cortex was unexpected since, in the view of the structural conservatism hypothesis, the somatic cortex is seen as a 'stable' element. These observations raise new questions with regard to cortical pattern formation in this organism.",
keywords = "Basal bodies, Conchophthirus, Kinetids, Pattern formation, Scuticociliatida, Structural conservatism hypothesis",
author = "Kourosh Salehi-Ashtiani and Antipa, {Gregory A.}",
year = "1997",
month = "1",
day = "1",
doi = "10.1111/j.1550-7408.1997.tb05726.x",
language = "English (US)",
volume = "44",
pages = "471--479",
journal = "Journal of Eukaryotic Microbiology",
issn = "1066-5234",
publisher = "Wiley-Blackwell",
number = "5",

}

TY - JOUR

T1 - Ultrastructural variability in the locomotor cortex of the ciliated protozoa, Mytilophilus pacificae

AU - Salehi-Ashtiani, Kourosh

AU - Antipa, Gregory A.

PY - 1997/1/1

Y1 - 1997/1/1

N2 - Mytilophilus pacificae is an endocommensal ciliate found in the mantle cavity of the Pacific Coast mussel Mytilus californianus. In this paper we report our findings on pellicular organization of this species. Transmission and scanning electron microscope examination of the somatic cortex revealed that a number of different types of kinetids, i.e. monokinetids, dikinetids, and polykinetids are found in the locomotor cortex. The type and distribution of the kinetids are described. Surprisingly, the locomotor region was found to be highly variable among individuals with respect to its kinetid distribution; each cell appears to have its own characteristic kinetid pattern. Some cells have mostly monokinetids and dikinetids in their locomotor cortex, while others may have dikinetids and polykinetids but very few monokinetids. In contrast to the locomotor region, the thigmotactic field (a region specialized for attachment) is exclusively composed of dikinetids and shows no heterogeneity. The finding of ultrastructural variability in the locomotor cortex was unexpected since, in the view of the structural conservatism hypothesis, the somatic cortex is seen as a 'stable' element. These observations raise new questions with regard to cortical pattern formation in this organism.

AB - Mytilophilus pacificae is an endocommensal ciliate found in the mantle cavity of the Pacific Coast mussel Mytilus californianus. In this paper we report our findings on pellicular organization of this species. Transmission and scanning electron microscope examination of the somatic cortex revealed that a number of different types of kinetids, i.e. monokinetids, dikinetids, and polykinetids are found in the locomotor cortex. The type and distribution of the kinetids are described. Surprisingly, the locomotor region was found to be highly variable among individuals with respect to its kinetid distribution; each cell appears to have its own characteristic kinetid pattern. Some cells have mostly monokinetids and dikinetids in their locomotor cortex, while others may have dikinetids and polykinetids but very few monokinetids. In contrast to the locomotor region, the thigmotactic field (a region specialized for attachment) is exclusively composed of dikinetids and shows no heterogeneity. The finding of ultrastructural variability in the locomotor cortex was unexpected since, in the view of the structural conservatism hypothesis, the somatic cortex is seen as a 'stable' element. These observations raise new questions with regard to cortical pattern formation in this organism.

KW - Basal bodies

KW - Conchophthirus

KW - Kinetids

KW - Pattern formation

KW - Scuticociliatida

KW - Structural conservatism hypothesis

UR - http://www.scopus.com/inward/record.url?scp=0031239886&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0031239886&partnerID=8YFLogxK

U2 - 10.1111/j.1550-7408.1997.tb05726.x

DO - 10.1111/j.1550-7408.1997.tb05726.x

M3 - Article

VL - 44

SP - 471

EP - 479

JO - Journal of Eukaryotic Microbiology

JF - Journal of Eukaryotic Microbiology

SN - 1066-5234

IS - 5

ER -