CYTOSKELETAL ELEMENTS IN ARTHROPOD SENSILLA AND MAMMALIAN PHOTORECEPTORS

Abstract

Summary— Ciliary receptor cells, typified by cilia or modified cilia, are very common in the animal kingdom. In addition to the cytoskeleton of their ciliary processes these receptors possess other specific prominent cytoskeletal elements. Two representative systems are presented: i) scolopidia, mechanosensitive sensilla of various arthropod species; and ii) photoreceptor cells of the retina of the bovine eye. Two cytoskeletal structures are characteristic for arthropod scolopidia: a scolopale typifies the innermost auxiliary cell, and long ciliary rootlets are extending well into the sensory cells. The latter element is also charactristics for the inner segment of the photoreceptor cells in bovine. The scolopale of scolopidia is mainly composed of actin filaments. In the absence of myosin, the uniform polarity of the actin filaments and their association with tropomyosin all indicate a stabilizing role of the filament bundles within the scolopale. This function and a certina elasticity of actin filament bundles may be important during stimulation of the sensilla. The ciliary rootlets of both systems originate at the basal bodies at the ciliary base of the sensory cells and project proximally. These rootlets are composed of longitudinally oriented, fine filaments forming a characteristic regular cross‐striation. An α‐actinin immunoreactivity was detected within the ciliary rootlets of scolopidia. In addition, antibodies to centrin react with the rootlets of both types of receptors. Since centrin is largely responsible for the contraction of the flagellar rootlets in green algae, contraction may also occur in the ciliary rootlets of insect sensilla and vertebrate photoreceptors. In both system, contraction or relaxation of the ciliary rootlets could serve in sensory transduction or adaptation.

Autoren

Uwe Wolfrum

DOI

10.1016/0248-4900(92)90441-3

eISSN

1768-322X

ISSN

0248-4900

Ausgabe der Veröffentlichung

3

Zeitschrift

Biology of the Cell

Sprache

en

Online publication date

2012

Paginierung

373 - 381

Datum der Veröffentlichung

1992

Status

Published

Herausgeber

Wiley

Herausgeber URL

http://dx.doi.org/10.1016/0248-4900(92)90441-3

Datum der Datenerfassung

2023

Titel

Cytoskeletal elements in arthorpod sensilla and mammalian photoreceptors*

Ausgabe der Zeitschrift

76

Data source: Crossref

Abstract

Ciliary receptor cells, typified by cilia or modified cilia, are very common in the animal kingdom. In addition to the cytoskeleton of their ciliary processes these receptors possess other specific prominent cytoskeletal elements. Two representative systems are presented: i) scolopidia, mechanosensitive sensilla of various arthropod species; and ii) photoreceptor cells of the retina of the bovine eye. Two cytoskeletal structures are characteristic for arthropod scolopidia: a scolopale typifies the innermost auxiliary cell, and long ciliary rootlets are extending well into the sensory cells. The latter element is also characteristic for the inner segment of the photoreceptor cells in bovine. The scolopale of scolopidia is mainly composed of actin filaments. In the absence of myosin, the uniform polarity of the actin filaments and their association with tropomyosin all indicate a stabilizing role of the filament bundles within the scolopale. This function and a certain elasticity of actin filament bundles may be important during stimulation of the sensilla. The ciliary rootlets of both systems originate at the basal bodies at the ciliary base of the sensory cells and project proximally. These rootlets are composed of longitudinally oriented, fine filaments forming a characteristic regular cross-striation. An alpha-actinin immunoreactivity was detected within the ciliary rootlets of scolopidia. In addition, antibodies to centrin react with the rootlets of both types of receptors. Since centrin is largely responsible for the contraction of the flagellar rootlets in green algae, contraction may also occur in the ciliary rootlets of insect sensilla and vertebrate photoreceptors. In both systems, contraction or relaxation of the ciliary rootlets could serve in sensory transduction or adaptation.

Addresses

Zoologisches Institut I, Universität Karlsruhe (TH), Germany.

Autoren

U Wolfrum

DOI

10.1016/0248-4900(92)90441-3

eISSN

1768-322X

Externe Identifier

PubMed Identifier: 1305480

Open access

false

ISSN

0248-4900

Ausgabe der Veröffentlichung

3

Zeitschrift

Biology of the cell

Schlüsselwörter

Mechanoreceptors
Cytoskeleton
Animals
Cattle
Crustacea
Histocytochemistry
Immunohistochemistry
Photoreceptor Cells
Insecta

Sprache

eng

Medium

Print

Paginierung

373 - 381

Datum der Veröffentlichung

1992

Status

Published

Datum der Datenerfassung

1992

Titel

Cytoskeletal elements in arthropod sensilla and mammalian photoreceptors.

Sub types

Research Support, Non-U.S. Gov't
Journal Article

Ausgabe der Zeitschrift

76

Data source: Europe PubMed Central

Abstract

Ciliary receptor cells, typified by cilia or modified cilia, are very common in the animal kingdom. In addition to the cytoskeleton of their ciliary processes these receptors possess other specific prominent cytoskeletal elements. Two representative systems are presented: i) scolopidia, mechanosensitive sensilla of various arthropod species; and ii) photoreceptor cells of the retina of the bovine eye. Two cytoskeletal structures are characteristic for arthropod scolopidia: a scolopale typifies the innermost auxiliary cell, and long ciliary rootlets are extending well into the sensory cells. The latter element is also characteristic for the inner segment of the photoreceptor cells in bovine. The scolopale of scolopidia is mainly composed of actin filaments. In the absence of myosin, the uniform polarity of the actin filaments and their association with tropomyosin all indicate a stabilizing role of the filament bundles within the scolopale. This function and a certain elasticity of actin filament bundles may be important during stimulation of the sensilla. The ciliary rootlets of both systems originate at the basal bodies at the ciliary base of the sensory cells and project proximally. These rootlets are composed of longitudinally oriented, fine filaments forming a characteristic regular cross-striation. An alpha-actinin immunoreactivity was detected within the ciliary rootlets of scolopidia. In addition, antibodies to centrin react with the rootlets of both types of receptors. Since centrin is largely responsible for the contraction of the flagellar rootlets in green algae, contraction may also occur in the ciliary rootlets of insect sensilla and vertebrate photoreceptors. In both systems, contraction or relaxation of the ciliary rootlets could serve in sensory transduction or adaptation.

Autoren

U Wolfrum

Autoren-URL

https://www.ncbi.nlm.nih.gov/pubmed/1305480

DOI

10.1016/0248-4900(92)90441-3

ISSN

0248-4900

Ausgabe der Veröffentlichung

3

Zeitschrift

Biol Cell

Schlüsselwörter

Animals
Cattle
Crustacea
Cytoskeleton
Histocytochemistry
Immunohistochemistry
Insecta
Mechanoreceptors
Photoreceptor Cells

Sprache

eng

Country

England

Paginierung

373 - 381

Datum der Veröffentlichung

1992

Status

Published

Datum, an dem der Datensatz öffentlich gemacht wurde

1993

Titel

Cytoskeletal elements in arthropod sensilla and mammalian photoreceptors.

Sub types

Journal Article
Research Support, Non-U.S. Gov't

Ausgabe der Zeitschrift

76

Data source: PubMed

CYTOSKELETAL ELEMENTS IN ARTHROPOD SENSILLA AND MAMMALIAN PHOTORECEPTORS

Tools