Ultrastructure of cuticle formation in a parasitic nematode, Nematospiroides dubius

Bonner, Thomas P.; Menefee, Max G.; Etges, Frank J.

doi:10.1007/bf00309730

Cited by 25 publications

(10 citation statements)

References 17 publications

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“…This same growth phase causes a differential increase in the length of the somatic muscle cells and the distance between the external cuticular markings (sec O'GRAOY, 1983(sec O'GRAOY, , 1984. Similar cuticular alteration in intcrmoult growth has been noted in other ncmatodc species by AOKI et al (1980), BONNER et al (1970), HOWELLS & BLAINEY (1983), JOHNSON et al (1970), KOZEK (1971) and LEE (1970).…”

Section: Discussionsupporting

confidence: 77%

Growth and form of the fourth-stage larvae and early adults of Ascaris suum Goeze, 1782 (Nematoda: Ascaridoidea) developing in pigs

O’Grady

Harpur

1985

JHL

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Section: Discussionsupporting

confidence: 77%

Growth and form of the fourth-stage larvae and early adults of Ascaris suum Goeze, 1782 (Nematoda: Ascaridoidea) developing in pigs

O’Grady

Harpur

1985

JHL

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“…Aoki et al (1980) observed that the growth of the vertebrate stages of B. pahangi involves a broadening of the cuticular annulations. Johnson, Van Grundy & Thompson (1970), Lee (1970), Bonner, Menefee & Etges (1970), Kozek (1971) described similar processes in the growth of other nematode species. The primary purpose of this study was to establish the relationship between growth and surface area changes in the developing 4th-stage larvae of B. pahangi.…”

Section: Resultsmentioning

confidence: 85%

The moulting process and the phenomenon of intermoult growth in the filarial nematode Brugia pahangi

Howells

Blainey

1983

Parasitology

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The larvae of Brugia pahangi recovered from the jird have been shown to grow continuously between moults, their length increasing at least 5-fold during the 4th instar. This intermoult growth is achieved without an increase in the surface area of larvae. The cuticle of very early 4th and 5th-stage worms is highly folded and intermoult growth is accommodated by an expansion of surface annular folds. The major increases in the surface area of larvae occur only through ecdysis, with an 8-fold increase in the surface area being achieved at the 3rd moult. The growth curve of these worms is therefore sigmoidal but the surface area curve is stepped. The relationship between the cuticles of nematodes and insects is discussed.

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“…27). The similarity of the outer trilaminar membrane with the plasma membrane has led CROWE et al Similarly the triple-layered membrane in the cortex of the nematode cuticle has been thought to represent the "old" hypodermal plasma membrane which was believed to be "shed" with the formation of the cuticle during molt (see LEE 1970LEE ,1972BONNER et al 1970;BIRD 1971). This would mean that the nematode's cuticle is actually an intracellular structure, an hypothesis which has been recently brought forth by BONNER et al (1970) in particular.…”

Section: Discussionmentioning

confidence: 99%

“…The similarity of the outer trilaminar membrane with the plasma membrane has led CROWE et al Similarly the triple-layered membrane in the cortex of the nematode cuticle has been thought to represent the "old" hypodermal plasma membrane which was believed to be "shed" with the formation of the cuticle during molt (see LEE 1970LEE ,1972BONNER et al 1970;BIRD 1971). This would mean that the nematode's cuticle is actually an intracellular structure, an hypothesis which has been recently brought forth by BONNER et al (1970) in particular. However, further studies using also radioactive markers during cuticle development have now clearly established that the trilaminar cortical membrane of the nematode cuticle is not a direct derivative of the plasma membrane, but becomes assembled outside the hypodermal plasma membrane after the precursors are secreted in the very early stages of molting (see BONNER and WEINSTEIN 1972;DICK and WRIGHT 1973).…”

Section: Discussionmentioning

confidence: 99%

Comparative fine structure study of the Gastrotrich cuticle and aspects of cuticle evolution within the Aschelminthes1

Rieger

2009

Journal of Zoological Systematics and Evolutionary Research

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Summary The fine structure of the cuticle of 28 species of marine macrodasyid and chaetonotoid gastro‐trichs is described. According to this comparative study, the gastrotrich cuticle consists of à fibrous basal layer and an outer lamellar layer. The latter is formed of one to many sheaths which have à unit membrane‐like fine structure. The sheaths (= bilayers) are assumed, based on preliminary histochemical studies, to contain some lipo‐protein‐polysaccharide complex. The formation appears to be extracellular, without direct connection to the cell membrane of the epidermis cell. This outer bilayer system may function in the regulation of exchange of ions at the animal‐water interface. The cuticle evolution within the gastrotrichs as well as within the whole superphylum of the Aschelminthes is discussed in detail. Within the gastrotrichs Remane's (1936) hypothesis of à multiple origin of the various scales and spines is strongly supported. àLepidodasys‐, à thaumastodermatid‐, àChordodasys‐ and àChaetonotida‐Pauci‐tubulatina line are distinguished as different lines of cuticle specializations within the phylum. Within the Aschelminthes and other lower Bilateria, the gastrotrich cuticle supports à separation of the Rotifera and Gastrotricha and supports the view, in conjunction with other characters, particularly the myoepithelial pharynx, of close ties of gastrotrichs to the Nematoda and possibly the Tardigrada. Résumé Etude comparée ultrastructurale de la cuticule des Gastrotriches La structure‐fine cuticulaire de 28 espèces de macrodasyidés et chaetonotidés est dlcrite. En tous cas, deux couches pouvaient etre distinguees: une couche lamellaire extérieure et une couche basale, fibrillaire, a l'intérieur. La première se constitue de membranes tassées ressemblant à des membranes cellulaires, qui sont décrites comme «bilayers» et représentent en toute probability un complexe lipo‐proténe‐ polysaccharide. La formation de ces structures est extracellulaire, sans connection directe avec la membrane des cellules épidermales. On assume que la couche lamellaire fait fonction de régulateur dans l'échange de matières entre l'organisme et son milieu. L'évolution de la cuticle des gastrotriches et des aschelminthes est discutée. L'hy‐pothèse de Remane (1936) concernant l'origine multiple des cuticules sculptées des gastrotriches est accentuée de nouveau. Quatre lignes de spécialisation cuticulaire convergentes sont distinguées, nommément les lignes de Lepidodasys; des Thaumastodermatidae; de Chordodasys; et des Chaetonotidae. La structure fine de la cuticle des gastrotriches ne suggère pas de relation étroite entre ce groupe et les rotatoires; con join tement avec des similarités de structure pharyngéale, la structure fine de la cuticule supporte un rapport proche entre gastrotriches, nématodes, et peut‐être même les tardigrades. Zusammenfassung Vergleichende Feinstrukturuntersuchung der Gastrotrichenkutikula Die Feinstruktur der Kutikula von 28 Arten mariner Macrodasyiden und Chaetonotiden wird beschrieben. In alien Formen ...

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Ultrastructure of cuticle formation in a parasitic nematode, Nematospiroides dubius

Cited by 25 publications

References 17 publications

Growth and form of the fourth-stage larvae and early adults of Ascaris suum Goeze, 1782 (Nematoda: Ascaridoidea) developing in pigs

Growth and form of the fourth-stage larvae and early adults of Ascaris suum Goeze, 1782 (Nematoda: Ascaridoidea) developing in pigs

The moulting process and the phenomenon of intermoult growth in the filarial nematode Brugia pahangi

Comparative fine structure study of the Gastrotrich cuticle and aspects of cuticle evolution within the Aschelminthes1

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