Ultrastructure of the tube foot sensory-secretory complex in Ophiocomina nigra (Echinodermata, Ophiuridea)

Ball, Brendan; Jangoux, Michel

doi:10.1007/bf00312471

Cited by 16 publications

(28 citation statements)

References 32 publications

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“…¢liformis showed a similar staining reaction to previously studied suspension feeding species, e.g. Ophiocomina nigra (Ball & Jangoux, 1990b), Hemipholis elongata (Hadjuk, 1992) and Ophionereis schayeri (Mu« ller & Troschel) (Byrne, 1994). However, quite di¡erent staining characteristics were observed in A. chiajei.…”

Section: Discussionmentioning

confidence: 55%

“…In A. ¢liformis, the complexes stained in a similar manner ( Figure 1J) to the sensory^secretory complexes of Ophiocomina nigra (Ball & Jangoux, 1990b), i.e. the cells of the complexes were stained clearly.…”

Section: Sensory^secretory Complexesmentioning

confidence: 82%

“…Ball & Jangoux (1990b) described sensory^secretory complexes on the tube feet of the epifaunal, suspension-feeding ophiuroid Ophiocomina nigra (Abildgaard). These complexes form cohesive units, made up of two adhesive secretory cells, one sensory and one monociliated 'neurosecretory-like' cell.…”

Section: Introductionmentioning

confidence: 99%

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Ultrastructure of the podia of Amphiura chiajei and Amphiura filiformis and their role in feeding

Keogh

Keegan²

2006

J. Mar. Biol. Ass.

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O Deceased.Morphological study of the podia of the suspension feeding Amphiura ¢liformis and the deposit feeding Amphiura chiajei revealed sensory^secretory complexes in the podial epidermis, consisting of four cells, two secretory and two sensory. Large mucus cells were found in association, but not exclusively, with the sensory^secretory complexes. In A. ¢liformis, mucus cells stained positively for both acid and neutral mucopolysaccharides, while, in A. chiajei, these cells stained only for acid mucopolysaccharides. The surfaces of the arm podia in A. chiajei were relatively smooth, while the arm podia of A. ¢liformis bear papillae. The sensory^secretory complexes open through numerous paired pores, with each pair having an intervening cilium. Pores were restricted to the podial tip in A. chiajei, while in A. ¢liformis they are concentrated on the podial tip and on the papillae. Amphiura chiajei shows very little di¡erentiation of the podia along the length of the arm. In A. ¢liformis, the distal podia have papillae throughout their entire length, with pores being found on the head region and the papillar tips. Here, the papillae are oriented in such a way (i.e. facing inward towards the ventral arm plate) as to increase the area of the ¢ltering surface of the podium, serviced by the sticky secretions from the sensory^secretory complexes. The proximal podia are relatively simple in structure and are thought to function more in the transportation of mucus wrapped particles to the mouth rather than in their capture. The di¡erence in structure of the podia and chemical composition of podial secretory cells are taken to re£ect the di¡erence in feeding styles of the two species.

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Section: Discussionmentioning

confidence: 55%

Section: Sensory^secretory Complexesmentioning

confidence: 82%

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Ultrastructure of the podia of Amphiura chiajei and Amphiura filiformis and their role in feeding

Keogh

Keegan²

2006

J. Mar. Biol. Ass.

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“…The cuticle (Figures 3A-C) (measuring ~0-65 um thick) is composed of three layers and closely resembles that described for the podia of O. nigra (Ball & Jangoux, 1990a). Beneath the cuticle lies a broad (~2-5-3 um thick) subcuticular space traversed by the microvilli of the epidermal cells ( Figure 3A).…”

Section: Transmission Microscopy Of the Spine Epidermis And Nervous Smentioning

confidence: 91%

“…Presumably, however, two different sets of sensory cells would be necessary, one to initiate feeding mucus release and the other defensive mucus release, otherwise both secretions would be released in response to any kind of stimulation. This is counter to the situation in the goblet cells and podial adhesive cells (Ball & Jangoux, 1990a), where mucus release is local.…”

Section: Cilia and Related Structuresmentioning

confidence: 96%

The Secretory System of the Spines of Ophiocomina Nigra (Echinodermata, Ophiuroidea)

Ball

Jangoux

1996

J. Mar. Biol. Ass.

Self Cite

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The morphology of the spines of the ophiuroid Ophiocomina nigra is described, with particular reference to the nervous system and the sensory and secretory structures of the epidermis. The nervous system is composed of two main spinal nerves, located at the centre of the spine, and their associated branches. There are three secretory cell-types described: (1) fibrillar secretory cells which produce long, javelin-shaped secretory packages and, occurring exclusively in the basal two thirds of the spine, penetrate deeply with their basal regions lying close to the axial nerve running through the spine centre; (2) granular secretory cells, which also penetrate deep within the spine, contain secretory granules in the form of spherical dense vesicles (-1-3 |im in diameter); and (3) goblet secretory cells, filled with packages of loose amorphous material, are superficial in location and usually found associated with a type A ciliated sensory cell. The secretions of the fibrillar and granular secretory cells are thought to perform the functions of defence and feeding respectively. A number of different ciliated sensory cell-types have been identified. Apart from the situation with the goblet cells, no close association was found between secretory and sensory cells. It is suggested that the nervous, sensory and secretory cells act together to form a mucous secretion system with centralized, rather than local control. This system appears to operate when it is advantageous to produce secretion all over the body simultaneously once any portion is stimulated. Stimulation of sensory cells might result in axonal excitation of the spinal nerves and hence to the entire epineural nervous system. In this way, glands located anywhere in the body, which are controlled by the epineural system could be quickly activated to cause mucus release. This contrasts with the situation in the podia where closely associated sensory and secretory cells acting together form a secretory system with localized control.

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Functional morphology of coronal and peristomeal podia in Sphaerechinus granularis (Echinodermata, Echinoida)

Flammang

Jangoux

1993

Zoomorphology

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Ultrastructure of the tube foot sensory-secretory complex in Ophiocomina nigra (Echinodermata, Ophiuridea)

Cited by 16 publications

References 32 publications

Ultrastructure of the podia of Amphiura chiajei and Amphiura filiformis and their role in feeding

Ultrastructure of the podia of Amphiura chiajei and Amphiura filiformis and their role in feeding

The Secretory System of the Spines of Ophiocomina Nigra (Echinodermata, Ophiuroidea)

Functional morphology of coronal and peristomeal podia in Sphaerechinus granularis (Echinodermata, Echinoida)

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