Structural and ultrastructural analysis of the gills in the bacterial-bearing species Thyasira falklandica (Bivalvia, Mollusca)
International audience In this study, the cellular organization of the gill that harbors symbiotic bacteria is described in the thyasirid Thyasira falklandica collected from South Shetlands in Antarctic. Sections of the gills revealed that T. falklandica belongs to the gill type 3, as described by D...
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ftunivantilles:oai:HAL:hal-00755289v1 2024-09-15T17:46:54+00:00 Structural and ultrastructural analysis of the gills in the bacterial-bearing species Thyasira falklandica (Bivalvia, Mollusca) Gros, Olivier Dias Passos, Flàvio de Lima Curi Meserani, Georgeana Systématique, adaptation, évolution (SAE) Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) Departemento de Zoologia Universidade de São Paulo = University of São Paulo (USP) 2007 https://hal.univ-antilles.fr/hal-00755289 https://doi.org/10.1007/s00435-007-0034-4 en eng HAL CCSD Springer Verlag info:eu-repo/semantics/altIdentifier/doi/10.1007/s00435-007-0034-4 hal-00755289 https://hal.univ-antilles.fr/hal-00755289 doi:10.1007/s00435-007-0034-4 ISSN: 0720-213X EISSN: 1432-234X Zoomorphology https://hal.univ-antilles.fr/hal-00755289 Zoomorphology, 2007, 126, pp.153-162. ⟨10.1007/s00435-007-0034-4⟩ Bivalvia Thyasiridae Symbiosis TEM SEM [SDV.BA]Life Sciences [q-bio]/Animal biology info:eu-repo/semantics/article Journal articles 2007 ftunivantilles https://doi.org/10.1007/s00435-007-0034-4 2024-08-07T03:09:22Z International audience In this study, the cellular organization of the gill that harbors symbiotic bacteria is described in the thyasirid Thyasira falklandica collected from South Shetlands in Antarctic. Sections of the gills revealed that T. falklandica belongs to the gill type 3, as described by Dufour (Biol Bull, 208:200-212, 2005), with an elongated lateral zone along the frontal-abfrontal axis of the gill Wlaments. The ciliated and intermediary zones looked similar to those described in symbionts-bearing bivalves. The lateral zone is more complex in T. falklandica than in other Thyasiridae already described. Such a zone is composed of four different cell types. Bacteriocytes are abundant in the frontal and abfrontal positions, while the middle part of the lateral zone is occupied mostly by numerous granule cells devoid of bacteria. All along the lateral zone, TEM and SEM observations show some ciliated cells, which are regularly interspersed between bacteriocytes and/or granule cells. Such cells, according to the long double ciliary roots of their cilia, should have a sensory function. Intercalary cells, which have never been observed between bacteriocytes, are restricted to the middle part of the lateral zone where their expansions overlap the adjacent granule cells. Bacterial symbionts occur only extracellularly among long microvilli diVerentiated by the bacteriocytes. They are abundant, usually spherical in shape (around 0.7 m length), and covered by the glycocalix from bacteriocyte microvilli. According to TEM views, the empty vesicles located in the periplasmic space should be sulfur storage, as known for other sulfur-oxidizing symbionts. Article in Journal/Newspaper Antarc* Antarctic Université des Antilles (UAG): HAL Zoomorphology 126 3 153 162 |
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Open Polar |
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Université des Antilles (UAG): HAL |
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ftunivantilles |
language |
English |
topic |
Bivalvia Thyasiridae Symbiosis TEM SEM [SDV.BA]Life Sciences [q-bio]/Animal biology |
spellingShingle |
Bivalvia Thyasiridae Symbiosis TEM SEM [SDV.BA]Life Sciences [q-bio]/Animal biology Gros, Olivier Dias Passos, Flàvio de Lima Curi Meserani, Georgeana Structural and ultrastructural analysis of the gills in the bacterial-bearing species Thyasira falklandica (Bivalvia, Mollusca) |
topic_facet |
Bivalvia Thyasiridae Symbiosis TEM SEM [SDV.BA]Life Sciences [q-bio]/Animal biology |
description |
International audience In this study, the cellular organization of the gill that harbors symbiotic bacteria is described in the thyasirid Thyasira falklandica collected from South Shetlands in Antarctic. Sections of the gills revealed that T. falklandica belongs to the gill type 3, as described by Dufour (Biol Bull, 208:200-212, 2005), with an elongated lateral zone along the frontal-abfrontal axis of the gill Wlaments. The ciliated and intermediary zones looked similar to those described in symbionts-bearing bivalves. The lateral zone is more complex in T. falklandica than in other Thyasiridae already described. Such a zone is composed of four different cell types. Bacteriocytes are abundant in the frontal and abfrontal positions, while the middle part of the lateral zone is occupied mostly by numerous granule cells devoid of bacteria. All along the lateral zone, TEM and SEM observations show some ciliated cells, which are regularly interspersed between bacteriocytes and/or granule cells. Such cells, according to the long double ciliary roots of their cilia, should have a sensory function. Intercalary cells, which have never been observed between bacteriocytes, are restricted to the middle part of the lateral zone where their expansions overlap the adjacent granule cells. Bacterial symbionts occur only extracellularly among long microvilli diVerentiated by the bacteriocytes. They are abundant, usually spherical in shape (around 0.7 m length), and covered by the glycocalix from bacteriocyte microvilli. According to TEM views, the empty vesicles located in the periplasmic space should be sulfur storage, as known for other sulfur-oxidizing symbionts. |
author2 |
Systématique, adaptation, évolution (SAE) Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) Departemento de Zoologia Universidade de São Paulo = University of São Paulo (USP) |
format |
Article in Journal/Newspaper |
author |
Gros, Olivier Dias Passos, Flàvio de Lima Curi Meserani, Georgeana |
author_facet |
Gros, Olivier Dias Passos, Flàvio de Lima Curi Meserani, Georgeana |
author_sort |
Gros, Olivier |
title |
Structural and ultrastructural analysis of the gills in the bacterial-bearing species Thyasira falklandica (Bivalvia, Mollusca) |
title_short |
Structural and ultrastructural analysis of the gills in the bacterial-bearing species Thyasira falklandica (Bivalvia, Mollusca) |
title_full |
Structural and ultrastructural analysis of the gills in the bacterial-bearing species Thyasira falklandica (Bivalvia, Mollusca) |
title_fullStr |
Structural and ultrastructural analysis of the gills in the bacterial-bearing species Thyasira falklandica (Bivalvia, Mollusca) |
title_full_unstemmed |
Structural and ultrastructural analysis of the gills in the bacterial-bearing species Thyasira falklandica (Bivalvia, Mollusca) |
title_sort |
structural and ultrastructural analysis of the gills in the bacterial-bearing species thyasira falklandica (bivalvia, mollusca) |
publisher |
HAL CCSD |
publishDate |
2007 |
url |
https://hal.univ-antilles.fr/hal-00755289 https://doi.org/10.1007/s00435-007-0034-4 |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
ISSN: 0720-213X EISSN: 1432-234X Zoomorphology https://hal.univ-antilles.fr/hal-00755289 Zoomorphology, 2007, 126, pp.153-162. ⟨10.1007/s00435-007-0034-4⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1007/s00435-007-0034-4 hal-00755289 https://hal.univ-antilles.fr/hal-00755289 doi:10.1007/s00435-007-0034-4 |
op_doi |
https://doi.org/10.1007/s00435-007-0034-4 |
container_title |
Zoomorphology |
container_volume |
126 |
container_issue |
3 |
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153 |
op_container_end_page |
162 |
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1810495334708674560 |