Ultrastructural comparative analysis on the adhesive papillae of the swimming larvae of three ascidian species
This paper presents a preliminary report on the papillae of the swimming larvae of three ascidian species: Ascidia malaca, Phallusia mammillata and Ciona intestinalis. The investigations, carried out at ultrastructural level and at confocal laser microscope, have evidenced, in the adhesive papillae...
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University of Modena and Reggio Emilia
2009-03-01
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Series: | Invertebrate Survival Journal |
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doaj-030e07373199496796620c0336cad5822020-11-25T03:20:45ZengUniversity of Modena and Reggio EmiliaInvertebrate Survival Journal1824-307X2009-03-0161SS77S86Ultrastructural comparative analysis on the adhesive papillae of the swimming larvae of three ascidian speciesG DolcemascoloR PennatiF De BernardiF DamianiM GianguzzaThis paper presents a preliminary report on the papillae of the swimming larvae of three ascidian species: Ascidia malaca, Phallusia mammillata and Ciona intestinalis. The investigations, carried out at ultrastructural level and at confocal laser microscope, have evidenced, in the adhesive papillae of the three studied species, three different cell-types: axial columnar cells, collocytes, sensory cells respectively. The adhesive papillae of A. malaca and P. mammillata show central axial columnar cells with long microvilli emerging from the apical edge and extending throughout the hyaline cap. Collocytes are elongated secreting cells, lying in middle-lateral side. Sensory cells have a cilium at the apical side and an axon proceeding from the basal side. The adhesive papillae of C. intestinalis present some differences in the ultrastructure of the axial columnar cells, which bear a big digitiform protrusion, extending throughout the hyaline cap and a lot of microtubules along the cell axis. The investigations, carried out at confocal microscopy, have evidentiated a clear fluorescence in the papillae of the three studied species and a network of nervous fibers projecting from the papillar base up to cerebral vesicle of the cephalenteron. The characteristic of simple and coniforme type and the adhesive and sensorial functions of adhesive papillae of three ascidian species examined are confirmed.http://www.isj.unimo.it/articoli/ISJ-Suppl-009.pdfswimming larvae ascidiaepapillaeultrastructurecomparative analysis |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
G Dolcemascolo R Pennati F De Bernardi F Damiani M Gianguzza |
spellingShingle |
G Dolcemascolo R Pennati F De Bernardi F Damiani M Gianguzza Ultrastructural comparative analysis on the adhesive papillae of the swimming larvae of three ascidian species Invertebrate Survival Journal swimming larvae ascidiae papillae ultrastructure comparative analysis |
author_facet |
G Dolcemascolo R Pennati F De Bernardi F Damiani M Gianguzza |
author_sort |
G Dolcemascolo |
title |
Ultrastructural comparative analysis on the adhesive papillae of the swimming larvae of three ascidian species |
title_short |
Ultrastructural comparative analysis on the adhesive papillae of the swimming larvae of three ascidian species |
title_full |
Ultrastructural comparative analysis on the adhesive papillae of the swimming larvae of three ascidian species |
title_fullStr |
Ultrastructural comparative analysis on the adhesive papillae of the swimming larvae of three ascidian species |
title_full_unstemmed |
Ultrastructural comparative analysis on the adhesive papillae of the swimming larvae of three ascidian species |
title_sort |
ultrastructural comparative analysis on the adhesive papillae of the swimming larvae of three ascidian species |
publisher |
University of Modena and Reggio Emilia |
series |
Invertebrate Survival Journal |
issn |
1824-307X |
publishDate |
2009-03-01 |
description |
This paper presents a preliminary report on the papillae of the swimming larvae of three ascidian species: Ascidia malaca, Phallusia mammillata and Ciona intestinalis. The investigations, carried out at ultrastructural level and at confocal laser microscope, have evidenced, in the adhesive papillae of the three studied species, three different cell-types: axial columnar cells, collocytes, sensory cells respectively. The adhesive papillae of A. malaca and P. mammillata show central axial columnar cells with long microvilli emerging from the apical edge and extending throughout the hyaline cap. Collocytes are elongated secreting cells, lying in middle-lateral side. Sensory cells have a cilium at the apical side and an axon proceeding from the basal side. The adhesive papillae of C. intestinalis present some differences in the ultrastructure of the axial columnar cells, which bear a big digitiform protrusion, extending throughout the hyaline cap and a lot of microtubules along the cell axis. The investigations, carried out at confocal microscopy, have evidentiated a clear fluorescence in the papillae of the three studied species and a network of nervous fibers projecting from the papillar base up to cerebral vesicle of the cephalenteron. The characteristic of simple and coniforme type and the adhesive and sensorial functions of adhesive papillae of three ascidian species examined are confirmed. |
topic |
swimming larvae ascidiae papillae ultrastructure comparative analysis |
url |
http://www.isj.unimo.it/articoli/ISJ-Suppl-009.pdf |
work_keys_str_mv |
AT gdolcemascolo ultrastructuralcomparativeanalysisontheadhesivepapillaeoftheswimminglarvaeofthreeascidianspecies AT rpennati ultrastructuralcomparativeanalysisontheadhesivepapillaeoftheswimminglarvaeofthreeascidianspecies AT fdebernardi ultrastructuralcomparativeanalysisontheadhesivepapillaeoftheswimminglarvaeofthreeascidianspecies AT fdamiani ultrastructuralcomparativeanalysisontheadhesivepapillaeoftheswimminglarvaeofthreeascidianspecies AT mgianguzza ultrastructuralcomparativeanalysisontheadhesivepapillaeoftheswimminglarvaeofthreeascidianspecies |
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