Formation and Function of the Primary Tube During Settlement and Metamorphosis of the Marine Polychaete Hydroides elegans (Haswell, 1883) (Serpulidae)

2021 ◽  
Vol 240 (2) ◽  
pp. 82-94
Author(s):  
Megan J. Huggett ◽  
Eugenio J. Carpizo-Ituarte ◽  
Brian T. Nedved ◽  
Michael G. Hadfield
Keyword(s):  
Hydroides Elegans ◽  
Settlement And Metamorphosis ◽  
Marine Polychaete ◽  
And Function

scholarly journals Toxicity of silver nanoparticles on fertilization success and early development of the marine polychaete Hydroides elegans (Haswell, 1883)

2017 ◽  
Vol 78 (1) ◽  
Author(s):  
Chandhirasekar Devakumar ◽  
Hemalatha Gopalakrishnan ◽  
Arulvasu Chinnasamy ◽  
Balakumar Subramanian ◽  
Prabhu Durai
Keyword(s):  
Silver Nanoparticles ◽  
Early Development ◽  
Fertilization Success ◽  
Hydroides Elegans ◽  
Marine Polychaete

scholarly journals The natural sequence of events in larval settlement and metamorphosis of Hydroides elegans (Polychaeta; Serpulidae)

2021 ◽  
Author(s):  
Michael G. Hadfield ◽  
Marnie L. Freckelton ◽  
Brian T. Nedved
Keyword(s):  
Bacterial Species ◽  
Larval Settlement ◽  
Bacterial Genome ◽  
Model Organism ◽  
Ciliated Cells ◽  
Hydroides Elegans ◽  
Bacterial Extract ◽  
Marine Habitats ◽  
Sequence Of Events ◽  
Settlement And Metamorphosis

The broadly distributed serpulid worm Hydroides elegans has become a model organism for studies of marine biofouling, development and the processes of larval settlement and metamorphosis induced by surface microbial films. Contrasting descriptions of the initial events of these recruitment processes, whether settlement is induced by (1) natural multi-species biofilms, (2) biofilms composed of single bacterial species known to induce settlement, or (3) a bacterial extract stimulated the research described here. We found that settlement induced by natural biofilms or biofilms formed by the bacterium Pseudoalteromonas luteoviolacea is invariably initiated by attachment and secretion of an adherent and larva-enveloping primary tube, followed by loss of motile cilia and ciliated cells and morphogenesis. The bacterial extract containing complex tailocin arrays derived from an assemblage of phage genes incorporated into the bacterial genome appears to induce settlement events by destruction of larval cilia and ciliated cells, followed by attachment and primary-tube formation. Similar destruction occurred when precompetent larvae and larvae of a nudibranch gastropod were exposed to the extract, neither of which metamorphosed. We further argue that larvae that lose their cilia before attachment would be swept away from the sites that stimulated settlement by the turbulent flow characteristic of most marine habitats.

scholarly journals The natural sequence of events in larval settlement and metamorphosis of Hydroides elegans (Polychaeta; Serpulidae)

PLoS ONE ◽  
2021 ◽  
Vol 16 (5) ◽  
pp. e0249692
Author(s):  
Michael G. Hadfield ◽  
Marnie L. Freckelton ◽  
Brian T. Nedved
Keyword(s):  
Bacterial Species ◽  
Larval Settlement ◽  
Bacterial Genome ◽  
Model Organism ◽  
Ciliated Cells ◽  
Hydroides Elegans ◽  
Bacterial Extract ◽  
Marine Habitats ◽  
Sequence Of Events ◽  
Settlement And Metamorphosis

The broadly distributed serpulid worm Hydroides elegans has become a model organism for studies of marine biofouling, development and the processes of larval settlement and metamorphosis induced by surface microbial films. Contrasting descriptions of the initial events of these recruitment processes, whether settlement is induced by (1) natural multi-species biofilms, (2) biofilms composed of single bacterial species known to induce settlement, or (3) a bacterial extract stimulated the research described here. We found that settlement induced by natural biofilms or biofilms formed by the bacterium Pseudoalteromonas luteoviolacea is invariably initiated by attachment and secretion of an adherent and larva-enveloping primary tube, followed by loss of motile cilia and ciliated cells and morphogenesis. The bacterial extract containing complex tailocin arrays derived from an assemblage of phage genes incorporated into the bacterial genome appears to induce settlement events by destruction of larval cilia and ciliated cells, followed by attachment and primary-tube formation. Similar destruction occurred when precompetent larvae of H. elegans or larvae of a nudibranch gastropod were exposed to the extract, although neither of them metamorphosed. We argue that larvae that lose their cilia before attachment would be swept away from the sites that stimulated settlement by the turbulent flow characteristic of most marine habitats.

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