scholarly journals The apical sensory organ of a gastropod veliger is a receptor for settlement cues

2000 ◽  
Vol 198 (1) ◽  
pp. 67-76 ◽  
Author(s):  
MG Hadfield ◽  
EA Meleshkevitch ◽  
DY Boudko
Keyword(s):  
Sensory Organ ◽  
Settlement Cues ◽  
Apical Sensory Organ ◽  
Gastropod Veliger

scholarly journals FGF signalling controls formation of the apical sensory organ in the cnidarian Nematostella vectensis

Development ◽  
2008 ◽  
Vol 135 (10) ◽  
pp. 1761-1769 ◽  
Author(s):  
F. Rentzsch ◽  
J. H. Fritzenwanker ◽  
C. B. Scholz ◽  
U. Technau
Keyword(s):  
Sensory Organ ◽  
Nematostella Vectensis ◽  
Cnidarian Nematostella Vectensis ◽  
Apical Sensory Organ ◽  
Fgf Signalling

scholarly journals Laser ablation of the apical sensory organ of Hydroides elegans (Polychaeta) does not inhibit detection of metamorphic cues

2021 ◽  
Author(s):  
Brian T. Nedved ◽  
Marnie L. Freckelton ◽  
Michael G. Hadfield
Keyword(s):  
Laser Scanning ◽  
Marine Invertebrates ◽  
Receptor Site ◽  
Laser Pulses ◽  
Laser Scanning Confocal Microscopy ◽  
Cellular Damage ◽  
Sensory Organ ◽  
Hydroides Elegans ◽  
Scanning Confocal Microscopy ◽  
Apical Sensory Organ

AbstractLarvae of many marine invertebrates bear an anteriorly positioned apical sensory organ (ASO) presumed to be the receptor for settlement- and metamorphosis-inducing environmental cues, based on its structure, position and observed larval behavior. Larvae of the polychaete Hydroides elegans are induced to settle by bacterial biofilms, which they explore with their ASO and surrounding anteroventral surfaces. A micro-laser was utilized to destroy the ASO and other anterior ciliary structures in competent larvae of H. elegans. After ablation, larvae were challenged with bacterial biofilmed or clean surfaces and percent metamorphosis was determined. Ablated larvae were also assessed for cellular damage by applying fluorescently tagged FMRF-amide antibodies and observing the larvae by laser-scanning confocal microscopy. While the laser pulses caused extensive damage to the ASO and surrounding cells, they did not inhibit metamorphosis. We conclude that the ASO is not a required receptor site for cues that induce metamorphosis.Summary StatementLarvae of the polychaete Hydroides elegans retain the capacity to sense biofilm cues and metamorphose despite removal of their apical sensory organs, the supposed sensors for settlement cues.

scholarly journals Laser ablation of the apical sensory organ of Hydroides elegans (Polychaeta) does not inhibit detection of metamorphic cues

2021 ◽  
Author(s):  
Brian T. Nedved ◽  
Marnie L. Freckelton ◽  
Michael G. Hadfield
Keyword(s):  
Laser Scanning ◽  
Marine Invertebrates ◽  
Receptor Site ◽  
Laser Pulses ◽  
Laser Scanning Confocal Microscopy ◽  
Cellular Damage ◽  
Sensory Organ ◽  
Hydroides Elegans ◽  
Scanning Confocal Microscopy ◽  
Apical Sensory Organ

Larvae of many marine invertebrates bear an anteriorly positioned apical sensory organ (ASO) presumed to be the receptor for settlement- and metamorphosis-inducing environmental cues, based on its structure, position and observed larval behavior. Larvae of the polychaete Hydroides elegans are induced to settle by bacterial biofilms, which they explore with their ASO and surrounding anteroventral surfaces. A micro-laser was utilized to destroy the ASO and other anterior ciliary structures in competent larvae of H. elegans. After ablation, larvae were challenged with bacterial biofilmed or clean surfaces and percent metamorphosis was determined. Ablated larvae were also assessed for cellular damage by applying fluorescently tagged FMRF-amide antibodies and observing the larvae by laser-scanning confocal microscopy. While the laser pulses caused extensive damage to the ASO and surrounding cells, they did not inhibit metamorphosis. We conclude that the ASO is not a required receptor site for cues that induce metamorphosis.

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