First evidence for temporary and permanent adhesive systems in the stalked barnacle cyprid, Octolasmis angulata

Although there have been extensive studies on the larval adhesion of acorn barnacles over the past few decades, little is known about stalked barnacles. For the first time, we describe the larval adhesive systems in the stalked barnacle, Octolasmis angulata and the findings differ from previous repo...

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Bibliographic Details
Published in:Scientific reports 2017-03, Vol.7 (1), p.44980-44980, Article 44980
Main Authors: Yap, Fook Choy, Wong, Wey-Lim, Maule, Aaron G., Brennan, Gerard P., Chong, Ving Ching, Lim, Lee Hong Susan
Format: Article
Language:English
Subjects:
101/28
631/136/1660
631/1647/328/2082
631/535/1258
631/601/1737
Adhesives
Adhesives - chemistry
Animals
Aquatic Organisms - chemistry
Aquatic Organisms - metabolism
Biological Factors - chemistry
Biological Factors - metabolism
Cement
Exocrine Glands - metabolism
Exocrine Glands - ultrastructure
Exocytosis
Glands
Humanities and Social Sciences
Invaginations
Microtubules
multidisciplinary
Neck
Science
Secretion
Secretory vesicles
Thoracica - chemistry
Thoracica - metabolism
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Summary:Although there have been extensive studies on the larval adhesion of acorn barnacles over the past few decades, little is known about stalked barnacles. For the first time, we describe the larval adhesive systems in the stalked barnacle, Octolasmis angulata and the findings differ from previous reports of the temporary (antennulary) and cement glands in thoracican barnacles. We have found that the temporary adhesives of cyprid are produced by the clustered temporary adhesive glands located within the mantle, instead of the specialised hypodermal glands in the second antennular segment as reported in the acorn barnacles. The temporary adhesive secretory vesicles (TASV) are released from the gland cells into the antennule via the neck extensions of the glands, and surrounded with microtubules in the attachment disc. Cement glands undergo a morphological transition as the cyprid grows. Synthesis of the permanent adhesives only occurs during the early cyprid stage, and is terminated once the cement glands reach maximum size. Evidence of the epithelial invaginations on the cement glands supports the involvement of exocytosis in the secretion of the permanent adhesives. This study provides new insight into the larval adhesives system of thoracican barnacles.
ISSN:2045-2322
2045-2322
DOI:10.1038/srep44980