Next Article in Journal
The Chalcone Isomerase Family in Cotton: Whole-Genome Bioinformatic and Expression Analyses of the Gossypium barbadense L. Response to Fusarium Wilt Infection
Previous Article in Journal
TILLING by Sequencing: A Successful Approach to Identify Rare Alleles in Soybean Populations
Previous Article in Special Issue
Complete Mitogenome of a Leaf-Mining Buprestid Beetle, Trachys auricollis, and Its Phylogenetic Implications
Open AccessArticle

Identification and Description of the Key Molecular Components of the Egg Strings of the Salmon Louse (Lepeophtheirus salmonis)

SLRC-Sea Lice Research Centre, Department of Biological Sciences, University of Bergen, 5020 Bergen, Norway
*
Author to whom correspondence should be addressed.
Genes 2019, 10(12), 1004; https://doi.org/10.3390/genes10121004
Received: 23 October 2019 / Revised: 21 November 2019 / Accepted: 30 November 2019 / Published: 3 December 2019
(This article belongs to the Special Issue Arthropod Genetics and Genomics)
The salmon louse Lepeophtheirus salmonis is a parasite of Atlantic salmon and other salmonids. Every year, it causes high costs for the Norwegian aquaculture industry. While the morphology of the female genital tract has been described, knowledge of the molecular basis of reproduction is very limited. We identified nine genes which are expressed exclusively in the female cement gland, the organ responsible for cement production, which is used to hold the eggs together and keep them attached to their mother in egg strings. Six of these genes encode proteins with signal peptides and probably form the main component of the cement. Two other genes are peroxidases, which are probably important in the cement formation. The last gene is not similar to any known protein, but contains a transmembrane domain. A knockdown of all these genes leads to missing or deformed egg strings, preventing reproduction of the lice. The correct assemblage of the cement in the cement gland is essential for successful reproduction of salmon lice. Similar proteins seem to be present in other copepod species, as well.
Keywords: reproduction; egg attachment; RNAi; Crustacean; Copepod; structure; cement; EGF; TSP; invertebrate reproduction; egg attachment; RNAi; Crustacean; Copepod; structure; cement; EGF; TSP; invertebrate
MDPI and ACS Style

Borchel, A.; Kongshaug, H.; Nilsen, F. Identification and Description of the Key Molecular Components of the Egg Strings of the Salmon Louse (Lepeophtheirus salmonis). Genes 2019, 10, 1004.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop