Please use this identifier to cite or link to this item: doi:10.22028/D291-38136
Title: The nudibranch Berghia stephanieae (Valdés, 2005) is not able to initiate a functional symbiosome-like environment to maintain Breviolum minutum (J.E.Parkinson & LaJeunesse 2018)
Author(s): Clavijo, Jenny Melo
Sickinger, Corinna
Bleidißel, Sabrina
Gasparoni, Gilles
Tierling, Sascha
Preisfeld, Angelika
Christa, Gregor
Language: English
Title: Frontiers in Marine Science
Volume: 9
Publisher/Platform: Frontiers
Year of Publication: 2022
Free key words: nudibranchia
photosynthetic symbiosis
onset of symbiosis
de novo transcriptome
symbiont recognition
DDC notations: 500 Science
Publikation type: Journal Article
Abstract: Photosymbiosis is found in different animal lineages and is best understood in cnidarians. A successful initiation and maintenance of the symbiosis between the animal hosts and the photosymbiotic partners is based on a recognition by specific host receptors. This triggers signaling cascades that promote the photobiont tolerance by the host, including an interpartner nutrient exchange and the ability of the host to cope with increased levels of reactive oxygen species (ROS) generated by the photobiont. Key to the successful symbiosis is the inhibition of the phagosomal maturation resulting in the formation of the symbiosome. In animals other than cnidarians, little is known about the photosymbiosis initiation and maintenance, for instance in sea slugs belonging to the Nudibranchia. Here, we investigated the gene expression profile of Berghia stephanieae, which is able to incorporate Breviolum minutum from its cnidarian prey Exaiptasia diaphana (Rapp, 1829) but is not able to maintain the algae for more than a couple of days during starvation. We show that the recognition of the algae is based on similar mechanisms present in cnidarians, and we identified some additional candidate genes that might be molluscan specific for photobiont recognition. Downstream, B. stephanieae responds to increased levels of ROS but is not able to stop the phagosomal maturation or decrease the immune response against B. minutum, which seem to be the key factors missing in B. stephanieae that accounts for the unstable symbiosis in this slug. Hence, B. stephanieae can be considered a transitional state toward a stable photosymbiosis and can help to elucidate general aspects of the evolutionary processes involved in establishing photosymbioses in animals.
DOI of the first publication: 10.3389/fmars.2022.934307
URL of the first publication:
Link to this record: urn:nbn:de:bsz:291--ds-381362
ISSN: 2296-7745
Date of registration: 22-Nov-2022
Description of the related object: Supplementary Material
Related object:
Faculty: NT - Naturwissenschaftlich- Technische Fakultät
Department: NT - Biowissenschaften
Professorship: NT - Prof. Dr. Jörn Walter
Collections:SciDok - Der Wissenschaftsserver der Universität des Saarlandes

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