The Saccharina latissima microbiome: Effects of region, season, and physiology

is a canopy-forming species of brown algae and, as such, is considered an ecosystem engineer. Several populations of this alga are exploited worldwide, and a decrease in the abundance of at its southern distributional range limits has been observed. Despite its economic and ecological interest, only...

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Published inFrontiers in microbiology Vol. 13; p. 1050939
Main Authors Burgunter-Delamare, Bertille, Rousvoal, Sylvie, Legeay, Erwan, Tanguy, Gwenn, Fredriksen, Stein, Boyen, Catherine, Dittami, Simon M
Format Journal Article
LanguageEnglish
Norwegian
Published Switzerland Frontiers Media 06.01.2023
Frontiers Media S.A
Subjects
brown macroalgae
holobiont
Life Sciences
metabarcoding
Microbiology
microbiota
natural population
microbiota
metabarcoding
holobiont
natural population
brown macroalgae
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Summary:is a canopy-forming species of brown algae and, as such, is considered an ecosystem engineer. Several populations of this alga are exploited worldwide, and a decrease in the abundance of at its southern distributional range limits has been observed. Despite its economic and ecological interest, only a few data are available on the composition of microbiota associated with and its role in algal physiologyn. We studied the whole bacterial community composition associated with samples from three locations (Brittany, Helgoland, and Skagerrak) by 16S metabarcoding analyses at different scales: algal blade part, regions, season (at one site), and algal physiologic state. We have shown that the difference in bacterial composition is driven by factors of decreasing importance: (i) the algal tissues (apex/meristem), (ii) the geographical area, (iii) the seasons (at the Roscoff site), and (iv) the algal host's condition (healthy vs. symptoms). Overall, , , and dominated the general bacterial communities. Almost all individuals hosted bacteria of the genus , accounting for 12% of the total sequences, and eight additional core genera were identified. Our results also highlight a microbial signature characteristic for algae in poor health independent of the disease symptoms. Thus, our study provides a comprehensive overview of the microbiome, forming a basis for understanding holobiont functioning.
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Reviewed by: Catherine Ann Pfister, The University of Chicago, United States; Niranjan Mekala, Rajiv Gandhi University, India
This article was submitted to Aquatic Microbiology, a section of the journal Frontiers in Microbiology
Edited by: Pia H. Moisander, University of Massachusetts Dartmouth, United States
ISSN:1664-302X
1664-302X
DOI:10.3389/fmicb.2022.1050939