Journal article 126 views
Impact of host species on assembly, composition, and functional profiles of phycosphere microbiomes
Line Roager 
,
Paul J. Kempen,
Mikkel Bentzon-Tilia ,
Eva C. Sonnenschein ,
Lone Gram
,
Paul J. Kempen,
Mikkel Bentzon-Tilia ,
Eva C. Sonnenschein ,
Lone Gram
bioRxiv
Swansea University Author:
Eva C. Sonnenschein
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DOI (Published version): 10.1101/2023.11.08.566273
Abstract
Microalgal microbiomes play vital roles in the growth and health of their host, however, their composition and functions remain only partially characterized, especially across microalgal phyla. In this study, a natural seawater microbiome was introduced to three distinct, axenic species of microalga...
| Published in: | bioRxiv |
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| Published: |
Cold Spring Harbor Laboratory
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa66581 |
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| Abstract: |
Microalgal microbiomes play vital roles in the growth and health of their host, however, their composition and functions remain only partially characterized, especially across microalgal phyla. In this study, a natural seawater microbiome was introduced to three distinct, axenic species of microalgae, the haptophyte Isochrysis galbana, the chlorophyte Tetraselmis suecica, and the diatom Conticribra weissflogii (previously Thalassiosira), and its divergence and assembly was monitored over 49 days using 16S rRNA amplicon and metagenomic analyses. The microbiomes had a high degree of host specificity in terms of taxonomic composition and potential functions, including CAZymes profiles. Rhodobacteraceae and Flavobacteriaceae families were abundant across all microalgal hosts, but I .galbana microbiomes diverged further from T. suecica and C. weissflogii microbiomes. I .galbana microbiomes had a much higher relative abundance of Flavobacteriaceae, whereas the two other algal microbiomes had higher relative abundances of Rhodobacteraceae. This could be due to the mixotrophic nature of I. galbana affecting the carbohydrate composition available to the microbiomes, which was supported by the CAZymes profile of I. galbana microbiomes diverging further from those of T. suecica and C. weissflogii microbiomes. Finally, the presence of denitrification and other anaerobic pathways was found exclusively in microbiomes of C. weissflogii potentially resulting from anoxic microenvironments in aggregates formed by this diatom during the experiment. These results underline the deterministic role of the microalgal host species on microbiome composition and functional profiles along with other factors, such as trophic mode of the microalgal host. |
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| Item Description: |
Preprint article before certification by peer review. |
| College: |
Faculty of Science and Engineering |