Functional Insights into the Kelp Microbiome from Metagenome-Assembled Genomes
Eukaryotic organisms evolved in a microbial world and often have intimate associations with diverse bacterial groups. Kelp, brown macroalgae in the order Laminariales, play a vital role in coastal ecosystems, yet we know little about the functional role of the microbial symbionts that cover their ph...
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ftpubmed:oai:pubmedcentral.nih.gov:9238374 2023-05-15T15:13:36+02:00 Functional Insights into the Kelp Microbiome from Metagenome-Assembled Genomes Weigel, Brooke L. Miranda, Khashiff K. Fogarty, Emily C. Watson, Andrea R. Pfister, Catherine A. 2022-06-01 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9238374/ http://www.ncbi.nlm.nih.gov/pubmed/35642511 https://doi.org/10.1128/msystems.01422-21 en eng American Society for Microbiology http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9238374/ http://www.ncbi.nlm.nih.gov/pubmed/35642511 http://dx.doi.org/10.1128/msystems.01422-21 Copyright © 2022 Weigel et al. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International license (https://creativecommons.org/licenses/by/4.0/) . CC-BY mSystems Research Article Text 2022 ftpubmed https://doi.org/10.1128/msystems.01422-21 2022-07-03T00:57:08Z Eukaryotic organisms evolved in a microbial world and often have intimate associations with diverse bacterial groups. Kelp, brown macroalgae in the order Laminariales, play a vital role in coastal ecosystems, yet we know little about the functional role of the microbial symbionts that cover their photosynthetic surfaces. Here, we reconstructed 79 bacterial metagenome-assembled genomes (MAGs) from blades of the bull kelp, Nereocystis luetkeana, allowing us to determine their metabolic potential and functional roles. Despite the annual life history of bull kelp, nearly half of the bacterial MAGs were detected across multiple years. Diverse members of the kelp microbiome, spanning 6 bacterial phyla, contained genes for transporting and assimilating dissolved organic matter (DOM), which is secreted by kelp in large quantities and likely fuels the metabolism of these heterotrophic bacteria. Bacterial genomes also contained alginate lyase and biosynthesis genes, involved in polysaccharide degradation and biofilm formation, respectively. Kelp-associated bacterial genomes contained genes for dissimilatory nitrate reduction and urea hydrolysis, likely providing a reduced source of nitrogen to the host kelp. The genome of the most abundant member of the kelp microbiome and common macroalgal symbiont, Granulosicoccus, contained a full suite of genes for synthesizing cobalamin (vitamin B(12)), suggesting that kelp-associated bacteria have the potential to provide their host kelp with vitamins. Finally, kelp-associated Granulosicoccus contained genes that typify the aerobic anoxygenic phototrophic bacteria, including genes for bacteriochlorophyll synthesis and photosystem II reaction center proteins, making them the first known photoheterotrophic representatives of this genus. IMPORTANCE Kelp (brown algae in the order Laminariales) are foundational species that create essential habitat in temperate and arctic coastal marine ecosystems. These photosynthetic giants host millions of microbial taxa whose functions are relatively ... Text Arctic PubMed Central (PMC) Arctic mSystems 7 3 |
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Research Article Weigel, Brooke L. Miranda, Khashiff K. Fogarty, Emily C. Watson, Andrea R. Pfister, Catherine A. Functional Insights into the Kelp Microbiome from Metagenome-Assembled Genomes |
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Research Article |
description |
Eukaryotic organisms evolved in a microbial world and often have intimate associations with diverse bacterial groups. Kelp, brown macroalgae in the order Laminariales, play a vital role in coastal ecosystems, yet we know little about the functional role of the microbial symbionts that cover their photosynthetic surfaces. Here, we reconstructed 79 bacterial metagenome-assembled genomes (MAGs) from blades of the bull kelp, Nereocystis luetkeana, allowing us to determine their metabolic potential and functional roles. Despite the annual life history of bull kelp, nearly half of the bacterial MAGs were detected across multiple years. Diverse members of the kelp microbiome, spanning 6 bacterial phyla, contained genes for transporting and assimilating dissolved organic matter (DOM), which is secreted by kelp in large quantities and likely fuels the metabolism of these heterotrophic bacteria. Bacterial genomes also contained alginate lyase and biosynthesis genes, involved in polysaccharide degradation and biofilm formation, respectively. Kelp-associated bacterial genomes contained genes for dissimilatory nitrate reduction and urea hydrolysis, likely providing a reduced source of nitrogen to the host kelp. The genome of the most abundant member of the kelp microbiome and common macroalgal symbiont, Granulosicoccus, contained a full suite of genes for synthesizing cobalamin (vitamin B(12)), suggesting that kelp-associated bacteria have the potential to provide their host kelp with vitamins. Finally, kelp-associated Granulosicoccus contained genes that typify the aerobic anoxygenic phototrophic bacteria, including genes for bacteriochlorophyll synthesis and photosystem II reaction center proteins, making them the first known photoheterotrophic representatives of this genus. IMPORTANCE Kelp (brown algae in the order Laminariales) are foundational species that create essential habitat in temperate and arctic coastal marine ecosystems. These photosynthetic giants host millions of microbial taxa whose functions are relatively ... |
format |
Text |
author |
Weigel, Brooke L. Miranda, Khashiff K. Fogarty, Emily C. Watson, Andrea R. Pfister, Catherine A. |
author_facet |
Weigel, Brooke L. Miranda, Khashiff K. Fogarty, Emily C. Watson, Andrea R. Pfister, Catherine A. |
author_sort |
Weigel, Brooke L. |
title |
Functional Insights into the Kelp Microbiome from Metagenome-Assembled Genomes |
title_short |
Functional Insights into the Kelp Microbiome from Metagenome-Assembled Genomes |
title_full |
Functional Insights into the Kelp Microbiome from Metagenome-Assembled Genomes |
title_fullStr |
Functional Insights into the Kelp Microbiome from Metagenome-Assembled Genomes |
title_full_unstemmed |
Functional Insights into the Kelp Microbiome from Metagenome-Assembled Genomes |
title_sort |
functional insights into the kelp microbiome from metagenome-assembled genomes |
publisher |
American Society for Microbiology |
publishDate |
2022 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9238374/ http://www.ncbi.nlm.nih.gov/pubmed/35642511 https://doi.org/10.1128/msystems.01422-21 |
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9238374/ http://www.ncbi.nlm.nih.gov/pubmed/35642511 http://dx.doi.org/10.1128/msystems.01422-21 |
op_rights |
Copyright © 2022 Weigel et al. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International license (https://creativecommons.org/licenses/by/4.0/) . |
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CC-BY |
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https://doi.org/10.1128/msystems.01422-21 |
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