Dataset Information

Genome Sequence of Halomonas sp. Strain MS1, a Metallophore-Producing, Algal Growth-Promoting Marine Bacterium Isolated from the Green Seaweed Ulva mutabilis (Chlorophyta).

ABSTRACT: We report the draft genome sequence of the marine gammaproteobacterium Halomonas sp. strain MS1, isolated from the green seaweed Ulva mutabilis (Chlorophyta), which releases metallophores fostering macroalga-bacterium interactions. The 4.6-Mbp sequence, which was obtained using PacBio technology, harbors 4,166 predicted coding sequences, including gene clusters for siderophore production.

SUBMITTER: Morales-Reyes CF

PROVIDER: S-EPMC9670981 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature

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Genome Sequence of <i>Halomonas</i> sp. Strain MS1, a Metallophore-Producing, Algal Growth-Promoting Marine Bacterium Isolated from the Green Seaweed Ulva mutabilis (Chlorophyta).

Morales-Reyes Cristina F CF Ghaderiardakani Fatemeh F Wichard Thomas T

Microbiology resource announcements 20221004 11

We report the draft genome sequence of the marine gammaproteobacterium <i>Halomonas</i> sp. strain MS1, isolated from the green seaweed Ulva mutabilis (Chlorophyta), which releases metallophores fostering macroalga-bacterium interactions. The 4.6-Mbp sequence, which was obtained using PacBio technology, harbors 4,166 predicted coding sequences, including gene clusters for siderophore production. ...[more]

PMID: 36194130

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Project description:Reef-building corals form a complex consortium with photosynthetic algae in the family Symbiodiniaceae and bacteria, collectively termed the coral holobiont. These bacteria are hypothesized to be involved in the stress resistance of the coral holobiont, but their functional roles remain largely elusive. Here, we show that cultured Symbiodiniaceae algae isolated from the reef-building coral Galaxea fascicularis are associated with novel bacteria affiliated with the family Flavobacteriaceae Antibiotic treatment eliminated the bacteria from cultured Symbiodiniaceae, resulting in a decreased maximum quantum yield of PSII (variable fluorescence divided by maximum fluorescence [Fv/Fm]) and an increased production of reactive oxygen species (ROS) under thermal and light stresses. We then isolated this bacterial strain, named GF1. GF1 inoculation in the antibiotic-treated Symbiodiniaceae cultures restored the Fv/Fm and reduced the ROS production. Furthermore, we found that GF1 produces the carotenoid zeaxanthin, which possesses potent antioxidant activity. Zeaxanthin supplementation to cultured Symbiodiniaceae ameliorated the Fv/Fm and ROS production, suggesting that GF1 mitigates thermal and light stresses in cultured Symbiodiniaceae via zeaxanthin production. These findings could advance our understanding of the roles of bacteria in Symbiodiniaceae and the coral holobiont, thereby contributing to the development of novel approaches toward coral protection through the use of symbiotic bacteria and their metabolites.IMPORTANCE Occupying less than 1% of the seas, coral reefs are estimated to harbor ∼25% of all marine species. However, the destruction of coral reefs has intensified in the face of global climate changes, such as rising seawater temperatures, which induce the overproduction of reactive oxygen species harmful to corals. Although reef-building corals form complex consortia with bacteria and photosynthetic endosymbiotic algae of the family Symbiodiniaceae, the functional roles of coral-associated bacteria remain largely elusive. By manipulating the Symbiodiniaceae bacterial community, we demonstrated that a bacterium that produces an antioxidant carotenoid could mitigate thermal and light stresses in cultured Symbiodiniaceae isolated from a reef-building coral. Therefore, this study illuminates the unexplored roles of coral-associated bacteria under stressful conditions.

Dataset Information

Genome Sequence of Halomonas sp. Strain MS1, a Metallophore-Producing, Algal Growth-Promoting Marine Bacterium Isolated from the Green Seaweed Ulva mutabilis (Chlorophyta).

Publications

Genome Sequence of <i>Halomonas</i> sp. Strain MS1, a Metallophore-Producing, Algal Growth-Promoting Marine Bacterium Isolated from the Green Seaweed Ulva mutabilis (Chlorophyta).

Similar Datasets

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