ArticleThe ISME journal2014
Gammaproteobacterial diazotrophs and nifH gene expression in surface waters of the South Pacific Ocean.
Article in The ISME journal, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 39 papers.
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39 citing papers in PubMed, 130 citations in OpenAlex.
- Sulfur-cycling diazotrophs dominate nitrogen fixation in seagrass sediments.Applied and environmental microbiology · 2026Article
- Significant contribution of the unicellular cyanobacterium UCYN-B to oceanic nitrogen fixation.National science review · 2025Article
- Unveiling the contribution of particle-associated non-cyanobacterial diazotrophs to NCommunications biology · 2025Article
- Synergistic interaction between microbial nitrogen fixation and iron reduction in the environment.The ISME journal · 2025Article
- Dynamics of diazotroph particle colonization in the Arctic Ocean.The ISME journal · 2025Article
- Article
- Organic metabolite uptake by diazotrophs in the North Pacific Ocean.ISME communications · 2025Article
- Chemolithoautotrophic diazotrophs dominate dark nitrogen fixation in mangrove sediments.The ISME journal · 2024Article
- Non-cyanobacterial diazotrophs: global diversity, distribution, ecophysiology, and activity in marine waters.FEMS microbiology reviews · 2023Review
- Cell-specific measurements show nitrogen fixation by particle-attached putative non-cyanobacterial diazotrophs in the North Pacific Subtropical Gyre.Nature communications · 2022Article
- Phylogenetically and catabolically diverse diazotrophs reside in deep-sea cold seep sediments.Nature communications · 2022Article
- Transcriptional responses of Trichodesmium to natural inverse gradients of Fe and P availability.The ISME journal · 2022Article
- Article
- Planktonic Aggregates as Hotspots for Heterotrophic Diazotrophy: The Plot Thickens.Frontiers in microbiology · 2022Review
- Independence of a Marine Unicellular Diazotroph to the Presence of NOMicroorganisms · 2021Article
- Comparison of Diazotrophic Composition and Distribution in the South China Sea and the Western Pacific Ocean.Biology · 2021Article
- Investigating the microbial ecology of coastal hotspots of marine nitrogen fixation in the western North Atlantic.Scientific reports · 2021Article
- Article
- Unexpected presence of the nitrogen-fixing symbiotic cyanobacterium UCYN-A in Monterey Bay, California.Journal of phycology · 2020Article
- Distinct Intra-lake Heterogeneity of Diazotrophs in a Deep Oligotrophic Mountain Lake.Microbial ecology · 2020Article
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Authors and funding
5 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
In addition to the cyanobacterial N2-fixers (diazotrophs), there is a high nifH gene diversity of non-cyanobacterial groups present in marine environments, yet quantitative information about these groups is scarce. N2 fixation potential (nifH gene expression), diversity and distributions of the uncultivated diazotroph phylotype γ-24774A11, a putative gammaproteobacterium, were investigated in the western South Pacific Ocean. γ-24774A11 gene copies correlated positively with diazotrophic cyanobacteria, temperature, dissolved organic carbon and ambient O2 saturation, and negatively with depth, chlorophyll a and nutrients, suggesting that carbon supply, access to light or inhibitory effects of DIN may control γ-24774A11 abundances. Maximum nifH gene-copy abundance was 2 × 10(4) l(-1), two orders of magnitude less than that for diazotrophic cyanobacteria, while the median γ-24774A11 abundance, 8 × 10(2) l(-1), was greater than that for the UCYN-A cyanobacteria, suggesting a more homogeneous distribution in surface waters. The abundance of nifH transcripts by γ-24774A11 was greater during the night than during the day, and the transcripts generally ranged from 0-7%, but were up to 26% of all nifH transcripts at each station. The ubiquitous presence and low variability of γ-24774A11 abundances across tropical and subtropical oceans, combined with the consistent nifH expression reported in this study, suggest that γ-24774A11 could be one of the most important heterotrophic (or photoheterotrophic) diazotrophs and may need to be considered in future N budget estimates and models.
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