ArticleThe ISME journal2017
Complex N acquisition by soil diazotrophs: how the ability to release exoenzymes affects N fixation by terrestrial free-living diazotrophs.
Article in The ISME journal, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.
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Who cites it
22 citing papers in PubMed.
- Iron plaques as terminal electron acceptors optimize clostridial fermentation and nitrogen fixation in rice rhizospheres.The ISME journal · 2026Article
- Enhancing biological nitrogen fixation in rice paddy ecosystems: challenges, opportunities, and sustainable strategies.Frontiers in microbiology · 2026Review
- Modification of nifL-nifA operon of Klebsiella oxytoca improves NArchives of microbiology · 2025Article
- Large-scale experimental evidence of carbon-mediated N and P co-amplification in proglacial soils.Nature communications · 2025Article
- Global patterns of nutrient limitation in soil microorganisms.Proceedings of the National Academy of Sciences of the United States of America · 2025Article
- Soil microclimate and vegetation dynamics shape elevational and seasonal variations of diazotrophic communities in alpine grasslands.Frontiers in plant science · 2025Article
- Arsenic-induced enhancement of diazotrophic recruitment and nitrogen fixation in Pteris vittata rhizosphere.Nature communications · 2024Article
- Plant roots affect free-living diazotroph communities in temperate grassland soils despite decades of fertilization.Communications biology · 2024Article
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- From Lab to Farm: Elucidating the Beneficial Roles of Photosynthetic Bacteria in Sustainable Agriculture.Microorganisms · 2021Review
- Effects of agrochemicals on the beneficial plant rhizobacteria in agricultural systems.Environmental science and pollution research international · 2021Review
- RNA-Seq Provides New Insights into the Gene Expression Changes inMicroorganisms · 2021Article
- Article
- Seasonal and long-term effects of nutrient additions and liming on the nifH gene in cerrado soils under native vegetation.iScience · 2021Article
- The effects of silver nanoparticles on the microbial nitrogen cycle: a review of the known risks.Environmental science and pollution research international · 2020Review
- Assessment of DiazotrophicFrontiers in microbiology · 2020Article
- High Genetic Potential for Proteolytic Decomposition in Northern Peatland Ecosystems.Applied and environmental microbiology · 2019Article
- To Fix or Not To Fix: Controls on Free-Living Nitrogen Fixation in the Rhizosphere.Applied and environmental microbiology · 2019Review
- Distributions of Extracellular Peptidases Across Prokaryotic Genomes Reflect Phylogeny and Habitat.Frontiers in microbiology · 2019Article
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2 authors.
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No grant is acknowledged in the PubMed record.
Abstract
Terrestrial systems support a variety of free-living soil diazotrophs, which can fix nitrogen (N) outside of plant associations. However, owing to the metabolic costs associated with N fixation, free-living soil diazotrophs likely rely on soil N to satisfy the majority of cellular N demand and only fix atmospheric N under certain conditions. Culture-based studies and genomic data show that many free-living soil diazotrophs can access high-molecular weight organic soil N by releasing N-acquiring enzymes such as proteases and chitinases into the extracellular environment. Here, we formally propose a N acquisition strategy used by free-living diazotrophs that accounts for high-molecular weight N acquisition through exoenzyme release by these organisms. We call this the 'LAH N-acquisition strategy' for the preferred order of N pools used once inorganic soil N is limiting: (1) low-molecular weight organic N, (2) atmospheric N and (3) high-molecular weight organic N. In this framework, free-living diazotrophs primarily use biological N fixation (BNF) as a short-term N acquisition strategy to offset the cellular N lost in exoenzyme excretion as low-molecular weight N becomes limiting. By accounting for exoenzyme release by free-living diazotrophs within a cost-benefit framework, investigation of the LAH N acquisition strategy will contribute to a process-level understanding of BNF in soil environments.
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