Current Microbiology, Journal Year: 2024, Volume and Issue: 82(1)
Published: Nov. 29, 2024
Language: Английский
bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown
Published: Feb. 15, 2024
Abstract Heterotrophic bacteria and archaea (‘heteroprokaryotes’) drive global carbon cycling, but how to quantitatively organize their functional complexity remains unclear. We generated a global-scale understanding of marine heteroprokaryotic biogeography by synthesizing genetic sequencing data with mechanistic ecosystem model. incorporated diversity into the trait-based model along two axes: substrate lability growth strategy. Using sequences three ocean transects, we compiled 21 guilds estimated degree optimization for rapid (copiotrophy). Data consistency indicated that gradients in grazing predominantly set biogeographical patterns, identified deep-ocean ‘slow copiotrophs’ whose ecological interactions control surface accumulation dissolved organic carbon.
Language: Английский
Citations
2
European Journal of Soil Science, Journal Year: 2024, Volume and Issue: 75(4)
Published: July 1, 2024
Abstract Rhizodeposition fuels carbon (C) and nutrient cycling in soil. However, changes the dynamics of microbial growth on rhizodeposits with increasing distance from root is not well studied. This study investigates individual organic components maize root‐derived exudates mucilage agricultural By creating a gradient substrate concentrations, we simulated reduced access to rhizosphere C surface. We identified distinct C‐thresholds for activation growth, these were significantly higher than singular, simple sugars. In addition, testing stoichiometric constraints by supplementing nitrogen (N) phosphorus (P) showed accelerated increased activating larger proportion biomass. Early late season triggered different responses. The mineralization early‐season was induced at high C‐threshold. contrast, late‐season ‘sugar‐like’ properties, low C‐threshold, affinity, maximum respiration rate microorganisms growing added substrate. Mucilage exhibited highest C‐threshold although short lag‐period an efficient degradation comparable that determining kinetic parameters turnover times substrates, our data enable upscaling micro‐scale processes whole system, allowing more accurate predictions how rhizodeposition drives
Language: Английский
Citations
1
bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown
Published: March 16, 2024
Summary Rhizodeposition fuels carbon (C) and nutrient cycling in soil. However, the dynamics of microbial growth on rhizodeposits relation to distance from root have not been well studied. This study investigates individual organic components maize root-derived exudates mucilage an agricultural By creating a gradient substrate concentrations, we simulated reduced access rhizosphere C with increasing surface. We identified distinct C-thresholds for activation growth, these were significantly higher compared singular, simple sugars. In addition, testing stoichiometric constraints by supplementing N P showed accelerated increased activating larger proportion biomass. Early late season triggered different responses. The mineralisation early was induced at high C-threshold, whereas ’sugar-like’ properties, low affinity, maximum respiration rate. Mucilage exhibited highest C-threshold although short lag-period efficient degradation comparable that determining kinetic parameters turnover times substrates, our data enable upscaling micro-scale processes whole system, allowing more precise predictions how drive Highlights Growth thresholds than No observed even concentrations. has lag-phase decomposition like sugars but only above threshold. limited
Language: Английский
Citations
0
bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown
Published: Aug. 6, 2024
Abstract Growth rate is a key prokaryotic trait that allows estimating fitness and understanding cell metabolism. While in some clades it has been well studied model organisms, there little data on slow-growing bacteria. In particular, lack of quantitative studies the species Brucella genus. This an important microorganism since causative agent brucellosis, one most widespread bacterial zoonoses affecting several animals, including humans. exhibit approximately 97% genomic similarity. Despite this, show different host preferences, zoonotic risks, pathogenicity. After more than hundred years research, numerous aspects biology, such as vivo vitro growth remain poorly characterized. this work, we analyzed vegetative intracellular classical ( B. abortus 2308, melitensis 16M. suis 1330, ovis , canis ). Strikingly, each displayed particular parameters culture. Doubling time (DT) spanned from 2.7 hs -1 to 18h for . context infection J774A.1 phagocytic cells, DT was higher, but widely varied across species, closely correlating observed Overall, despite high similarity genomes, found species-specific cycle.
Language: Английский
Citations
0
Current Microbiology, Journal Year: 2024, Volume and Issue: 82(1)
Published: Nov. 29, 2024
Language: Английский
Citations
0