AI Article Synopsis

  • Oligotrophs dominate in low-nutrient environments, but this study highlights how copiotrophic bacteria can also thrive in such conditions, isolating 648 strains from seawater samples collected at various depths in the South China Sea.
  • The majority of these strains (99.4%) belong to the Pseudomonadota phylum, primarily in the Gammaproteobacteria class, indicating a rich diversity among the isolated species, including notable ones like Pseudoalteromonas arabiensis.
  • Many of the species showed metabolic capabilities such as nitrate reduction and sulfur metabolism, and possessed key enzymes involved in breaking down carbohydrates like chitin, starch, and cellulose, pointing to their ecological significance in nutrient-poor marine

Article Abstract

Oligotrophs are predominant in nutrient-poor environments, but copiotrophic bacteria may tolerate conditions of low energy and can also survive and thrive in these nutrient-limited conditions. In the present study, we isolated 648 strains using a dilution plating method after enrichment for low-nutrient conditions. We collected 150 seawater samples at 21 stations in different parts of the water column at the Zhenbei Seamount in the South China Sea. The 648 isolated copiotrophic strains that could grow on low-nutrient medium were in 21 genera and 42 species. A total of 99.4% (644/648) of the bacteria were in the phylum Pseudomonadota, with 73.3% (472/644) in the class Gammaproteobacteria and 26.7% (172/644) in the class Alphaproteobacteria. Among the 42 representative isolates, Pseudoalteromonas arabiensis, Roseibium aggregatum, and Vibrio neocaledonicus were present in all layers of seawater and at almost all of the stations. Almost half of these species (20/42) contained genes that performed nitrate reduction, with confirmation by nitrate reduction testing. These isolates also contained genes that functioned in sulfur metabolism, including sulfate reduction, thiosulfate oxidation, thiosulfate disproportionation, and dimethylsulfoniopropionate degradation. GH23, CBM50, GT4, GT2, and GT51 were the main carbohydrate-active enzymes (CAZymes), and these five enzymes were present in all or almost all of the isolated strains. The most abundant classes of CAZymes were those associated with the degradation of chitin, starch, and cellulose. Collectively, our study of marine copiotrophic bacteria capable of growing on low-nutrient medium demonstrated the diversity of these species and their potential metabolic characteristics.

Download full-text PDF

Source
http://dx.doi.org/10.1007/s00248-024-02475-zDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11663183PMC

Publication Analysis

Top Keywords

copiotrophic bacteria
12
low-nutrient medium
12
potential metabolic
8
metabolic characteristics
8
grow low-nutrient
8
zhenbei seamount
8
seamount south
8
south china
8
china sea
8
contained genes
8

Similar Publications

Oligotrophs are predominant in nutrient-poor environments, but copiotrophic bacteria may tolerate conditions of low energy and can also survive and thrive in these nutrient-limited conditions. In the present study, we isolated 648 strains using a dilution plating method after enrichment for low-nutrient conditions. We collected 150 seawater samples at 21 stations in different parts of the water column at the Zhenbei Seamount in the South China Sea.

View Article and Find Full Text PDF

Multifaceted interactions between marine bacteria and particulate matter exert a major control over the biogeochemical cycles in the oceans. At the microbial scale, free-living bacteria benefit from encountering and harnessing the plumes around nutrient-releasing particles, like phyto-plankton and organic aggregates. However, our understanding of the bacterial potential to reshape these eutrophic microhabitats remains poor, in part because of the traditional focus on fast-moving particles that generate ephemeral plumes with lifetime shorter than the uptake timescale.

View Article and Find Full Text PDF

Pints of the past, flavours for the future.

Fungal Biol

December 2024

Faculty of Health Sciences and Wellbeing, University of Sunderland, Science Complex, City Campus, SUNDERLAND, SR1 3SD, UK; Brewlab Limited, Unit 1 West Quay Court, Sunderland Enterprise Park, Sunderland, Tyne and Wear, SR5 2TE, UK. Electronic address:

The recreation of historic beverages is possible via contemporary fermentations carried out with microbes revived form the past. Advanced molecular techniques have recently provided opportunities to investigate historic samples, such as those from beer found in shipwrecks, and provide data on their character as well as identifying differences with contemporary products. In some cases, isolates of yeasts and bacteria create the possibility for authentic recreations of fermented beverages that can have cultural and nostalgic interest.

View Article and Find Full Text PDF

Bioenhanced remediation of dibutyl phthalate contaminated black soil by immobilized biochar microbiota.

J Environ Manage

November 2024

School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, China. Electronic address:

Article Synopsis
  • A new bioremediation material (BHF@DK-P3) combining humic acid, iron-modified corn stover biochar, and beneficial bacteria was developed to tackle contamination from DBP residues in black soils.
  • The included microbiota, consisting of DBP-degrading and nutrient-solubilizing bacteria, formed a strong partnership that enhanced soil health and nutrient availability.
  • The application of BHF@DK-P3 improved soil structure and nutrient levels, increasing available phosphorus by 21.45%, potassium by 12.54%, and nitrogen by 14.74%, while stabilizing microbial functions under DBP and pH stress.
View Article and Find Full Text PDF

Divergent responses of the native grassland soil microbiome to heavy grazing between spring and fall.

Microbiology (Reading)

November 2024

Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, 5403 - 1st Avenue South, Lethbridge, Alberta, T1J 4B1, Canada.

Grasslands are estimated to cover about 40% of the earth's land area and are primarily used for grazing. Despite their importance globally, there is a paucity of information on long-term grazing effects on the soil microbiome. We used a 68-year-old grazing experiment to determine differences in the soil permanganate-oxidizable C (POXC), microbial biomass C (MBC), the soil prokaryotic (bacterial and archaeal) community composition and enzyme activities between no-grazing, light grazing and heavy grazing, i.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!

A PHP Error was encountered

Severity: Notice

Message: fwrite(): Write of 34 bytes failed with errno=28 No space left on device

Filename: drivers/Session_files_driver.php

Line Number: 272

Backtrace:

A PHP Error was encountered

Severity: Warning

Message: session_write_close(): Failed to write session data using user defined save handler. (session.save_path: /var/lib/php/sessions)

Filename: Unknown

Line Number: 0

Backtrace: