Evidence map›Paper›PMID 34402646›Full record

ArticlemSystems2021

Soil Candidate Phyla Radiation Bacteria Encode Components of Aerobic Metabolism and Co-occur with Nanoarchaea in the Rare Biosphere of Rhizosphere Grassland Communities.

Alexa M Nicolas, Alexander L Jaffe, Erin E Nuccio, Michiko E Taga, Mary K Firestone, Jillian F Banfield

Open access · goldAbstract read
In one paragraph

Article in mSystems, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 45 papers.

0numbers the graph read from it
0cells of the map it votes in
45citing papers in PubMed
8.9field-weighted citation impact, top 2% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

45 citing papers in PubMed, 66 citations in OpenAlex.

  1. Article
  2. A Novel Pilus System in Candidate Phyla Radiation Bacteria.bioRxiv : the preprint server for biology · 2026
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  14. Codon bias, nucleotide selection, and genome size predict in situ bacterial growth rate and transcription in rewetted soil.Proceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  15. Article
  16. Review
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  19. Beyond genomics in Patescibacteria: A trove of unexplored biology packed into ultrasmall bacteria.Proceedings of the National Academy of Sciences of the United States of America · 2024
    Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 4 institutions in 1 country.

Alexa M NicolasDepartment of Plant and Microbial Biology, University of California, Berkeleygrid.47840.3f, Berkeley, California, USA.
Alexander L JaffeDepartment of Plant and Microbial Biology, University of California, Berkeleygrid.47840.3f, Berkeley, California, USA.
Erin E NuccioNuclear and Chemical Sciences Division, Lawrence Livermore National Laboratorygrid.250008.f, Livermore, California, USA.
Michiko E TagaDepartment of Plant and Microbial Biology, University of California, Berkeleygrid.47840.3f, Berkeley, California, USA.
Mary K FirestoneDepartment of Environmental Science, Policy, and Management, University of California, Berkeleygrid.47840.3f, Berkeley, California, USA.
Jillian F BanfieldDepartment of Environmental Science, Policy, and Management, University of California, Berkeleygrid.47840.3f, Berkeley, California, USA.
University of California, Berkeley · USLawrence Berkeley National Laboratory · USLawrence Livermore National Laboratory · USPlanetary Science Institute · US

Funding

Targeted Killing of Bacteria in CommunitiesDP2AI117984 · NIAID · UNIVERSITY OF CALIFORNIA BERKELEY · PI TAGA, MICHIKO E. · 2014 to 2014
$2.3M
Chan Zuckerberg Initiative (CZI)DOE | NNSA | LDRD | Lawrence Livermore National Laboratory (LLNL) 18-ERD-041HHS | National Institutes of Health (NIH) DP2AI117984Innovative Genomics Institute (IGI)NIAID NIH HHS DP2 AI117984U.S. Department of Energy (DOE) DE-SC0020163U.S. Department of Energy (DOE) SCW1678
6 · The paper itself

Abstract

Candidate Phyla Radiation (CPR) bacteria and nanoarchaea populate most ecosystems but are rarely detected in soil. We concentrated particles of less than 0.2 μm in size from grassland soil, enabling targeted metagenomic analysis of these organisms, which are almost totally unexplored in largely oxic environments such as soil. We recovered a diversity of CPR bacterial and some archaeal sequences but no sequences from other cellular organisms. The sampled sequences include Doudnabacteria (SM2F11) and Pacearchaeota, organisms rarely reported in soil, as well as Saccharibacteria, Parcubacteria, and Microgenomates. CPR and archaea of the phyla Diapherotrites, Parvarchaeota, Aenigmarchaeota, Nanoarchaeota, and Nanohaloarchaeota (DPANN) were enriched 100- to 1,000-fold compared to that in bulk soil, in which we estimate each of these organisms comprises approximately 1 to 100 cells per gram of soil. Like most CPR and DPANN sequenced to date, we predict these microorganisms live symbiotic anaerobic lifestyles. However, Saccharibacteria, Parcubacteria, and Doudnabacteria genomes sampled here also harbor ubiquinol oxidase operons that may have been acquired from other bacteria, likely during adaptation to aerobic soil environments. We conclude that CPR bacteria and DPANN archaea are part of the rare soil biosphere and harbor unique metabolic platforms that potentially evolved to live symbiotically under relatively oxic conditions.

Indexed as

archaeabacteriaCPRDPANNenvironmental microbiologymetagenomicssoilsoil microbiologysymbiosis

Identifiers

PMID34402646
PMCPMC8407418
OpenAlexW3194741059

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.