Evidence map›Paper›PMID 27007210›Full record

ArticleJournal of phycology2013

Whole genome comparison of six Crocosphaera watsonii strains with differing phenotypes.

Shellie R Bench, Philip Heller, Ildiko Frank, Martha Arciniega, Irina N Shilova, Jonathan P Zehr

Open access · hybridAbstract read
In one paragraph

Article in Journal of phycology, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers.

0numbers the graph read from it
0cells of the map it votes in
18citing papers in PubMed
7.9field-weighted citation impact, top 3% 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

18 citing papers in PubMed, 54 citations in OpenAlex.

  1. Characterization of phytoplankton-excreted metabolites mediating carbon flux through the surface ocean.Proceedings of the National Academy of Sciences of the United States of America · 2026
    Article
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  9. Fluorescence recovery protein: a powerful yet underexplored regulator of photoprotection in cyanobacteria†.Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology · 2020
    Review
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  17. Trichodesmium genome maintains abundant, widespread noncoding DNA in situ, despite oligotrophic lifestyle.Proceedings of the National Academy of Sciences of the United States of America · 2015
    Article
  18. 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 1 institution in 1 country.

Shellie R BenchOcean Sciences Department, University of California Santa Cruz, 1156 High Street, Earth & Marine Sciences Bldg, Santa Cruz, CA, 95064, USA.
Philip HellerOcean Sciences Department, University of California Santa Cruz, 1156 High Street, Earth & Marine Sciences Bldg, Santa Cruz, CA, 95064, USA.
Ildiko FrankOcean Sciences Department, University of California Santa Cruz, 1156 High Street, Earth & Marine Sciences Bldg, Santa Cruz, CA, 95064, USA.
Martha ArciniegaOcean Sciences Department, University of California Santa Cruz, 1156 High Street, Earth & Marine Sciences Bldg, Santa Cruz, CA, 95064, USA.
Irina N ShilovaOcean Sciences Department, University of California Santa Cruz, 1156 High Street, Earth & Marine Sciences Bldg, Santa Cruz, CA, 95064, USA.
Jonathan P ZehrOcean Sciences Department, University of California Santa Cruz, 1156 High Street, Earth & Marine Sciences Bldg, Santa Cruz, CA, 95064, USA.
University of California, Santa Cruz · US

Funding

UCSC Research Mentoring Internship Program: An Initiative to Increase Diversity and Inclusion in Genomics ResearchR25HG006836 · NHGRI · UNIVERSITY OF CALIFORNIA SANTA CRUZ · PI BROOKS, ANGELA NORIE, RAMON, MARINA L · 2013 to 2025
$3.7M
NHGRI NIH HHS R25 HG006836
6 · The paper itself

Abstract

Crocosphaera watsonii, a unicellular nitrogen-fixing cyanobacterium found in oligotrophic oceans, is important in marine carbon and nitrogen cycles. Isolates of C. watsonii can be separated into at least two phenotypes with environmentally important differences, indicating possibly distinct ecological roles and niches. To better understand the evolutionary history and variation in metabolic capabilities among strains and phenotypes, this study compared the genomes of six C. watsonii strains, three from each phenotypic group, which had been isolated over several decades from multiple ocean basins. While a substantial portion of each genome was nearly identical to sequences in the other strains, a few regions were identified as specific to each strain and phenotype, some of which help explain observed phenotypic features. Overall, the small-cell type strains had smaller genomes and a relative loss of genetic capabilities, while the large-cell type strains were characterized by larger genomes, some genetic redundancy, and potentially increased adaptations to iron and phosphorus limitation. As such, strains with shared phenotypes were evolutionarily more closely related than those with the opposite phenotype, regardless of isolation location or date. Unexpectedly, the genome of the type-strain for the species, C. watsonii WH8501, was quite unusual even among strains with a shared phenotype, indicating it may not be an ideal representative of the species. The genome sequences and analyses reported in this study will be important for future investigations of the proposed differences in adaptation of the two phenotypes to nutrient limitation, and to identify phenotype-specific distributions in natural Crocosphaera populations.

Indexed as

exopolysaccharide biosynthesisgenome comparisongenome evolutionmarine cyanobacterianitrogen fixation

Identifiers

PMID27007210
PMCPMC5945289
OpenAlexW2047614254

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
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.