Evidence map›Paper›PMID 12527781›Full record

ArticleNucleic acids research2003

The complete nucleotide sequence of the hornwort (Anthoceros formosae) chloroplast genome: insight into the earliest land plants.

Masanori Kugita, Akira Kaneko, Yuhei Yamamoto, Yuko Takeya, Tohoru Matsumoto, Koichi Yoshinaga

Open access · bronzeAbstract read
In one paragraph

Article in Nucleic acids research, 2003. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 44 papers.

0numbers the graph read from it
0cells of the map it votes in
44citing papers in PubMed
15.9field-weighted citation impact, top 1% 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

44 citing papers in PubMed, 175 citations in OpenAlex.

  1. The Complete Chloroplast Genome and the Phylogenetic Analysis ofInternational journal of molecular sciences · 2025
    Article
  2. The Complete Chloroplast Genome and the Phylogenetic Analysis ofInternational journal of molecular sciences · 2025
    Article
  3. Complete chloroplast genomes of threeFrontiers in plant science · 2025
    Article
  4. The complete chloroplast genome ofMitochondrial DNA. Part B, Resources · 2025
    Article
  5. Article
  6. Article
  7. Article
  8. Complete chloroplast genome ofMitochondrial DNA. Part B, Resources · 2023
    Article
  9. Article
  10. Comparative Analysis of Whole Chloroplast Genomes of Three Common Species ofInternational journal of molecular sciences · 2022
    Article
  11. Article
  12. Article
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  14. Article
  15. Article
  16. Article
  17. The complete chloroplast genome characteristics ofMitochondrial DNA. Part B, Resources · 2021
    Article
  18. Article
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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.

Masanori KugitaGraduate School of Science and Engineering, Shizuoka University, Oya 836, 422-8529 Shizuoka, Japan.
Akira Kaneko
Yuhei Yamamoto
Yuko Takeya
Tohoru Matsumoto
Koichi Yoshinaga
Graduate School USA · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

It is generally believed that bryophytes are the earliest land plants. However, the phylogenetic relationships among bryophytes, including mosses, liverworts and hornworts, are not clearly resolved. To obtain more information on the earliest land plants, we determined the complete nucleotide sequence of the chloroplast genome from the hornwort Anthoceros formosae. The circular double-stranded DNA of 161 162 bp is the largest genome ever reported among land plant chloroplasts. It contains 76 protein, 32 tRNA and 4 rRNA genes and 10 open reading frames (ORFs), which are identical with the chloroplast genome of the other green plants analyzed. The major difference is a larger inverted repeat than that of the liverwort Marchantia, Anthoceros contains an excess of ndhB and rps7 genes and the 3' exon of rps12. The genes matK and rps15, commonly found in the chloroplast genomes of land plants, are pseudogenes. The intron of rrn23 is the first finding in the known chloroplast genomes of land plants. A striking feature of the hornwort chloroplast is that more than half of the protein-coding genes have nonsense codons, which are converted into sense codons by RNA editing. Maximum-likelihood (ML) analysis, based on 11 518 amino acid sites of 52 proteins encoded in the chloroplast genomes of the green plants, placed liverworts as the sister to all other land plants.

Indexed as

DNA, ChloroplastDNA, CircularGenes, PlantMolecular Sequence DataPhylogenyPlantsRNA EditingSequence Analysis, DNADNA, ChloroplastDNA, Circular

Identifiers

PMID12527781
PMCPMC140519
OpenAlexW2163412729

What OpenQuestion holds

Textmetadata
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.