Evidence map›Paper›PMID 32185527›Full record

ArticleProtoplasma2020

Evolutionary significance of the ring-like plastid nucleus in the primitive red alga Cyanidioschyzon merolae as revealed by drying.

Tsuneyoshi Kuroiwa, Mio Ohnuma, Yuuta Imoto, Fumi Yagisawa, Osami Misumi, Noriko Nagata, Haruko Kuroiwa

Abstract read
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In one paragraph

Article in Protoplasma, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing papers in PubMed
0.3field-weighted citation impact, top 44% 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

2 citing papers in PubMed, 4 citations in OpenAlex.

  1. Article
  2. 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

7 authors at 5 institutions in 2 countries.

Tsuneyoshi KuroiwaDepartment of Chemical and Biological Sciences, Japan Women's University, 2-8-1 Mejirodai, Bunkyo-ku, Tokyo, 112-8681, Japan. tkuroiwa@fc.jwu.ac.jp.ORCID http://orcid.org/0000-0003-3182-921X
Mio OhnumaInstitute of Technology, Hiroshima College, 4272-1 Higashino, Osakikamijima-cho Toyota-gun, Hiroshima, 725-0231, Japan.
Yuuta ImotoDepartment of Cell Biology, Johns Hopkins University School of Medicine, 725 N. Wolf Street, Biophysics 100, Baltimore, MD, 21205, USA.
Fumi YagisawaCenter for Research Advancement and Collaboration, University of the Ryukyus, Okinawa, 903-0213, Japan.
Osami MisumiDepartment of Biological Science and Chemistry, Faculty of Science, Graduate School of Sciences and Technology for Innovation, Yamaguchi University, Yamaguchi, 753-8512, Japan.
Noriko NagataDepartment of Chemical and Biological Sciences, Japan Women's University, 2-8-1 Mejirodai, Bunkyo-ku, Tokyo, 112-8681, Japan.
Haruko KuroiwaDepartment of Chemical and Biological Sciences, Japan Women's University, 2-8-1 Mejirodai, Bunkyo-ku, Tokyo, 112-8681, Japan.
Japan Women's University · JPJohns Hopkins University · USNational Institute of Technology, Hiroshima College · JPUniversity of the Ryukyus · JPYamaguchi University · JP

Funding

the Japanese Society for the Promotion of Science 11044the Ministry of Education, Culture, Sports, Science and Technology of Japan 16H04813 and 19H03260
6 · The paper itself

Abstract

Primary plastids originated from a free-living cyanobacterial ancestor and possess their own genomes-probably a few DNA copies. These genomes, which are organized in centrally located plastid nuclei (CN-type pt-nuclei), are produced from preexisting plastids by binary division. Ancestral algae with a CN-type pt-nucleus diverged and evolved into two basal eukaryotic lineages: red algae with circular (CL-type) pt-nuclei and green algae with scattered small (SN-type) pt-nuclei. Although the molecular dynamics of pt-nuclei in green algae and plants are now being analyzed, the process of the conversion of the original algae with a CN-type pt-nucleus to red algae with a CL-type one has not been studied. Here, we show that the CN-type pt-nucleus in the primitive red alga Cyanidioschyzon merolae can be changed to the CL-type by application of drying to produce slight cell swelling. This result implies that CN-type pt-nuclei are produced by compact packing of CL-type ones, which suggests that a C. merolae-like alga was the original progenitor of the red algal lineage. We also observed that the CL-type pt-nucleus has a chain-linked bead-like structure. Each bead is most likely a small unit of DNA, similar to CL-type pt-nuclei in brown algae. Our results thus suggest a C. merolae-like alga as the candidate for the secondary endosymbiont of brown algae.

Indexed as

Biological EvolutionCell NucleusPlastidsRhodophytaBrown algaeCyanidioschyzon merolaePlastid nucleusSecondary endocytosisSymbiont

Identifiers

PMID32185527
OpenAlexW3012313664

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.