Evidence map›Paper›PMID 34767672›Full record

ArticleThe Plant journal : for cell and molecular biology2022

Search for evolutionary roots of land plant arabinogalactan-proteins in charophytes: presence of a rhamnogalactan-protein in Spirogyra pratensis (Zygnematophyceae).

Lukas Pfeifer, Jon Utermöhlen, Kathrin Happ, Charlotte Permann, Andreas Holzinger, Klaus von Schwartzenberg, Birgit Classen

Open access · hybridAbstract readComparative Study
In one paragraph

Article in The Plant journal : for cell and molecular biology, 2022. 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
4.9field-weighted citation impact, top 5% 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, 32 citations in OpenAlex.

  1. Article
  2. Article
  3. Review
  4. Article
  5. Arabinogalactan-proteins of the eusporangiate fernCell surface (Amsterdam, Netherlands) · 2025
    Article
  6. Article
  7. Zygospore formation in Zygnematophyceae predates several land plant traits.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2024
    Review
  8. Zygospore development ofFrontiers in plant science · 2024
    Article
  9. Review
  10. Review
  11. Article
  12. Article
  13. Article
  14. Review
  15. Arabinogalactan Protein-Like Proteins FromFrontiers in plant science · 2022
    Article
  16. Zygospores of the green algaFrontiers in plant science · 2022
    Article
  17. Frontiers in plant science · 2022
    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

7 authors at 3 institutions in 2 countries.

Lukas PfeiferDepartment of Pharmaceutical Biology, Pharmaceutical Institute, Christian-Albrechts-University of Kiel, Kiel, 24118, Germany.ORCID 0000-0002-7076-4597
Jon UtermöhlenDepartment of Pharmaceutical Biology, Pharmaceutical Institute, Christian-Albrechts-University of Kiel, Kiel, 24118, Germany.
Kathrin HappDepartment of Pharmaceutical Biology, Pharmaceutical Institute, Christian-Albrechts-University of Kiel, Kiel, 24118, Germany.
Charlotte PermannDepartment of Botany, Functional Plant Biology, University of Innsbruck, Innsbruck, 6020, Austria.ORCID 0000-0003-0276-6053
Andreas HolzingerDepartment of Botany, Functional Plant Biology, University of Innsbruck, Innsbruck, 6020, Austria.ORCID 0000-0002-7745-3978
Klaus von SchwartzenbergBiocenter Klein Flottbek, University of Hamburg, Hamburg, 22609, Germany.
Birgit ClassenDepartment of Pharmaceutical Biology, Pharmaceutical Institute, Christian-Albrechts-University of Kiel, Kiel, 24118, Germany.ORCID 0000-0003-1452-801X
Christian-Albrechts-Universität zu Kiel · DEUniversität Innsbruck · ATUniversität Hamburg · DE

Funding

Austrian Science Fund FWF P 34181
6 · The paper itself

Abstract

Charophyte green algae (CGA) are assigned to be the closest relatives of land plants and therefore enlighten processes in the colonization of terrestrial habitats. For the transition from water to land, plants needed significant physiological and structural changes, as well as with regard to cell wall composition. Sequential extraction of cell walls of Nitellopsis obtusa (Charophyceae) and Spirogyra pratensis (Zygnematophyceae) offered a comparative overview on cell wall composition of late branching CGA. Because arabinogalactan-proteins (AGPs) are considered common for all land plant cell walls, we were interested in whether these special glycoproteins are present in CGA. Therefore, we investigated both species with regard to characteristic features of AGPs. In the cell wall of Nitellopsis, no hydroxyproline was present and no AGP was precipitable with the β-glucosyl Yariv's reagent (βGlcY). By contrast, βGlcY precipitation of the water-soluble cell wall fraction of Spirogyra yielded a glycoprotein fraction rich in hydroxyproline, indicating the presence of AGPs. Putative AGPs in the cell walls of non-conjugating Spirogyra filaments, especially in the area of transverse walls, were detected by staining with βGlcY. Labelling increased strongly in generative growth stages, especially during zygospore development. Investigations of the fine structure of the glycan part of βGlcY-precipitated molecules revealed that the galactan backbone resembled that of AGPs with 1,3- 1,6- and 1,3,6-linked Galp moieties. Araf was present only in small amounts and the terminating sugars consisted predominantly of pyranosidic terminal and 1,3-linked rhamnose residues. We introduce the term 'rhamnogalactan-protein' for this special AGP-modification present in S. pratensis.

Indexed as

Biological EvolutionCell WallCharophyceaeEmbryophytaGalactansMucoproteinsPlant ProteinsSpirogyraGalactansMucoproteinsPlant Proteinsarabinogalactan-proteinscell wallCharophyceaecharophyte algaeNitellopsis obtuseplant evolutionpolysaccharidesSpirogyra pratensisterrestrializationYariv’s reagentZygnematophyceae

Identifiers

PMID34767672
PMCPMC7612518
OpenAlexW3214668847

What OpenQuestion holds

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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.