Evidence map›Paper›PMID 25994183›Full record

ArticleBiology direct2015

Ancient origin of the biosynthesis of lignin precursors.

Leen Labeeuw, Patrick T Martone, Yan Boucher, Rebecca J Case

Open access · goldAbstract read
In one paragraph

Article in Biology direct, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 36 papers.

0numbers the graph read from it
0cells of the map it votes in
36citing papers in PubMed
3.3field-weighted citation impact, top 7% 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

36 citing papers in PubMed, 113 citations in OpenAlex.

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  4. Accessible versatility underpins the deep evolution of plant specialized metabolism.Phytochemistry reviews : proceedings of the Phytochemical Society of Europe · 2025
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  14. Polymyxin BFrontiers in cellular and infection microbiology · 2022
    Article
  15. Insights into the biosynthesis pathway of phenolic compounds in microalgae.Computational and structural biotechnology journal · 2022
    Article
  16. Article
  17. Review
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  19. 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

4 authors at 2 institutions in 1 country.

Leen LabeeuwDepartment of Biological Sciences, University of Alberta, Edmonton, AB, , T6G 2E9, , Canada. labeeuw@ualberta.ca.
Patrick T MartoneDepartment of Botany and Biodiversity Research Centre, University of British, Columbia, BC, , V6T 1Z4, , Canada. patrick.martone@botany.ubc.ca.
Yan BoucherDepartment of Biological Sciences, University of Alberta, Edmonton, AB, , T6G 2E9, , Canada. yboucher@ualberta.ca.
Rebecca J CaseDepartment of Biological Sciences, University of Alberta, Edmonton, AB, , T6G 2E9, , Canada. rcase@ualberta.ca.
University of Alberta · CAUniversity of British Columbia · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundLignin plays an important role in plant structural support and water transport, and is considered one of the hallmarks of land plants. The recent discovery of lignin or its precursors in various algae has raised questions on the evolution of its biosynthetic pathway, which could be much more ancient than previously thought. To determine the taxonomic distribution of the lignin biosynthesis genes, we screened all publicly available genomes of algae and their closest non-photosynthetic relatives, as well as representative land plants. We also performed phylogenetic analysis of these genes to decipher the evolution and origin(s) of lignin biosynthesis.

resultsEnzymes involved in making p-coumaryl alcohol, the simplest lignin monomer, are found in a variety of photosynthetic eukaryotes, including diatoms, dinoflagellates, haptophytes, cryptophytes as well as green and red algae. Phylogenetic analysis of these enzymes suggests that they are ancient and spread to some secondarily photosynthetic lineages when they acquired red and/or green algal endosymbionts. In some cases, one or more of these enzymes was likely acquired through lateral gene transfer (LGT) from bacteria.

conclusionsGenes associated with p-coumaryl alcohol biosynthesis are likely to have evolved long before the transition of photosynthetic eukaryotes to land. The original function of this lignin precursor is therefore unlikely to have been related to water transport. We suggest that it participates in the biological defense of some unicellular and multicellular algae.

Indexed as

AlcoholsAldehyde OxidoreductasesArabidopsisBiological EvolutionChlamydomonasChlorellaComputational BiologyDinoflagellidaEvolution, MolecularGene Transfer, HorizontalHaptophytaLigninLikelihood FunctionsPhotosynthesisPhylogenySelaginellaceaeAlcoholsAldehyde Oxidoreductasescinnamoyl CoA reductaseLignin

Identifiers

PMID25994183
PMCPMC4455696
OpenAlexW1511776927

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.