Evidence map›Paper›PMID 18971431›Full record

ArticlePlant physiology2009

Suppression of 4-coumarate-CoA ligase in the coniferous gymnosperm Pinus radiata.

Armin Wagner, Lloyd Donaldson, Hoon Kim, Lorelle Phillips, Heather Flint, Diane Steward, Kirk Torr, Gerald Koch, Uwe Schmitt, John Ralph

Open access · bronzeAbstract read
In one paragraph

Article in Plant physiology, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 59 papers.

0numbers the graph read from it
0cells of the map it votes in
59citing papers in PubMed
3.9field-weighted citation impact, top 6% 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

59 citing papers in PubMed, 183 citations in OpenAlex.

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  13. Autofluorescence in Plants.Molecules (Basel, Switzerland) · 2020
    Review
  14. Article
  15. Lignin Engineering in Forest Trees.Frontiers in plant science · 2019
    Review
  16. Review
  17. Article
  18. Lignins: Biosynthesis and Biological Functions in Plants.International journal of molecular sciences · 2018
    Review
  19. Article
  20. 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

10 authors at 3 institutions in 2 countries.

Armin WagnerScion, Rotorua 3010, New Zealand. armin.wagner@scionresearch.com
Lloyd Donaldson
Hoon Kim
Lorelle Phillips
Heather Flint
Diane Steward
Kirk Torr
Gerald Koch
Uwe Schmitt
John Ralph
Scion · NZForest Products Laboratory · USGreat Lakes Bioenergy Research Center · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Severe suppression of 4-coumarate-coenzyme A ligase (4CL) in the coniferous gymnosperm Pinus radiata substantially affected plant phenotype and resulted in dwarfed plants with a "bonsai tree-like" appearance. Microscopic analyses of stem sections from 2-year-old plants revealed substantial morphological changes in both wood and bark tissues. This included the formation of weakly lignified tracheids that displayed signs of collapse and the development of circumferential bands of axial parenchyma. Acetyl bromide-soluble lignin assays and proton nuclear magnetic resonance studies revealed lignin reductions of 36% to 50% in the most severely affected transgenic plants. Two-dimensional nuclear magnetic resonance and pyrolysis-gas chromatography-mass spectrometry studies indicated that lignin reductions were mainly due to depletion of guaiacyl but not p-hydroxyphenyl lignin. 4CL silencing also caused modifications in the lignin interunit linkage distribution, including elevated beta-aryl ether (beta-O-4 unit) and spirodienone (beta-1) levels, accompanied by lower phenylcoumaran (beta-5), resinol (beta-beta), and dibenzodioxocin (5-5/beta-O-4) levels. A sharp depletion in the level of saturated (dihydroconiferyl alcohol) end groups was also observed. Severe suppression of 4CL also affected carbohydrate metabolism. Most obvious was an up to approximately 2-fold increase in galactose content in wood from transgenic plants due to increased compression wood formation. The molecular, anatomical, and analytical data verified that the isolated 4CL clone is associated with lignin biosynthesis and illustrated that 4CL silencing leads to complex, often surprising, physiological and morphological changes in P. radiata.

Indexed as

Gene SilencingCarbohydrate MetabolismCoenzyme A LigasesGene Expression Regulation, PlantGenes, PlantLigninMolecular Sequence DataPinusPlant ProteinsPlants, Genetically ModifiedPlant StemsWood4-coumarate-CoA ligaseCoenzyme A LigasesLigninPlant Proteins

Identifiers

PMID18971431
PMCPMC2613735
OpenAlexW2095625126

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.