Evidence map›Paper›PMID 28755320›Full record

ArticlePlant molecular biology2017

Evaluation of the mature grain phytase candidate HvPAPhy_a gene in barley (Hordeum vulgare L.) using CRISPR/Cas9 and TALENs.

Inger B Holme, Toni Wendt, Javier Gil-Humanes, Lise C Deleuran, Colby G Starker, Daniel F Voytas, Henrik Brinch-Pedersen

Abstract read
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In one paragraph

Article in Plant molecular biology, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 32 papers.

0numbers the graph read from it
0cells of the map it votes in
32citing papers in PubMed
–field-weighted citation impact
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

32 citing papers in PubMed.

  1. Novel CRISPR/Cas9-DerivedInternational journal of molecular sciences · 2026
    Article
  2. Review
  3. Transcription factor-promoter interactions forbioRxiv : the preprint server for biology · 2025
    Article
  4. Article
  5. Transgenic barley over-expressingGM crops & food · 2025
    Article
  6. Review
  7. Article
  8. Article
  9. Article
  10. Review
  11. Review
  12. Article
  13. Article
  14. Review
  15. Increasing Fruit Weight by Editing aFrontiers in plant science · 2022
    Article
  16. Review
  17. Barley Nepenthesin-Like Aspartic ProteaseFrontiers in plant science · 2021
    Article
  18. Globoids and Phytase: The Mineral Storage and Release System in Seeds.International journal of molecular sciences · 2020
    Review
  19. Article
  20. Review
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.

Inger B HolmeDepartment of Molecular Biology and Genetics, Research Centre Flakkebjerg, Aarhus University, Slagelse, Denmark. inger.holme@mbg.au.dk.ORCID http://orcid.org/0000-0001-5008-0086
Toni WendtDepartment of Molecular Biology and Genetics, Research Centre Flakkebjerg, Aarhus University, Slagelse, Denmark.
Javier Gil-HumanesDepartment of Genetics, Cell Biology and Development and Center for Genome Engineering, University of Minnesota, Minneapolis, MN, USA.
Lise C DeleuranDepartment of Agroecology, Research Centre Flakkebjerg, Aarhus University, Slagelse, Denmark.
Colby G StarkerDepartment of Genetics, Cell Biology and Development and Center for Genome Engineering, University of Minnesota, Minneapolis, MN, USA.
Daniel F VoytasDepartment of Genetics, Cell Biology and Development and Center for Genome Engineering, University of Minnesota, Minneapolis, MN, USA.
Henrik Brinch-PedersenDepartment of Molecular Biology and Genetics, Research Centre Flakkebjerg, Aarhus University, Slagelse, Denmark.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

In the present study, we utilized TALEN- and CRISPR/Cas9-induced mutations to analyze the promoter of the barley phytase gene HvPAPhy_a. The purpose of the study was dual, validation of the PAPhy_a enzyme as the main contributor of the mature grain phytase activity (MGPA), as well as validating the importance of a specific promoter region of the PAPhy_a gene which contains three overlapping cis-acting regulatory elements (GCN4, Skn1 and the RY-element) known to be involved in gene expression during grain filling. The results confirm that the barley PAPhy_a enzyme is the main contributor to the MGPA as grains of knock-out lines show very low MGPA. Additionally, the analysis of the HvPAPhy_a promoter region containing the GCN4/Skn1/RY motif highlights its importance for HvPAPhy_a expression as the MGPA in grains of plant lines with mutations within this motif is significantly reduced. Interestingly, lines with deletions located downstream of the motif show even lower MGPA levels, indicating that the GCN4/SKn1/RY motif is not the only element responsible for the level of PAPhy_a expression during grain maturation. Mutant grains with very low MPGA showed delayed germination as compared to grains of wild type barley. As grains with high levels of preformed phytases would provide more readily available phosphorous needed for a fast germination, this indicates that faster germination may be implicated in the positive selection of the ancient PAPhy gene duplication that lead to the creation of the PAPhy_a gene.

Indexed as

6-PhytaseBase SequenceCRISPR-Cas SystemsDNA, BacterialGenetic VectorsGerminationHomozygoteHordeumMutationOxygen ConsumptionSeedsSequence AlignmentTranscription Activator-Like Effector Nucleases6-PhytaseDNA, BacterialT-DNATranscription Activator-Like Effector NucleasesBarleyCRISPR/Cas9GCN4/Skn1/RY motifHvPAPhy_aMature grain phytase activityTALENs

Identifiers

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Registered trials

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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.