Evidence map›Paper›PMID 19433479›Full record

ArticleJournal of experimental botany2009

Pollen grain development is compromised in Arabidopsis agp6 agp11 null mutants.

Sílvia Coimbra, Mário Costa, Brian Jones, Marta Adelina Mendes, Luís Gustavo Pereira

Open access · bronzeAbstract read
In one paragraph

Article in Journal of experimental botany, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 83 papers.

0numbers the graph read from it
0cells of the map it votes in
83citing papers in PubMed
2.6field-weighted citation impact, top 10% 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

83 citing papers in PubMed, 157 citations in OpenAlex.

  1. Review
  2. Article
  3. A FnWRKY17-Frontiers in plant science · 2026
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  7. Article
  8. Review
  9. Article
  10. Article
  11. Plants (Basel, Switzerland) · 2024
    Article
  12. Article
  13. Knockout of eightCell surface (Amsterdam, Netherlands) · 2023
    Article
  14. Review
  15. Article
  16. Article
  17. Article
  18. Review
  19. OsFLA1 encodes a fasciclin-like arabinogalactan protein and affects pollen exine development in rice.TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2022
    Article
  20. Article

23 more citing papers are in PubMed but not listed here.

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

5 authors at 2 institutions in 2 countries.

Sílvia CoimbraDepartamento de Botânica, Faculdade de Ciências, Universidade do Porto, Edifício FC4 Rua do Campo Alegre 4169-007 Porto, Portugal. scoimbra@fc.up.pt
Mário Costa
Brian Jones
Marta Adelina Mendes
Luís Gustavo Pereira
Universidade do Porto · PTUniversity of Melbourne · AU

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Arabinogalactan proteins (AGPs) are structurally complex plasma membrane and cell wall proteoglycans that are implicated in diverse developmental processes, including plant sexual reproduction. Male gametogenesis (pollen grain development) is fundamental to plant sexual reproduction. The role of two abundant, pollen-specific AGPs, AGP6, and AGP11, have been investigated here. The pollen specificity of these proteoglycans suggested that they are integral to pollen biogenesis and their strong sequence homology indicated a potential for overlapping function. Indeed, single gene transposon insertion knockouts for both AGPs showed no discernible phenotype. However, in plants homozygous for one of the insertions and heterozygous for the other, in homozygous double mutants, and in RNAi and amiRNA transgenic plants that were down-regulated for both genes, many pollen grains failed to develop normally, leading to their collapse. The microscopic observations of these aborted pollen grains showed a condensed cytoplasm, membrane blebbing and the presence of small lytic vacuoles. Later in development, the generative cells that arise from mitotic divisions were not seen to go into the second mitosis. Anther wall development, the establishment of the endothecium thickenings, the opening of the stomium, and the deposition of the pollen coat were all normal in the knockout and knockdown lines. Our data provide strong evidence that these two proteoglycans have overlapping and important functions in gametophytic pollen grain development.

Indexed as

Gene SilencingArabidopsisArabidopsis ProteinsMutagenesis, InsertionalPollenProteoglycansAGP11 protein, ArabidopsisAGP6 protein, ArabidopsisArabidopsis ProteinsProteoglycans

Identifiers

PMID19433479
PMCPMC2718217
OpenAlexW2127626379

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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.