Evidence map›Paper›PMID 21742814›Full record

ArticlePlant physiology2011

The ROOT DETERMINED NODULATION1 gene regulates nodule number in roots of Medicago truncatula and defines a highly conserved, uncharacterized plant gene family.

Elise L Schnabel, Tessema K Kassaw, Lucinda S Smith, John F Marsh, Giles E Oldroyd, Sharon R Long, Julia A Frugoli

Open access · hybridAbstract read
In one paragraph

Article in Plant physiology, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 45 papers.

0numbers the graph read from it
0cells of the map it votes in
45citing papers in PubMed
11.5field-weighted citation impact, top 2% 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

45 citing papers in PubMed, 107 citations in OpenAlex.

  1. Article
  2. Review
  3. Plants (Basel, Switzerland) · 2025
    Article
  4. Article
  5. Article
  6. Review
  7. Article
  8. Frontiers in plant science · 2024
    Article
  9. Review
  10. ACurrent issues in molecular biology · 2023
    Article
  11. Article
  12. Photosynthetic Gains in Super-Nodulating Mutants ofPlants (Basel, Switzerland) · 2023
    Article
  13. Mutation ofFrontiers in plant science · 2023
    Article
  14. Review
  15. Article
  16. Review
  17. Plant ProteinFrontiers in plant science · 2021
    Review
  18. 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

7 authors at 3 institutions in 2 countries.

Elise L SchnabelDepartment of Genetics and Biochemistry, Clemson University, Clemson, South Carolina 29634, USA.
Tessema K Kassaw
Lucinda S Smith
John F Marsh
Giles E Oldroyd
Sharon R Long
Julia A Frugoli
Stanford University · USClemson University · USJohn Innes Centre · GB

Funding

Biotechnology and Biological Sciences Research Council BBS/E/J/00000603Howard Hughes Medical Institute
6 · The paper itself

Abstract

The formation of nitrogen-fixing nodules in legumes is tightly controlled by a long-distance signaling system in which nodulating roots signal to shoot tissues to suppress further nodulation. A screen for supernodulating Medicago truncatula mutants defective in this regulatory behavior yielded loss-of-function alleles of a gene designated ROOT DETERMINED NODULATION1 (RDN1). Grafting experiments demonstrated that RDN1 regulatory function occurs in the roots, not the shoots, and is essential for normal nodule number regulation. The RDN1 gene, Medtr5g089520, was identified by genetic mapping, transcript profiling, and phenotypic rescue by expression of the wild-type gene in rdn1 mutants. A mutation in a putative RDN1 ortholog was also identified in the supernodulating nod3 mutant of pea (Pisum sativum). RDN1 is predicted to encode a 357-amino acid protein of unknown function. The RDN1 promoter drives expression in the vascular cylinder, suggesting RDN1 may be involved in initiating, responding to, or transporting vascular signals. RDN1 is a member of a small, uncharacterized, highly conserved gene family unique to green plants, including algae, that we have named the RDN family.

Indexed as

Gene Expression Regulation, PlantGenes, PlantAmino Acid SequenceMedicago truncatulaMolecular Sequence DataNitrogen FixationPlant ProteinsPlant RootsPlant Proteins

Identifiers

PMID21742814
PMCPMC3165882
OpenAlexW2000058281

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.