Evidence map›Paper›PMID 19748915›Full record

ArticlePlant physiology2009

The metabolic role of the legume endosperm: a noninvasive imaging study.

Gerd Melkus, Hardy Rolletschek, Ruslana Radchuk, Johannes Fuchs, Twan Rutten, Ulrich Wobus, Thomas Altmann, Peter Jakob, Ljudmilla Borisjuk

Open access · hybridAbstract 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 27 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
27citing papers in PubMed, 1 pooled it
6.3field-weighted citation impact, top 4% 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

27 citing papers in PubMed, 1 synthesis or guideline pooled it, 62 citations in OpenAlex.

  1. Pooled it
  2. Review
  3. Article
  4. Review
  5. Review
  6. Article
  7. Article
  8. Review
  9. Article
  10. Article
  11. Identification ofFrontiers in plant science · 2018
    Article
  12. Article
  13. Article
  14. Identification ofFrontiers in plant science · 2017
    Article
  15. Article
  16. Review
  17. Genomic dissection of the seed.Frontiers in plant science · 2014
    Review
  18. Article
  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

9 authors at 3 institutions in 1 country.

Gerd MelkusUniversity of Würzburg, Institute of Experimental Physics 5, 97074 Wuerzburg, Germany.
Hardy Rolletschek
Ruslana Radchuk
Johannes Fuchs
Twan Rutten
Ulrich Wobus
Thomas Altmann
Peter Jakob
Ljudmilla Borisjuk
University of Würzburg · DELeibniz Institute of Plant Genetics and Crop Plant Research · DELeibniz Institute for Neurobiology · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Although essential for normal seed development in the legumes, the metabolic role of the endosperm remains uncertain. We designed noninvasive nuclear magnetic resonance tools for the in vivo study of key metabolites in the transient liquid endosperm of intact pea (Pisum sativum) seeds. The steady-state levels of sucrose, glutamine, and alanine could be monitored and their distribution within the embryo sac visualized. Seed structure was digitalized as a three-dimensional model, providing volume information for distinct seed organs. The nuclear magnetic resonance method, combined with laser microdissection, isotope labeling, in situ hybridization, and electron microscopy, was used to contrast the wild-type endosperm with that of a mutant in which embryo growth is retarded. Expression of sequences encoding amino acid and sucrose transporters was up-regulated earlier in the endosperm than in the embryo, and this activity led to the accumulation of soluble metabolites in the endosperm vacuole. The endosperm provides a temporary source of nutrition, permits space for embryo growth, and acts as a buffer between the maternal organism and its offspring. The concentration of sucrose in the endosperm vacuole is developmentally controlled, while the total amount accumulated depends on the growth of the embryo. The endosperm concentration of glutamine is a limiting factor for protein storage. The properties of the endosperm ensure that the young embryo develops within a homeostatic environment, necessary to sustain embryogenesis. We argue for a degree of metabolite-mediated control exerted by the endosperm on the growth of, and assimilate storage by, the embryo.

Indexed as

AlanineGene Expression Regulation, PlantGlutamineMagnetic Resonance SpectroscopyMicrodissectionMolecular Sequence DataMutationPisum sativumRNA, MessengerRNA, PlantSeedsSucroseAlanineGlutamineRNA, MessengerRNA, PlantSucrose

Identifiers

PMID19748915
PMCPMC2773074
OpenAlexW2090879240

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.