Intervention effectmodel-written summary

Barley seedling growth was significantly reduced without nitrogen.

A claim from Difficulties in location and acceptance of phloem sap combined with reduced concentration of phloem amino acids explain lowered performance of the aphid Rhopalosiphum padi on nitrogen deficient barley (Hordeum vulgare) seedlings · 2000

Intervention effectobservedoriginal resultnegativesignificant (as stated)measured

Claim · model-written summary

Barley seedling growth was significantly reduced without nitrogen.

Treatment
without nitrogene0
Outcome
Plant growthe0
Direction
reducede0

Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Hordeum vulgare
Hordeum vulgare · TaxonJackyM59 · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Plant growth was significantly reduced in seedlings grown without nitrogen.”

✓ located verbatim in the source · abstract, characters 218–293
e1

“barley seedlings ( Hordeum vulgare L.)”

✓ located verbatim in the source · abstract, characters 64–102

Title

Difficulties in location and acceptance of phloem sap combined with reduced concentration of phloem amino acids explain lowered performance of the aphid Rhopalosiphum padi on nitrogen deficient barley (Hordeum vulgare) seedlings

K.L. Ponder; J. Pritchard; R. Harrington; et al. Entomologia Experimentalis et Applicata 2000. doi:10.1046/j.1570-7458.2000.00731.x

Other claims from this paper (5)

Record rev-aadd83e2d57632a9d93ed3e98b2ca218d3a67c0f1d0f4a37c50ebcd545b41643 · schema claims-v0.9 · position 1 in the model’s answer

nitrogen · growth · Hordeum vulgare (barley)Results differ

110 papers: 66 positive, 44 negative or no effect

65 papers in the same direction as this claim · 42 in the opposite direction · 2 reporting no difference from an alternative

This claim is about lacking the nutrient, so it counts the other way round here.

  1. positive
    Nitrogen deficiency decreased barley shoot growth.

    Nitrogen deficiency in barley (Hordeum vulgare) seedlings induces molecular and metabolic adjustments that trigger aphid resistance · 2015

    Same directionCites this paperAbout lacking this nutrient, so it counts the other way round

  2. no effect
    Topsoil nitrogen supply showed no clear effect on root intensity, depth, or density.

    Intercropping effect on root growth and nitrogen uptake at different nitrogen levels · 2014

    Opposite direction

  3. no effect
    Lower nitrogen supply had no effect on final leaves initiated in the barley apex.

    The influence of fertiliser nitrogen application on development and number of reproductive primordia in field-grown two- and six-rowed barleys · 2004

    Opposite direction

  4. negative
    Low nitrogen reduced mean shoot dry weight by 50%.

    Genome-Wide Association Study and Identification of Candidate Genes for Nitrogen Use Efficiency in Barley (Hordeum vulgare L.) · 2020

    Opposite direction

  5. no effect
    Two days of nitrate starvation did not significantly affect dry matter increment.

    Nitrate utilization in barley: relations to nitrate supply and light/dark cycles · 1988

    Opposite direction

  6. negative
    Delay in nitrate application reduced dry weight of the first leaf of barley.

    Growth and Photosynthesis in the First Leaf of Barley The Effect of Time of Application of Nitrogen · 1972

    Opposite direction

  7. no effect
    Nitrogen application did not affect dry weight per main stem.

    Response of winter barley cultivars to nitrogen and a plant growth regulator in relation to lodging · 1991

    Opposite direction

  8. no effect
    Broadcast urea with 10% biuret did not damage barley germination.

    The Germination of Small Grain and Corn as Influenced by Urea and Other Nitrogenous Fertilizers · 1960

    Opposite direction

101 papers more in this group

See all 110 papers →

Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.