Intervention effectmodel-written summary

Lettuce fresh weight at harvest was independent of prior UV-B treatment.

A claim from UV-B transmittance of greenhouse covering materials affects growth and flavonoid content of lettuce seedlings · 2010

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Lettuce fresh weight at harvest was independent of prior UV-B treatment.

Taxon
lettuceLactuca sativat0
Organ / stage
time of harveste0
Treatment
previous ultraviolet-B treatmente0
Outcome
plant fresh weighte0

Not reportedMaterialGeneCompoundInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingDirectionValueQualifier

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

Lactuca sativa
Lactuca sativa · Taxonen:User:Geographer · CC BY 1.0 · Wikimedia Commons ↗

Verbatim

e0

“At the time of harvest plant fresh weight was therefore independent from previous ultraviolet-B treatment”

✓ located verbatim in the source · abstract, characters 1158–1263
t0

“lettuce seedlings”

✓ located verbatim in the source · title, characters 92–109

Title

UV-B transmittance of greenhouse covering materials affects growth and flavonoid content of lettuce seedlings

H. Behn; S. Tittmann; A. Walter; et al. European Journal of Horticultural Science 2010. doi:10.1079/ejhs.2010/2005801

Other claims from this paper (4)

Record rev-072d77e39dd0f09eba444e8a50e951258d30ed61623b17bbefbb671863b56fdf · schema claims-v0.9 · position 5 in the model’s answer

uv · growth · Lactuca sativa (garden lettuce)Results differ

35 papers: 15 positive, 20 negative or no effect

19 papers in the same direction as this claim · 15 in the opposite direction

  1. positive
    Excluding solar UV-B increased fresh weight of tops by 63% compared with ambient UV-B.

    Inhibitory effects of ambient levels of solar UV‐A and UV‐B radiation on growth of cv. New Red Fire lettuce · 1998 · compared with ambient UV‐B (tefzel or teflon)

    Opposite directionCited by this paper

  2. no effect
    UV-A treatment did not change growth parameters or antioxidant compounds of romaine lettuce relative to control in two cultivars.

    Changes in Growth and Antioxidant Contents of Romaine Lettuce by Different UV Spectra · 2018 · compared with control

    Same directionCites this paper

  3. positive
    UVA-10 increased shoot dry weight by 27% versus no UVA.

    UVA Radiation Is Beneficial for Yield and Quality of Indoor Cultivated Lettuce · 2019 · compared with control (no UVA)

    Opposite direction

  4. positive
    Relative growth of lettuce plants pre-acclimatized to UV-B was increased.

    Increased exposure to UV‐B radiation during early development leads to enhanced photoprotection and improved long‐term performance in Lactuca sativa · 2011

    Opposite direction

  5. positive
    Lettuce plants grown under zero UV-B had significantly higher shoot fresh weight than under the UV-inclusive filter.

    Ecological responses to UV radiation: interactions between the biological effects of UV on plants and on associated organisms · 2011 · compared with UV-inclusive filter

    Opposite direction

  6. positive
    UV treatments increased lettuce leaf thickness.

    UV SUPPLEMENTATION FOR GROWTH REGULATION AND DISEASE CONTROL · 2006

    Opposite direction

  7. positive
    UV irradiation of the water reservoir reduced algal and biofilm growth.

    Enhancing plant productivity while suppressing biofilm growth in a windowfarm system using beneficial bacteria and ultraviolet irradiation · 2015

    Opposite direction

  8. positive
    UV-C decontamination of hydroponic circulation water accelerated lettuce growth.

    Enhanced vegetable production in hydroponic systems using decontamination of closed circulating fluid · 2024 · compared with control groups without such a system

    Opposite direction

26 papers more in this group

See all 35 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.