Claim · model-written summary
The authors suggest that changes in nitrogen status due to fertilisers or pollution may lead to changes in UV-B sensitivity.
- Taxon
- cucumber
Cucumis sativust0 - Treatment
- changes in N status due to fertilisers or pollutione1
- Outcome
- UV-B sensitivitye1
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingDirectionValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“changes in N status due to fertilisers or pollution may lead to changes in UV-B sensitivity”
t0“cucumber”
Title
Nitrogen status affects UV-B sensitivity of cucumber
J.E. Hunt; D.L. McNeil Australian Journal of Plant Physiology 1998. doi:10.1071/pp97102
Other claims from this paper (12)
- Intervention effect Plant biomass and height of cucumber increased with increasing amounts of applied nitrogen.
- Intervention effect Leaf nitrogen, chlorophyll and leaf carbon content of cucumber increased with increasing amounts of applied nitrogen.
- Intervention effect At the highest nitrogen level, supplemental UV-B decreased cucumber leaf area by 20% relative to ambient UV-B.
- Intervention effect At the highest nitrogen level, supplemental UV-B decreased cucumber height by 28% relative to ambient UV-B.
- Intervention effect At the highest nitrogen level, supplemental UV-B decreased cucumber total biomass by 20% relative to ambient UV-B.
- Observation Supplemental UV-B had no such growth-reducing effect on cucumber when nitrogen stress was imposed.
- Intervention effect Apparent quantum yield, dark respiration and photosynthetic rate of cucumber were unaffected by supplemental UV-B.
- Observation Photodestruction of reaction centres was not evident in cucumber under supplemental UV-B.
- Intervention effect There was a significant increase in photoinhibition at midday in nitrogen-replete cucumber plants.
- Intervention effect In cucumber leaves with N content below 3%, supplemental UV-B significantly increased the concentration of UV-B absorbing compounds, by 72% at the lowest level of applied N.
- Intervention effect The epidermis of cucumber was thicker at all nitrogen levels under supplemental UV-B.
- Mechanism The authors suggest that the stress response to low nitrogen may confer secondary protection against UV-B damage.