Claim · model-written summary
UV-B damage was not visually evident 2 hours after irradiation, but it was detected by PAM and LIF fluorescence with equivalent success.
- Taxon
- Malus domestica
Malus domesticae0 - Outcome
- UV-B damagee2
- Qualifier
- with equivalent successe2
- Comparator
- PAM and LIF fluorescence techniquese2
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentSettingDirectionValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“greenhouse experiments with apple seedlings (Malus domestica Borkh.)”
e2“Although UV-B damage was not visually evident 2 hours after irradiation, it could be detected by PAM and LIF fluorescence techniques with equivalent success”
Title
Kuckenberg, J.; Tartachnyk, I.; Schmitz-Eiberger, M.; et al. Federal Research Centre for Cultivated Plants (Julius Kühn-Institut) 2012. doi:10.5073/jabfq.2007.081.014
Other claims from this paper (19)
- Intervention effect UV-B doses of 10-26 W m-2 for 180 minutes did not change chlorophyll content or leaf reflection in apple leaves.
- Intervention effect The intensity of LIF fluorescence was reduced by 19-30% after UV-B irradiation of apple leaves.
- Intervention effect After UV-B treatment the F686/F740 values of apple leaves were significantly lower in all UV-B treatments, with a stronger decrease in F686 than in F740 fluorescence.
- Intervention effect Maximum fluorescence (Fm) of apple leaves was significantly reduced 2 hours after UV-B treatment.
- Intervention effect Ground fluorescence (Fo) of apple leaves slightly increased 2 hours after UV-B treatment.
- Association Fv is negatively related to UV-B dose in apple leaves, with a determination coefficient (R2) of 0.50.
- Association Fv/Fm is negatively related to UV-B dose in apple leaves, with a determination coefficient (R2) of 0.48.
- Association Fv/Fo is negatively related to UV-B dose in apple leaves, with a determination coefficient (R2) of 0.58.
- Method / resource The Fv/Fo ratio was the most sensitive of the PAM and LIF parameters for detecting UV-B induced damage in apple leaves.
- Association PAM fluorescence images showed an enhanced spatial heterogeneity of photosynthetic activity in apple leaves with increasing UV-B dose.
- Observation After UV-B exposure, photosynthetic functionality of apple leaves showed a continuous recovery process, indicated by restoring Fo and Fm.
- Intervention effect After 240 minutes at 20 W m-2, Fv/Fm of apple leaves declined from 0.80 to 0.72.
- Intervention effect After 360 minutes at 20 W m-2, Fv/Fm of apple leaves declined to 0.43.
- Observation Fv/Fm of apple leaves recovered at 7 x 10-4 units per hour during the first 48 hours after UV-B treatment.
- Observation Fv/Fm of apple leaves recovered at 5 x 10-3 units per hour during the first 48 hours after UV-B treatment.
- Method / resource The recovery curves of Fm, Fv, Fv/Fm and Fv/Fo of apple leaves were well fitted by an exponential rise to maximum function.
- Intervention effect Within 7 days after UV-B light exposure, apple leaves had 14% or 4% lower Fm than control plants.
- Intervention effect Within 7 days after UV-B light exposure, apple leaves had 5% or 1% lower Fv/Fm values than control plants.
- Observation Apple leaves showed only a partial recovery from photoinhibition and irreversible damage in PSII within 7 days after UV-B exposure.