Abstract
Soybeans (Glycine max [L.] Merr. cv Essex) were grown in a green-house, and the first trifoliate leaf was either allowed to expand under a high photosynthetic photon flux density (PPFD) (1.4 millimoles per square meter per second) or a low PPFD (0.8 millimoles per square meter per second). After full leaf expansion, plants from each treatment were placed into a factorial design experiment with two levels of ultraviolet-B (UV-B) radiation (0 and 80 milliwatts per square meter biologically effective UV-B) and two levels of concomitant PPFD (0.8 and 1.4 millimoles per square meter per second) resulting in a total of eight treatments. Measurements of net photosynthesis and the associated diffusion conductances, ribulose-1,5-bisphosphate carboxylase activity, chlorophyll and flavonoid concentrations, and leaf anatomy were examined for all treatments. Leaves expanded in the high PPFD were unaffected by UV-B radiation while those expanded in the low PPFD were sensitive to UV-B-induced damage. Likewise, plants which were UV-B irradiated concomitantly with the high PPFD were resistant to UV-B damage, while plants irradiated under the low PPFD were sensitive. The results of this study indicate that both anatomical/morphological and physiological/biochemical factors contribute toward plant sensitivity to UV-B radiation.
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Claims 5
Claim · model-written summary
Leaves expanded under high PPFD were unaffected by UV-B radiation.
- Taxon
- Soybean
Glycine maxt0 - Organ / stage
- Leavese0
- Treatment
- high PPFDe0
- Outcome
- UV-B radiatione0
- Direction
- unaffectede0
- Comparator
- low PPFDe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaves expanded in the high PPFD were unaffected by UV-B radiation while those expanded in the low PPFD were sensitive to UV-B-induced damage.”
t0“Soybean”
Claim · model-written summary
Leaves expanded under low PPFD were sensitive to UV-B-induced damage.
- Taxon
- SoybeanGlycine maxt0
- Organ / stage
- Leavese0
- Treatment
- low PPFDe0
- Outcome
- UV-B-induced damagee0
- Comparator
- high PPFDe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaves expanded in the high PPFD were unaffected by UV-B radiation while those expanded in the low PPFD were sensitive to UV-B-induced damage.”
t0“Soybean”
Claim · model-written summary
Plants irradiated with UV-B under high PPFD resisted UV-B damage.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- UV-B irradiated concomitantly with the high PPFDe0
- Outcome
- UV-B damagee0
- Comparator
- low PPFDe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plants which were UV-B irradiated concomitantly with the high PPFD were resistant to UV-B damage, while plants irradiated under the low PPFD were sensitive.”
t0“Soybean”
Claim · model-written summary
Plants irradiated under low PPFD were sensitive to UV-B damage.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- low PPFDe0
- Outcome
- UV-B damagee0
- Comparator
- high PPFDe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plants which were UV-B irradiated concomitantly with the high PPFD were resistant to UV-B damage, while plants irradiated under the low PPFD were sensitive.”
t0“Soybean”
Claim · model-written summary
The authors attributed UV-B sensitivity to anatomical, morphological, physiological and biochemical factors.
- Taxon
- SoybeanGlycine maxt0
- Outcome
- plant sensitivity to UV-B radiatione0
- Qualifier
- anatomical/morphological and physiological/biochemical factorse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both anatomical/morphological and physiological/biochemical factors contribute toward plant sensitivity to UV-B radiation.”
t0“Soybean”
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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.