Abstract
In a field experiment with rice (Oryza sativa L. cv. Saket 4) grown under ambient and supplemental ultraviolet-B (UV-B) radiation at 20 % ozone depletion, differences in gas exchange, concentrations of photosynthetic pigments, anthocyanins and flavonoids, biomass accumulation, catalase and peroxidase activities, and contents of ascorbic acid and phenol were determined. Decline in photosynthesis was associated with reductions in stomatal conductance and concentrations of photosynthetic pigments. Enhanced UV-B radiation (eUV-B) increased the contents of flavonoid and phenolic compounds in leaves. Peroxidase activity increased and catalase activity was always lower at eUV-B. The total plant biomass decreased at eUV-B.
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Claims 6
Claim · model-written summary
Photosynthesis declined under enhanced UV-B and was associated with lower stomatal conductance and photosynthetic pigment concentrations.
- Taxon
- rice
Oryza sativae1 - Material
- Saket 4e1
- Outcome
- photosynthesise2
- Direction
- Declinee2
- Setting
- field experimente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“In a field experiment with rice (Oryza sativa L. cv. Saket 4) grown under ambient and supplemental ultraviolet-B (UV-B) radiation at 20 % ozone depletion”
e2“Decline in photosynthesis was associated with reductions in stomatal conductance and concentrations of photosynthetic pigments”
Claim · model-written summary
Supplemental UV-B reduced stomatal conductance and photosynthetic pigment concentrations in rice relative to ambient UV-B.
- Taxon
- riceOryza sativae1
- Material
- Saket 4e1
- Treatment
- supplemental ultraviolet-B (UV-B) radiatione1
- Outcome
- stomatal conductance and concentrations of photosynthetic pigmentse2
- Direction
- reductionse2
- Comparator
- ambiente1
- Setting
- field experimente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“In a field experiment with rice (Oryza sativa L. cv. Saket 4) grown under ambient and supplemental ultraviolet-B (UV-B) radiation at 20 % ozone depletion”
e2“Decline in photosynthesis was associated with reductions in stomatal conductance and concentrations of photosynthetic pigments”
Claim · model-written summary
Enhanced UV-B increased flavonoid and phenolic compound contents in rice leaves relative to ambient UV-B.
- Taxon
- riceOryza sativae1
- Material
- Saket 4e1
- Organ / stage
- leavese3
- Treatment
- Enhanced UV-B radiation (eUV-B)e3
- Outcome
- contents of flavonoid and phenolic compoundse3
- Direction
- increasede3
- Comparator
- ambiente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“In a field experiment with rice (Oryza sativa L. cv. Saket 4) grown under ambient and supplemental ultraviolet-B (UV-B) radiation at 20 % ozone depletion”
e3“Enhanced UV-B radiation (eUV-B) increased the contents of flavonoid and phenolic compounds in leaves”
Claim · model-written summary
Peroxidase activity increased in rice under eUV-B relative to ambient UV-B.
- Taxon
- riceOryza sativae1
- Material
- Saket 4e1
- Treatment
- eUV-Be4
- Outcome
- Peroxidase activitye4
- Direction
- increasede4
- Comparator
- ambiente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“In a field experiment with rice (Oryza sativa L. cv. Saket 4) grown under ambient and supplemental ultraviolet-B (UV-B) radiation at 20 % ozone depletion”
e4“Peroxidase activity increased and catalase activity was always lower at eUV-B”
Claim · model-written summary
Catalase activity in rice was always lower under eUV-B relative to ambient UV-B.
- Taxon
- riceOryza sativae1
- Material
- Saket 4e1
- Treatment
- eUV-Be4
- Outcome
- catalase activitye4
- Direction
- lowere4
- Qualifier
- alwayse4
- Comparator
- ambiente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“In a field experiment with rice (Oryza sativa L. cv. Saket 4) grown under ambient and supplemental ultraviolet-B (UV-B) radiation at 20 % ozone depletion”
e4“Peroxidase activity increased and catalase activity was always lower at eUV-B”
Claim · model-written summary
Total plant biomass of rice decreased under eUV-B relative to ambient UV-B.
- Taxon
- riceOryza sativae1
- Material
- Saket 4e1
- Treatment
- eUV-Be5
- Outcome
- total plant biomasse5
- Direction
- decreasede5
- Comparator
- ambiente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“In a field experiment with rice (Oryza sativa L. cv. Saket 4) grown under ambient and supplemental ultraviolet-B (UV-B) radiation at 20 % ozone depletion”
e5“The total plant biomass decreased at eUV-B”
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See all 6 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.