Abstract
Tomato (Lycopersicon esculentum Mill. cv. PKM 1) plants growing under field conditions were exposed for 15 d to solar radiation with UV-B component (280 - 320 nm) enhanced to 6.3 kJ m-2 d-1. This simulated a 15% stratospheric ozone depletion over Madurai (9° 50' N latitude). Lipid peroxidation in the leaves of UV-B treated plants was 32% higher compared to the control. Superoxide dismutase (SOD) and catalase activities registered parallel promotion by 126 and 50 %, respectively, in the UV-B treated plants. Further, the contents of total phenols and anthocyanins in the leaves have also been enhanced by 40 and 156%, respectively. On the contrary, polyphenol oxidase activity demonstrated a 58 % inhibition in the leaves of UV-B treated plants. While anthocyanins and phenols are proposed to act as antioxidants, the reduction in polyphenol oxidase activity may maintain the turnover of phenols in the UV-B treated plants.
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Claims 8
Claim · model-written summary
Supplemental UV-B increased leaf lipid peroxidation by 32% versus control.
- Taxon
- Tomato
Solanum lycopersicumt0 - Organ / stage
- leavese1
- Treatment
- UV-Bt0
- Outcome
- Lipid peroxidatione1
- Direction
- highere1
- Value
- 32%e1
- Comparator
- controle1
- Setting
- field conditionst0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato (Lycopersicon esculentum Mill. cv. PKM 1) plants growing under field conditions were exposed for 15 d to solar radiation with UV-B component (280 - 320 nm) enhanced to 6.3 kJ m-2 d-1.”
e1“Lipid peroxidation in the leaves of UV-B treated plants was 32% higher compared to the control.”
Claim · model-written summary
UV-B increased Superoxide dismutase (SOD) by 126 relative to control.
- Taxon
- TomatoSolanum lycopersicumt0
- Organ / stage
- leavese2
- Treatment
- UV-Bt0
- Outcome
- Superoxide dismutase (SOD)e1
- Direction
- promotione1
- Value
- 126e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato (Lycopersicon esculentum Mill. cv. PKM 1) plants growing under field conditions were exposed for 15 d to solar radiation with UV-B component (280 - 320 nm) enhanced to 6.3 kJ m-2 d-1.”
e1“Superoxide dismutase (SOD) and catalase activities registered parallel promotion by 126 and 50 %, respectively, in the UV-B treated plants.”
e2“Lipid peroxidation in the leaves of UV-B treated plants was 32% higher compared to the control.”
Claim · model-written summary
UV-B increased catalase activities by 50 % relative to control.
- Taxon
- TomatoSolanum lycopersicumt0
- Organ / stage
- leavese2
- Treatment
- UV-Bt0
- Outcome
- catalase activitiese1
- Direction
- promotione1
- Value
- 50 %e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato (Lycopersicon esculentum Mill. cv. PKM 1) plants growing under field conditions were exposed for 15 d to solar radiation with UV-B component (280 - 320 nm) enhanced to 6.3 kJ m-2 d-1.”
e1“Superoxide dismutase (SOD) and catalase activities registered parallel promotion by 126 and 50 %, respectively, in the UV-B treated plants.”
e2“Lipid peroxidation in the leaves of UV-B treated plants was 32% higher compared to the control.”
Claim · model-written summary
UV-B increased leaf total phenols content by 40.
- Taxon
- TomatoSolanum lycopersicumt0
- Organ / stage
- leavese1
- Treatment
- UV-Bt0
- Outcome
- total phenolse1
- Direction
- enhancede1
- Value
- 40e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato (Lycopersicon esculentum Mill. cv. PKM 1) plants growing under field conditions were exposed for 15 d to solar radiation with UV-B component (280 - 320 nm) enhanced to 6.3 kJ m-2 d-1.”
e1“Further, the contents of total phenols and anthocyanins in the leaves have also been enhanced by 40 and 156%, respectively.”
Claim · model-written summary
UV-B increased leaf anthocyanins content by 156%.
- Taxon
- TomatoSolanum lycopersicumt0
- Organ / stage
- leavese1
- Treatment
- UV-Bt0
- Outcome
- anthocyaninse1
- Direction
- enhancede1
- Value
- 156%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato (Lycopersicon esculentum Mill. cv. PKM 1) plants growing under field conditions were exposed for 15 d to solar radiation with UV-B component (280 - 320 nm) enhanced to 6.3 kJ m-2 d-1.”
e1“Further, the contents of total phenols and anthocyanins in the leaves have also been enhanced by 40 and 156%, respectively.”
Claim · model-written summary
UV-B reduced leaf polyphenol oxidase activity by 58%.
- Taxon
- TomatoSolanum lycopersicumt0
- Organ / stage
- leavese1
- Treatment
- UV-Bt0
- Gene
- polyphenol oxidasee1
- Outcome
- polyphenol oxidase activitye1
- Direction
- inhibitione1
- Value
- 58 %e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato (Lycopersicon esculentum Mill. cv. PKM 1) plants growing under field conditions were exposed for 15 d to solar radiation with UV-B component (280 - 320 nm) enhanced to 6.3 kJ m-2 d-1.”
e1“On the contrary, polyphenol oxidase activity demonstrated a 58 % inhibition in the leaves of UV-B treated plants.”
Claim · model-written summary
The authors propose that anthocyanins and phenols act as antioxidants in UV-B-treated tomato.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- UV-Be1
- Compound
- anthocyanins and phenolse1
- Outcome
- act as antioxidantse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato (Lycopersicon esculentum Mill. cv. PKM 1) plants growing under field conditions were exposed for 15 d to solar radiation with UV-B component (280 - 320 nm) enhanced to 6.3 kJ m-2 d-1.”
e1“While anthocyanins and phenols are proposed to act as antioxidants, the reduction in polyphenol oxidase activity may maintain the turnover of phenols in the UV-B treated plants.”
Claim · model-written summary
The authors suggest reduced polyphenol oxidase activity may maintain phenol turnover after UV-B treatment.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- UV-Be1
- Gene
- polyphenol oxidasee1
- Outcome
- turnover of phenolse1
- Direction
- reductione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato (Lycopersicon esculentum Mill. cv. PKM 1) plants growing under field conditions were exposed for 15 d to solar radiation with UV-B component (280 - 320 nm) enhanced to 6.3 kJ m-2 d-1.”
e1“While anthocyanins and phenols are proposed to act as antioxidants, the reduction in polyphenol oxidase activity may maintain the turnover of phenols in the UV-B treated plants.”
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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.