Abstract
The effects of a hormic dose (3.7 kJ m−2) of UV-C (254 nm) on changes in fruit membrane lipids perox-idation markers during storage were determined using tomato ( Lycopersicon esculentum L. cv. Trust) fruit. There were two distinct response phases following the treatment. A significant induction of lipid peroxidation markers (lipofuscin-like compounds, malondialdehyde, aldehydes, pentane, ethane, hydrogen peroxide, and efflux of elec-trolytes including potassium and calcium) occurred within the first 5 days. This induction suggests that the cell mem-brane was the primary target of UV-C irradiation. After this period, the level of all of these peroxidation markers become lower in UV-C-treated fruit than in control fruit, suggesting the induction of a defense or repair mechanism, probably involving production of antioxidants and activation of antioxidative enzyme. Within the second phase, any changes in lipid peroxidation activity reflected the fruit ripening / senescence process rather than the UV-C effect.
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Claims 5
Claim · model-written summary
UV-C induced tomato fruit lipid peroxidation markers during the first five days.
- Taxon
- tomato
Solanum lycopersicume2 - Material
- Truste2
- Treatment
- 3.7 kJ m−2) of UV-C (254 nme1
- Outcome
- lipid peroxidation markerse0
- Direction
- inductione0
- Qualifier
- first 5 dayse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A significant induction of lipid peroxidation markers (lipofuscin-like compounds, malondialdehyde, aldehydes, pentane, ethane, hydrogen peroxide, and efflux of elec-trolytes including potassium and calcium) occurred within the first 5 days.”
e1“a hormic dose (3.7 kJ m−2) of UV-C (254 nm)”
e2“tomato ( Lycopersicon esculentum L. cv. Trust) fruit”
Claim · model-written summary
After five days, UV-C-treated tomato fruit had lower peroxidation markers than controls.
- Taxon
- tomatoSolanum lycopersicume1
- Material
- Truste1
- Treatment
- UV-C-treatede0
- Outcome
- peroxidation markerse0
- Direction
- lowere0
- Comparator
- control fruite0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After this period, the level of all of these peroxidation markers become lower in UV-C-treated fruit than in control fruit”
e1“tomato ( Lycopersicon esculentum L. cv. Trust) fruit”
Claim · model-written summary
The early marker induction suggests tomato fruit membranes were the primary UV-C target.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- UV-C irradiatione0
- Outcome
- cell mem-brane was the primary targete0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This induction suggests that the cell mem-brane was the primary target of UV-C irradiation.”
e1“tomato ( Lycopersicon esculentum L. cv. Trust) fruit”
Claim · model-written summary
The later fall in tomato peroxidation markers suggests antioxidant production or enzyme activation as repair.
- Taxon
- tomatoSolanum lycopersicume1
- Outcome
- defense or repair mechanisme0
- Qualifier
- probably involving production of antioxidants and activation of antioxidative enzymee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“suggesting the induction of a defense or repair mechanism, probably involving production of antioxidants and activation of antioxidative enzyme.”
e1“tomato ( Lycopersicon esculentum L. cv. Trust) fruit”
Claim · model-written summary
In the second phase, peroxidation changes reflected tomato ripening or senescence.
- Taxon
- tomatoSolanum lycopersicume1
- Organ / stage
- fruite1
- Outcome
- changes in lipid peroxidation activitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Within the second phase, any changes in lipid peroxidation activity reflected the fruit ripening / senescence process rather than the UV-C effect.”
e1“tomato ( Lycopersicon esculentum L. cv. Trust) fruit”
The same questions in other papers
uv · physiology: oxidative · Solanum lycopersicum (tomato)Positive and negative results
3 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- negative
2 papers more in this group
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.