Abstract
Mature green and pink tomato ( Lycopersicon esculentum Mill.) fruit were subjected to ionizing irradiation in the range of 0.7 to 2.2 kGy from gamma-or X-ray sources. Firmness of whole fruit and pericarp tissue, pericarp electrolyte leakage, and pericarp cell wall hydrolase activities were measured following irradiation and during postirradiation ripening at 20 °C. Irradiation-induced softening was evident in mature-green and pink fruit within hours following irradiation, and differences between irradiated and control fruit persisted throughout postirradiation storage. Trends of firmness loss were much more consistent and showed much greater dose dependency in pericarp tissue than whole fruit. Irradiation enhanced electrolyte efflux in fruit of both maturity classes. Fruit irradiated at the mature-green stage softened during postirradiation storage but exhibited an apparently irreversible suppression in polygalacturonase activity, with levels remaining <10% of those of nonirradiated fruit. Polygalacturonase activity was less strongly affected in irradiated pink fruit than in mature-green fruit, but activity remained reduced relative to the controls. Pectinmethylesterase and β-galactosidase activities were significantly enhanced in irradiated fruit of both ripening stages in the early period following irradiation, but reductions were noted after prolonged storage.
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Claims 9
Claim · model-written summary
Irradiation softened mature-green fruit within hours and the difference persisted through storage.
- Taxon
- tomato
Solanum lycopersicumt0 - Organ / stage
- mature-greene0
- Treatment
- Irradiatione0
- Outcome
- softeninge0
- Direction
- softeninge0
- Qualifier
- within hours following irradiatione0
- Comparator
- control fruite0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Irradiation-induced softening was evident in mature-green and pink fruit within hours following irradiation, and differences between irradiated and control fruit persisted throughout postirradiation storage.”
t0“Tomato”
Claim · model-written summary
Irradiation softened pink fruit within hours and the difference persisted through storage.
- Taxon
- tomatoSolanum lycopersicumt0
- Organ / stage
- pink fruite0
- Treatment
- Irradiatione0
- Outcome
- softeninge0
- Direction
- softeninge0
- Qualifier
- throughout postirradiation storagee0
- Comparator
- control fruite0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Irradiation-induced softening was evident in mature-green and pink fruit within hours following irradiation, and differences between irradiated and control fruit persisted throughout postirradiation storage.”
t0“Tomato”
Claim · model-written summary
Firmness loss was more consistent and dose dependent in pericarp than whole fruit.
- Taxon
- tomatoSolanum lycopersicumt0
- Organ / stage
- pericarp tissuee0
- Outcome
- firmness losse0
- Direction
- much greatere0
- Comparator
- whole fruite0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Trends of firmness loss were much more consistent and showed much greater dose dependency in pericarp tissue than whole fruit.”
t0“Tomato”
Claim · model-written summary
Irradiation increased electrolyte efflux in both maturity classes.
- Taxon
- tomatoSolanum lycopersicumt0
- Organ / stage
- fruit of both maturity classese0
- Treatment
- Irradiatione0
- Outcome
- electrolyte effluxe0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Irradiation enhanced electrolyte efflux in fruit of both maturity classes.”
t0“Tomato”
Claim · model-written summary
Mature-green irradiated fruit softened during storage.
- Taxon
- tomatoSolanum lycopersicumt0
- Organ / stage
- mature-green stagee0
- Treatment
- irradiatede0
- Outcome
- softenede0
- Direction
- softenede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fruit irradiated at the mature-green stage softened during postirradiation storage”
t0“Tomato”
Claim · model-written summary
Mature-green irradiation suppressed polygalacturonase activity to under 10% of nonirradiated fruit.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- irradiatede0
- Gene
- polygalacturonasee0
- Outcome
- polygalacturonase activitye0
- Direction
- suppressione0
- Value
- <10%e0
- Qualifier
- apparently irreversiblee0
- Comparator
- nonirradiated fruite0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exhibited an apparently irreversible suppression in polygalacturonase activity, with levels remaining <10% of those of nonirradiated fruit.”
t0“Tomato”
Claim · model-written summary
Irradiation reduced polygalacturonase activity in pink fruit, less strongly than in mature-green fruit.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- irradiated pink fruite0
- Gene
- Polygalacturonasee0
- Outcome
- Polygalacturonase activitye0
- Direction
- reducede0
- Qualifier
- less strongly affectede0
- Comparator
- the controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Polygalacturonase activity was less strongly affected in irradiated pink fruit than in mature-green fruit, but activity remained reduced relative to the controls.”
t0“Tomato”
Claim · model-written summary
Irradiation significantly enhanced pectinmethylesterase and β-galactosidase activities early after treatment.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- irradiatede0
- Outcome
- Pectinmethylesterase and β-galactosidase activitiese0
- Direction
- enhancede0
- Qualifier
- early period following irradiatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pectinmethylesterase and β-galactosidase activities were significantly enhanced in irradiated fruit of both ripening stages in the early period following irradiation”
t0“Tomato”
Claim · model-written summary
Pectinmethylesterase and β-galactosidase activities declined after prolonged storage.
- Taxon
- tomatoSolanum lycopersicumt0
- Outcome
- Pectinmethylesterase and β-galactosidase activitiese0
- Direction
- reductionse0
- Qualifier
- after prolonged storagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pectinmethylesterase and β-galactosidase activities were significantly enhanced in irradiated fruit of both ripening stages in the early period following irradiation, but reductions were noted after prolonged storage.”
t0“Tomato”
The same questions in other papers
radiation · physiology: enzyme activity · Solanum lycopersicum (tomato)Positive and negative results
1 in the opposite direction
- positive
radiation · quality: postharvest · Solanum lycopersicum (tomato)Positive and negative results
2 papers in the same direction as this paper · 13 in the opposite direction
- no effect
- positive
- positive
12 papers more in this group
See all 16 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.