Abstract
The application of ultraviolet light on fruit and vegetables is a promising new method to control storage diseases and to delay the onset of senescence. In this investigation, we studied the effects of hormic dose (1,4 Merg•cm -2 ) of UV-radiation on the ripening of tomato pericarp discs by measuring different characteristics of ripening and senescence during storage. We observed that UV-treatment induced significant delays of the red color development, chlorophyll degradation, and lycopene production compared to control discs. UV-treatment also retarded the decline of the chlorophyll-a fluorescence ratios F v : F m and * F : F m′ , two characteristics related, respectively, to the maximum and operational quantum yield of photosystem II electron transport. Furthermore, the climacteric ethylene peak was delayed in the treated discs. However, UV-treatment did not alter textural changes, and the respiratory climacteric peaks were observed concomitantly for both treated and untreated tomato discs. However, the respiratory rate was consistently higher in treated discs. These results indicate that UV irradiation of tomato pericarp discs delays some processes of ripening associated with chloroplast to chromoplast transition whereas other ripening processes seem unaffected.
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Claims 8
Claim · model-written summary
UV-treatment significantly delayed red colour development, chlorophyll degradation and lycopene production in tomato discs compared with controls.
- Taxon
- Tomato
Solanum lycopersicumt0 - Treatment
- UV-treatmente1
- Outcome
- red color development, chlorophyll degradation, and lycopene productione1
- Direction
- delayse1
- Comparator
- control discse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato Pericarp Disc”
e1“UV-treatment induced significant delays of the red color development, chlorophyll degradation, and lycopene production compared to control discs”
Claim · model-written summary
UV-treatment retarded the decline of chlorophyll-a fluorescence ratios in tomato discs.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- UV-treatmente2
- Outcome
- decline of the chlorophyll-a fluorescence ratiose2
- Direction
- retardede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato Pericarp Disc”
e2“UV-treatment also retarded the decline of the chlorophyll-a fluorescence ratios”
Claim · model-written summary
UV-treatment delayed the climacteric ethylene peak in tomato discs.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- UV-treatmente1
- Outcome
- climacteric ethylene peake3
- Direction
- delayede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato Pericarp Disc”
e1“UV-treatment induced significant delays of the red color development, chlorophyll degradation, and lycopene production compared to control discs”
e3“the climacteric ethylene peak was delayed in the treated discs”
Claim · model-written summary
UV-treatment did not alter textural changes in tomato discs.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- UV-treatmente4
- Outcome
- textural changese4
- Direction
- did not altere4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato Pericarp Disc”
e4“UV-treatment did not alter textural changes”
Claim · model-written summary
The respiratory rate of UV-treated tomato discs was consistently higher.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- UV-treatmente1
- Outcome
- respiratory ratee5
- Direction
- highere5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato Pericarp Disc”
e1“UV-treatment induced significant delays of the red color development, chlorophyll degradation, and lycopene production compared to control discs”
e5“the respiratory rate was consistently higher in treated discs”
Claim · model-written summary
Respiratory climacteric peaks were observed concomitantly in both treated and untreated tomato discs.
- Taxon
- TomatoSolanum lycopersicumt0
- Outcome
- respiratory climacteric peakse6
- Qualifier
- concomitantly for both treated and untreatede6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato Pericarp Disc”
e6“the respiratory climacteric peaks were observed concomitantly for both treated and untreated tomato discs”
Claim · model-written summary
UV irradiation appears to delay ripening processes associated with the chloroplast to chromoplast transition in tomato discs.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- UV irradiatione7
- Outcome
- processes of ripening associated with chloroplast to chromoplast transitione7
- Direction
- delayse7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato Pericarp Disc”
e7“UV irradiation of tomato pericarp discs delays some processes of ripening associated with chloroplast to chromoplast transition whereas other ripening processes seem unaffected”
Claim · model-written summary
Other ripening processes of UV-irradiated tomato discs seem unaffected.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- UV irradiatione7
- Outcome
- other ripening processese7
- Direction
- unaffectede7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato Pericarp Disc”
e7“UV irradiation of tomato pericarp discs delays some processes of ripening associated with chloroplast to chromoplast transition whereas other ripening processes seem unaffected”
The same questions in other papers
uv · physiology: pigments · Solanum lycopersicum (tomato)Results differ
9 papers in the same direction as this paper · 6 in the opposite direction
- no effect
- no effect
- no effect
12 papers more in this group
See all 16 papers →uv · physiology: hormones · Solanum lycopersicum (tomato)Positive and negative results
2 papers in the same direction as this paper · 2 in the opposite direction
- negative
- negative
- positive
1 paper more in this group
See all 5 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.