Abstract
Low hormetic doses of ultraviolet light (UV-C) stress on exposed peaches ( Prunus persica ). reduced brown rot resulting from field and artificial inoculation from Monilinia fructicola . To test the hypothesis that UV-C induced resistance through host responses the following tests involving biochemical changes (phenlyalanine ammonia-lyase activity (PAL) and ethylene production (EP)), bioassay of antifungal activity of tissue extracts to the fungus, and latent infection of rot free peaches previously treated with and without UV-C were determined. Exposure of peaches to UV-C dose of 7.5×10 4 ergs/mm 2 promoted an increase in PAL and EP compared to the control. As the PAL activity increased, percent storage rots decreased. Antifungal activity to the fungal conidia in UV-C treated peach extract showed that the percent conidia germination was reduced 3 folds. Preharvest infection of brown rot which indicated latent infection was significantly reduced. To test for the germicidal effect of UV-C on M. fructicola on the surface of peaches, an artificial epiphytic population of the fungus was deposited on the peaches. A negative relationship between UV-C dose of 1.3 to 40×10 4 ergs /mm 2 , colony forming units and number of decaying brown rot lesions were found.
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Claims 8
Claim · model-written summary
Low UV-C doses reduced peach brown rot after field and artificial inoculation.
- Taxon
- Prunus persica
Prunus persicae0 - Treatment
- Low hormetic doses of ultraviolet light (UV-C)e0
- Interactor
- Monilinia fructicola
Monilinia fructicolae0pathogen - Outcome
- brown rote0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Low hormetic doses of ultraviolet light (UV-C) stress on exposed peaches ( Prunus persica ). reduced brown rot resulting from field and artificial inoculation from Monilinia fructicola .”
Claim · model-written summary
UV-C increased PAL activity compared with control.
- Taxon
- Prunus persicaPrunus persicae0
- Treatment
- UV-C dose of 7.5×10 4 ergs/mm 2e1
- Outcome
- PALe1
- Direction
- increasee1
- Comparator
- the controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Prunus persica”
e1“Exposure of peaches to UV-C dose of 7.5×10 4 ergs/mm 2 promoted an increase in PAL and EP compared to the control”
Claim · model-written summary
UV-C increased ethylene production compared with control.
- Taxon
- Prunus persicaPrunus persicae0
- Treatment
- UV-C dose of 7.5×10 4 ergs/mm 2e1
- Outcome
- ethylene production (EP)e2
- Direction
- increasee1
- Comparator
- the controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Prunus persica”
e1“Exposure of peaches to UV-C dose of 7.5×10 4 ergs/mm 2 promoted an increase in PAL and EP compared to the control”
e2“ethylene production (EP)”
Claim · model-written summary
Storage rot percentage fell as PAL activity increased.
- Taxon
- Prunus persicaPrunus persicae0
- Gene
- PALe1
- Outcome
- percent storage rotse1
- Direction
- decreasede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Prunus persica”
e1“As the PAL activity increased, percent storage rots decreased”
Claim · model-written summary
UV-C treated peach extract reduced conidial germination threefold.
- Taxon
- Prunus persicaPrunus persicae0
- Treatment
- UV-C treated peach extracte1
- Outcome
- percent conidia germinatione1
- Direction
- reducede1
- Value
- 3 foldse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Prunus persica”
e1“Antifungal activity to the fungal conidia in UV-C treated peach extract showed that the percent conidia germination was reduced 3 folds”
Claim · model-written summary
Preharvest latent brown rot infection was significantly reduced.
- Taxon
- Prunus persicaPrunus persicae0
- Outcome
- Preharvest infection of brown rote1
- Direction
- reducede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Prunus persica”
e1“Preharvest infection of brown rot which indicated latent infection was significantly reduced”
Claim · model-written summary
UV-C dose was negatively related to colony-forming units.
- Taxon
- Prunus persicaPrunus persicae0
- Treatment
- UV-C dose of 1.3 to 40×10 4 ergs /mm 2e1
- Outcome
- colony forming unitse1
- Direction
- negativee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Prunus persica”
e1“A negative relationship between UV-C dose of 1.3 to 40×10 4 ergs /mm 2 , colony forming units and number of decaying brown rot lesions were found”
Claim · model-written summary
UV-C dose was negatively related to decaying brown rot lesions.
- Taxon
- Prunus persicaPrunus persicae0
- Treatment
- UV-C dose of 1.3 to 40×10 4 ergs /mm 2e1
- Outcome
- number of decaying brown rot lesionse1
- Direction
- negativee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Prunus persica”
e1“A negative relationship between UV-C dose of 1.3 to 40×10 4 ergs /mm 2 , colony forming units and number of decaying brown rot lesions were found”
The same questions in other papers
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- no effect
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light · Monilinia fructicola · Prunus persica (peach)Positive and negative results
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uv · disease · Prunus persica (peach)Results agree
10 papers in the same direction as this paper
- positive
- positive
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See all 11 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.