Abstract
Abstract An atmosphere of air + 15% CO 2 caused CO 2 injury in lettuce ( Lactuca sativa L.) in about 10 days at 0°C. However, subsequent removal of CO 2 was necessary for the brown stain symptoms to develop. Under CO 2 treatment, phenylalanine ammonia lyase (PAL) was induced and its activity correlated well with the development of the injury. Nevertheless, PAL activity did not seem responsible for the differences in susceptibility to CO 2 injury among the 3 lettuce cultivars included in this study. Prevention of the development of brown stain symptoms by CO 2 probably was due to its inhibition of phenolics production and the inhibition of polyphenol oxidase activity.
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Claims 6
Claim · model-written summary
Air with 15% CO 2 caused lettuce injury after about 10 days at 0°C.
- Taxon
- lettuce
Lactuca sativae0 - Treatment
- air + 15% CO 2e0
- Outcome
- CO 2 injurye0
- Qualifier
- about 10 days at 0°Ce0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“An atmosphere of air + 15% CO 2 caused CO 2 injury in lettuce ( Lactuca sativa L.) in about 10 days at 0°C.”
Claim · model-written summary
Removal of CO 2 was necessary for brown stain symptoms to develop.
Not reportedTaxonComparatorDirection
Verbatim
e0“subsequent removal of CO 2 was necessary for the brown stain symptoms to develop”
Claim · model-written summary
CO 2 treatment induced PAL activity.
- Treatment
- CO 2 treatmente0
- Gene
- phenylalanine ammonia lyase (PAL)e0
- Outcome
- phenylalanine ammonia lyase (PAL)e0
- Direction
- inducede0
Not reportedTaxonComparator
Verbatim
e0“Under CO 2 treatment, phenylalanine ammonia lyase (PAL) was induced”
Claim · model-written summary
PAL activity correlated with injury development.
- Outcome
- development of the injurye0
Not reportedTaxonDirection
Verbatim
e0“its activity correlated well with the development of the injury”
Claim · model-written summary
PAL activity did not explain cultivar differences in CO 2 injury susceptibility.
- Taxon
- lettuceLactuca sativae0
- Gene
- PALe0
- Outcome
- differences in susceptibility to CO 2 injurye0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PAL activity did not seem responsible for the differences in susceptibility to CO 2 injury among the 3 lettuce cultivars”
Claim · model-written summary
CO 2 apparently prevented brown stain by inhibiting phenolics production and polyphenol oxidase.
- Outcome
- brown stain symptomse0
- Qualifier
- inhibition of phenolics production and the inhibition of polyphenol oxidase activitye0
Not reportedTaxonDirection
Verbatim
e0“Prevention of the development of brown stain symptoms by CO 2 probably was due to its inhibition of phenolics production and the inhibition of polyphenol oxidase activity.”
The same questions in other papers
co2 · disease · Lactuca sativa (garden lettuce)Positive and negative results
1 paper in the same direction as this paper · 3 in the opposite direction
- positive
- positive
- positive
1 paper more in this group
See all 5 papers →co2 · crop injury · Lactuca sativa (garden lettuce)Results agree
3 papers in the same direction as this paper
- negative
- negative
- negative
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.