Abstract
Abstract Storage atmospheres with 2-1/2, 5 or 10% CO 2 caused a physiological injury to lettuce almost identical to the brown stain observed in lettuce from rail cars and trailers in which CO 2 concentrations exceeded 2% at destination. Carbon dioxide injury, or brown stain, was not always evident when lettuce was removed from the controlled atmosphere, after 7 days at 38°F, but became more evident during a subsequent 4 days at 50° in air. About 16% of the heads held at 2–1/2% CO 2 developed brown stain while 38% and 86% of the heads developed the disorder in lots held at 5% and 10% CO 2 , respectively. Significantly more heads developed brown stain when the CO 2 was combined with 3% oxygen than when combined with 21% Ο 2 Decay, pink rib, and tipburn were not significantly influenced by the O 2 or CO 2 level. Increased levels of CO 2 reduced the severity of butt discoloration in lettuce examined immediately after storage in the controlled atmosphere, but after an additional 4 days at 50°F in air, the differences were not evident. The danger of physiological injury from 2-1/2 to 10% CO 2 during storage or shipping outweighs the small improvement in butt color and general appearance.
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Claims 8
Claim · model-written summary
Storage atmospheres with 2-1/2, 5 or 10% CO2 caused a physiological injury to lettuce almost identical to brown stain.
- Taxon
- lettuce
Lactuca sativae0 - Treatment
- Storage atmospheres with 2-1/2, 5 or 10% CO 2e0
- Outcome
- physiological injurye0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Storage atmospheres with 2-1/2, 5 or 10% CO 2 caused a physiological injury to lettuce”
Claim · model-written summary
Carbon dioxide injury (brown stain) was not always evident when lettuce was removed from the controlled atmosphere after 7 days at 38 F but became more evident during a subsequent 4 days at 50 in air.
- Taxon
- lettuceLactuca sativae0
- Outcome
- Carbon dioxide injury, or brown staine0
- Qualifier
- became more evident during a subsequent 4 days at 50° in aire0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Carbon dioxide injury, or brown stain, was not always evident when lettuce was removed from the controlled atmosphere, after 7 days at 38°F, but became more evident during a subsequent 4 days at 50° in air”
Claim · model-written summary
About 38% of lettuce heads held at 5% CO2 developed the brown stain disorder.
- Taxon
- LettuceLactuca sativat0
- Treatment
- lots held at 5%e0
- Outcome
- heads developed the disordere0
- Direction
- increaseinferrede0
- Value
- 38%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“38% and 86% of the heads developed the disorder in lots held at 5% and 10% CO 2 , respectively”
t0“Lettuce”
Claim · model-written summary
About 86% of lettuce heads held at 10% CO2 developed the brown stain disorder.
- Taxon
- LettuceLactuca sativat0
- Treatment
- 10% CO 2e0
- Outcome
- heads developed the disordere0
- Direction
- increaseinferrede0
- Value
- 86%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“38% and 86% of the heads developed the disorder in lots held at 5% and 10% CO 2 , respectively”
t0“Lettuce”
Claim · model-written summary
Significantly more lettuce heads developed brown stain when CO2 was combined with 3% oxygen than when combined with 21% oxygen.
- Taxon
- LettuceLactuca sativat0
- Treatment
- CO 2 was combined with 3% oxygene0
- Outcome
- heads developed brown staine0
- Direction
- moree0
- Comparator
- 21%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significantly more heads developed brown stain when the CO 2 was combined with 3% oxygen than when combined with 21%”
t0“Lettuce”
Claim · model-written summary
Decay, pink rib and tipburn of lettuce were not significantly influenced by the O2 or CO2 level.
- Taxon
- LettuceLactuca sativat0
- Treatment
- O 2 or CO 2 levele0
- Outcome
- Decay, pink rib, and tipburne0
- Direction
- no_changeinferrede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Decay, pink rib, and tipburn were not significantly influenced by the O 2 or CO 2 level”
t0“Lettuce”
Claim · model-written summary
Increased CO2 levels reduced the severity of butt discoloration in lettuce examined immediately after controlled-atmosphere storage, but the differences were not evident after an additional 4 days at 50 F in air.
- Taxon
- lettuceLactuca sativae0
- Treatment
- Increased levels of CO 2e0
- Outcome
- severity of butt discoloratione0
- Direction
- reducede0
- Qualifier
- after an additional 4 days at 50°F in air, the differences were not evidente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increased levels of CO 2 reduced the severity of butt discoloration in lettuce examined immediately after storage in the controlled atmosphere, but after an additional 4 days at 50°F in air, the differences were not evident”
Claim · model-written summary
The danger of physiological injury from 2-1/2 to 10% CO2 during storage or shipping outweighs the small improvement in butt color and general appearance.
- Taxon
- LettuceLactuca sativat0
- Outcome
- danger of physiological injury from 2-1/2 to 10% CO 2 during storage or shipping outweighs the small improvement in butt color and general appearancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The danger of physiological injury from 2-1/2 to 10% CO 2 during storage or shipping outweighs the small improvement in butt color and general appearance”
t0“Lettuce”
The same questions in other papers
storage · crop injury · Lactuca sativa (garden lettuce)Positive and negative results
2 in the opposite direction
- positive
- positive
co2 · disease · Lactuca sativa (garden lettuce)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 →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.