Paper · 1990 · Journal of the American Society for Horticultural Science

Physiological and Quality Responses of `Bartlett' Pears to Reduced O2 and Enhanced CO2 Levels and Storage Temperature

Dangyang Ke; Hendrik van Gorsel; Adel A. Kader

11
claims
22
verbatim quotes
74
citations
1
research areas
✓
Open access

Abstract

`Bartlett' pears (Pyrus communis L.) tolerated up to 10 days of exposure to atmospheres containing 1.0%, 0.5%, or 0.25% O 2 at 0, 5, or 10C without any detrimental effects on their quality attributes. The fruits also tolerated 4 to 6 days of exposure to air enriched with 20%, 50%, or 80% CO 2 at the three temperatures. The beneficial effects of exposures to the O 2 -reduced or CO 2 -enriched atmospheres included reduction of respiration and ethylene production rates and retardation of skin yellowing and flesh softening. While 1.0% or 0.5% O 2 and 20% CO 2 did not increase ethanol and acetaldehyde contents, 0.25% O 2 slightly increased and 50% or 80% CO 2 dramatically increased the contents of these two volatiles in juice of the fruits. The effects of low O 2 or high CO 2 on the above attributes generally became more pronounced at the higher temperatures. The low O 2 or high CO 2 treatments did not significantly affect either soluble solids content or titratable acidity. Low O 2 did not influence, but high CO 2 slightly increased pH of the fruits.

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Claims 11

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Bartlett pears tolerated up to 10 days of 1.0%, 0.5% or 0.25% O2 at 0, 5 or 10 C without detrimental effects on quality attributes.

Taxon
Pyrus communisPyrus communise0
Treatment
atmospheres containing 1.0%, 0.5%, or 0.25% O 2e1
Outcome
quality attributese1
Qualifier
up to 10 dayse1

Not reportedComparatorDirection

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Pyrus communis
Pyrus communis · TaxonDidier Descouens · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“`Bartlett' pears (Pyrus communis L.)”

✓ located verbatim in the source · abstract, characters 0–36 · show in text ↑
e1

“tolerated up to 10 days of exposure to atmospheres containing 1.0%, 0.5%, or 0.25% O 2 at 0, 5, or 10C without any detrimental effects on their quality attributes”

✓ located verbatim in the source · abstract, characters 37–199 · show in text ↑
Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Bartlett pears tolerated 4 to 6 days of 20%, 50% or 80% CO2 at the three temperatures without detrimental effects.

Taxon
Pyrus communisPyrus communise0
Treatment
air enriched with 20%, 50%, or 80% CO 2e2
Outcome
toleratede2
Qualifier
4 to 6 dayse2

Not reportedComparatorDirection

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Pyrus communis
Pyrus communis · TaxonDidier Descouens · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“`Bartlett' pears (Pyrus communis L.)”

✓ located verbatim in the source · abstract, characters 0–36 · show in text ↑
e2

“The fruits also tolerated 4 to 6 days of exposure to air enriched with 20%, 50%, or 80% CO 2 at the three temperatures”

✓ located verbatim in the source · abstract, characters 201–319 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Low O2 and high CO2 atmospheres reduced respiration and ethylene production rates of pears.

Taxon
Pyrus communisPyrus communise0
Treatment
O 2 -reduced or CO 2 -enriched atmospherese3
Outcome
respiration and ethylene production ratese3
Direction
reductione3

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Pyrus communis
Pyrus communis · TaxonDidier Descouens · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“`Bartlett' pears (Pyrus communis L.)”

✓ located verbatim in the source · abstract, characters 0–36 · show in text ↑
e3

“The beneficial effects of exposures to the O 2 -reduced or CO 2 -enriched atmospheres included reduction of respiration and ethylene production rates and retardation of skin yellowing and flesh softening”

✓ located verbatim in the source · abstract, characters 321–524 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Low O2 and high CO2 atmospheres retarded skin yellowing and flesh softening of pears.

Taxon
Pyrus communisPyrus communise0
Treatment
O 2 -reduced or CO 2 -enriched atmospherese3
Outcome
skin yellowing and flesh softeninge3
Direction
retardatione3

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Pyrus communis
Pyrus communis · TaxonDidier Descouens · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“`Bartlett' pears (Pyrus communis L.)”

✓ located verbatim in the source · abstract, characters 0–36 · show in text ↑
e3

“The beneficial effects of exposures to the O 2 -reduced or CO 2 -enriched atmospheres included reduction of respiration and ethylene production rates and retardation of skin yellowing and flesh softening”

✓ located verbatim in the source · abstract, characters 321–524 · show in text ↑
Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

1.0% or 0.5% O2 and 20% CO2 did not increase ethanol and acetaldehyde contents in pear juice.

Taxon
Pyrus communisPyrus communise0
Organ / stage
juice of the fruitse4
Treatment
1.0% or 0.5% O 2 and 20% CO 2e4
Outcome
ethanol and acetaldehyde contentse4
Direction
did not increasee4

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Pyrus communis
Pyrus communis · TaxonDidier Descouens · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“`Bartlett' pears (Pyrus communis L.)”

✓ located verbatim in the source · abstract, characters 0–36 · show in text ↑
e4

“While 1.0% or 0.5% O 2 and 20% CO 2 did not increase ethanol and acetaldehyde contents, 0.25% O 2 slightly increased and 50% or 80% CO 2 dramatically increased the contents of these two volatiles in juice of the fruits”

✓ located verbatim in the source · abstract, characters 526–744 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

0.25% O2 slightly increased ethanol and acetaldehyde contents in pear juice.

Taxon
Pyrus communisPyrus communise0
Organ / stage
juice of the fruitse4
Treatment
0.25% O 2e4
Outcome
ethanol and acetaldehyde contentse4
Direction
slightly increasede4

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Pyrus communis
Pyrus communis · TaxonDidier Descouens · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“`Bartlett' pears (Pyrus communis L.)”

✓ located verbatim in the source · abstract, characters 0–36 · show in text ↑
e4

“While 1.0% or 0.5% O 2 and 20% CO 2 did not increase ethanol and acetaldehyde contents, 0.25% O 2 slightly increased and 50% or 80% CO 2 dramatically increased the contents of these two volatiles in juice of the fruits”

✓ located verbatim in the source · abstract, characters 526–744 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

50% or 80% CO2 dramatically increased ethanol and acetaldehyde contents in pear juice.

Taxon
Pyrus communisPyrus communise0
Organ / stage
juice of the fruitse4
Treatment
50% or 80% CO 2e4
Outcome
ethanol and acetaldehyde contentse4
Direction
dramatically increasede4

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Pyrus communis
Pyrus communis · TaxonDidier Descouens · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“`Bartlett' pears (Pyrus communis L.)”

✓ located verbatim in the source · abstract, characters 0–36 · show in text ↑
e4

“While 1.0% or 0.5% O 2 and 20% CO 2 did not increase ethanol and acetaldehyde contents, 0.25% O 2 slightly increased and 50% or 80% CO 2 dramatically increased the contents of these two volatiles in juice of the fruits”

✓ located verbatim in the source · abstract, characters 526–744 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

The effects of low O2 or high CO2 on the measured attributes were more pronounced at higher storage temperatures.

Taxon
Pyrus communisPyrus communise0
Treatment
low O 2 or high CO 2e5
Outcome
the above attributese5
Direction
more pronouncede5
Qualifier
at the higher temperaturese5

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Pyrus communis
Pyrus communis · TaxonDidier Descouens · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“`Bartlett' pears (Pyrus communis L.)”

✓ located verbatim in the source · abstract, characters 0–36 · show in text ↑
e5

“The effects of low O 2 or high CO 2 on the above attributes generally became more pronounced at the higher temperatures”

✓ located verbatim in the source · abstract, characters 746–865 · show in text ↑
Intervention effectobservedoriginal resultno effectnot significant (as stated)measured

Claim · model-written summary

Low O2 or high CO2 treatments did not significantly affect soluble solids content or titratable acidity of pears.

Taxon
Pyrus communisPyrus communise0
Treatment
low O 2 or high CO 2 treatmentse6
Outcome
soluble solids content or titratable aciditye6
Direction
did not significantly affecte6

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Pyrus communis
Pyrus communis · TaxonDidier Descouens · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“`Bartlett' pears (Pyrus communis L.)”

✓ located verbatim in the source · abstract, characters 0–36 · show in text ↑
e6

“The low O 2 or high CO 2 treatments did not significantly affect either soluble solids content or titratable acidity”

✓ located verbatim in the source · abstract, characters 867–983 · show in text ↑
Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Low O2 did not influence the pH of pear fruits.

Taxon
Pyrus communisPyrus communise0
Treatment
Low O 2e7
Outcome
pHe7
Direction
did not influencee7

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Pyrus communis
Pyrus communis · TaxonDidier Descouens · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“`Bartlett' pears (Pyrus communis L.)”

✓ located verbatim in the source · abstract, characters 0–36 · show in text ↑
e7

“Low O 2 did not influence, but high CO 2 slightly increased pH of the fruits”

✓ located verbatim in the source · abstract, characters 985–1061 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

High CO2 slightly increased the pH of pear fruits.

Taxon
Pyrus communisPyrus communise0
Treatment
high CO 2e7
Outcome
pHe7
Direction
slightly increasede7

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Pyrus communis
Pyrus communis · TaxonDidier Descouens · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“`Bartlett' pears (Pyrus communis L.)”

✓ located verbatim in the source · abstract, characters 0–36 · show in text ↑
e7

“Low O 2 did not influence, but high CO 2 slightly increased pH of the fruits”

✓ located verbatim in the source · abstract, characters 985–1061 · show in text ↑

co2 · quality: sugar starch · Pyrus communis (pear)Results differ

2 papers: 1 positive, 1 negative or no effect

1 in the opposite direction

  1. positive
See all 2 papers →

co2 · molecular: metabolites · Pyrus communis (pear)Positive and negative results

4 papers: 3 positive, 1 negative or no effect

3 in the opposite direction

  1. positive
  2. positive
  3. positive
See all 4 papers →

co2 · disease · Pyrus communis (pear)Results agree

2 papers: 2 positive, 0 negative or no effect

1 paper in the same direction as this paper

  1. positive
See all 2 papers →

co2 · physiology: hormones · Pyrus communis (pear)Results agree

4 papers: 4 positive, 0 negative or no effect

3 papers in the same direction as this paper

  1. positive
  2. positive
  3. positive
See all 4 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.