Abstract
Ethylene induces postharvest problems in many fruits, including members of the Cucurbitaceae. The effects of ethylene and its antagonist 1-methylcyclopropene (1-MCP) were studied on cucumber fruit, a cucurbit harvested immature. Beit Alpha cucumbers (cv. Manar) were harvested and exposed to 0.5 or 1.0 μL·L -1 1-MCP prior to exposure to ethylene at 10 μL·L -1 at 15 °C. Fruit exposed to ethylene exhibited significant quality loss upon exposure to ethylene, including epidermal yellowing, a 40% reduction in firmness and, following longer exposure (6 d), epidermal sloughing and placental watersoaking. After 8 d, cucumbers exhibited a 75% reduction in firmness and acute pathogen incidence. Control fruit (no ethylene, no 1-MCP) were visually acceptable but firmness had declined 30% compared with initial values. Fruit exposed to 1-MCP were resistant to applied ethylene, with firmness declining 10 (1.0 μL·L -1 1-MCP) to 20% (0.5 μL·L -1 ) during storage for 14 d at 15 °C. Firmness of fruit treated with 1-MCP at 1.0 μL·L -1 was 28% higher than controls receiving only air, suggesting that ethylene production contributes to softening of cucumber during storage. The softening and watersoaking of fruit treated with ethylene was accompanied by downshifts in pectin mol mass. Fruit exposed to 1-MCP showed significantly reduced mol mass downshifts. The data indicate that cucumber show a PCD response to ethylene that is largely prevented by suppression of ethylene perception. The response of cucumber to ethylene parallels that for other cucurbits, and provides additional information that the benefits of 1-MCP extend beyond application to climacteric fruits.
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Claims 13
Claim · model-written summary
Ethylene exposure reduced cucumber fruit firmness by 40%.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Prolongs Cucumber Fruit Shelf Life”
e1“Fruit exposed to ethylene exhibited significant quality loss upon exposure to ethylene, including epidermal yellowing, a 40% reduction in firmness and, following longer exposure (6 d), epidermal sloughing and placental watersoaking”
Claim · model-written summary
Ethylene exposure caused epidermal yellowing in cucumber fruit.
- Taxon
- Cucumber
Cucumis sativust0 - Treatment
- ethylenee1
- Outcome
- epidermal yellowinge1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Prolongs Cucumber Fruit Shelf Life”
e1“Fruit exposed to ethylene exhibited significant quality loss upon exposure to ethylene, including epidermal yellowing, a 40% reduction in firmness and, following longer exposure (6 d), epidermal sloughing and placental watersoaking”
Claim · model-written summary
After longer ethylene exposure (6 d), cucumber fruit showed epidermal sloughing and placental watersoaking.
- Taxon
- CucumberCucumis sativust0
- Treatment
- ethylenee1
- Outcome
- epidermal sloughing and placental watersoakinge1
- Qualifier
- following longer exposure (6 d)e1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Prolongs Cucumber Fruit Shelf Life”
e1“Fruit exposed to ethylene exhibited significant quality loss upon exposure to ethylene, including epidermal yellowing, a 40% reduction in firmness and, following longer exposure (6 d), epidermal sloughing and placental watersoaking”
Claim · model-written summary
After 8 d, cucumbers showed a 75% reduction in firmness.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Prolongs Cucumber Fruit Shelf Life”
e3“After 8 d, cucumbers exhibited a 75% reduction in firmness and acute pathogen incidence”
Claim · model-written summary
After 8 d, cucumbers showed acute pathogen incidence.
- Taxon
- CucumberCucumis sativust0
- Outcome
- acute pathogen incidencee3
- Qualifier
- After 8 de3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Prolongs Cucumber Fruit Shelf Life”
e3“After 8 d, cucumbers exhibited a 75% reduction in firmness and acute pathogen incidence”
Claim · model-written summary
Control fruit without ethylene or 1-MCP lost 30% firmness compared with initial values.
- Taxon
- CucumberCucumis sativust0
- Outcome
- firmnesse4
- Direction
- declinede4
- Value
- 30%e4
- Qualifier
- no ethylene, no 1-MCPe4
- Comparator
- initial valuese4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Prolongs Cucumber Fruit Shelf Life”
e4“Control fruit (no ethylene, no 1-MCP) were visually acceptable but firmness had declined 30% compared with initial values”
Claim · model-written summary
Fruit treated with 1.0 μL·L -1 1-MCP showed a 10% firmness decline during storage, against ethylene exposure.
- Taxon
- CucumberCucumis sativust0
- Treatment
- 1.0 μL·L -1 1-MCPe5
- Outcome
- firmnesse5
- Direction
- declininge5
- Value
- 10e5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Prolongs Cucumber Fruit Shelf Life”
e5“Fruit exposed to 1-MCP were resistant to applied ethylene, with firmness declining 10 (1.0 μL·L -1 1-MCP) to 20% (0.5 μL·L -1 ) during storage for 14 d at 15 °C”
Claim · model-written summary
Fruit treated with 0.5 μL·L -1 1-MCP showed a 20% firmness decline during storage.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Prolongs Cucumber Fruit Shelf Life”
e5“Fruit exposed to 1-MCP were resistant to applied ethylene, with firmness declining 10 (1.0 μL·L -1 1-MCP) to 20% (0.5 μL·L -1 ) during storage for 14 d at 15 °C”
Claim · model-written summary
Fruit treated with 1-MCP at 1.0 μL·L -1 was 28% firmer than air-only controls.
- Taxon
- CucumberCucumis sativust0
- Treatment
- 1-MCP at 1.0 μL·L -1e6
- Outcome
- Firmnesse6
- Direction
- highere6
- Value
- 28%e6
- Comparator
- controls receiving only aire6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Prolongs Cucumber Fruit Shelf Life”
e6“Firmness of fruit treated with 1-MCP at 1.0 μL·L -1 was 28% higher than controls receiving only air, suggesting that ethylene production contributes to softening of cucumber during storage”
Claim · model-written summary
Ethylene production is suggested to contribute to softening of cucumber during storage.
- Taxon
- CucumberCucumis sativust0
- Outcome
- softening of cucumber during storagee6
- Qualifier
- ethylene productione6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Prolongs Cucumber Fruit Shelf Life”
e6“Firmness of fruit treated with 1-MCP at 1.0 μL·L -1 was 28% higher than controls receiving only air, suggesting that ethylene production contributes to softening of cucumber during storage”
Claim · model-written summary
Softening and watersoaking of ethylene-treated fruit were accompanied by pectin molecular mass downshifts.
- Taxon
- CucumberCucumis sativust0
- Treatment
- ethylenee7
- Outcome
- pectin mol masse7
- Direction
- downshiftse7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Prolongs Cucumber Fruit Shelf Life”
e7“The softening and watersoaking of fruit treated with ethylene was accompanied by downshifts in pectin mol mass”
Claim · model-written summary
1-MCP significantly reduced pectin molecular mass downshifts in cucumber fruit.
- Taxon
- CucumberCucumis sativust0
- Treatment
- 1-MCPe1
- Outcome
- mol mass downshiftse1
- Direction
- reducede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Prolongs Cucumber Fruit Shelf Life”
e1“Fruit exposed to 1-MCP showed significantly reduced mol mass downshifts”
Claim · model-written summary
The cucumber PCD response to ethylene is largely prevented by suppression of ethylene perception.
- Taxon
- cucumberCucumis sativuse1
- Outcome
- PCD responsee1
- Qualifier
- suppression of ethylene perceptione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Prolongs Cucumber Fruit Shelf Life”
e1“The data indicate that cucumber show a PCD response to ethylene that is largely prevented by suppression of ethylene perception”
The same questions in other papers
1-methylcyclopropene · quality: postharvest · Cucumis sativus (cucumber)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
ethene · molecular: metabolites · Cucumis sativus (cucumber)Positive and negative results
2 in the opposite direction
- positive
- positive
ethene · quality: postharvest · Cucumis sativus (cucumber)Results agree
1 paper in the same direction as this paper
- negative
ethene · disease · Cucumis sativus (cucumber)Results agree
3 papers in the same direction as this paper
- negative
- no effect
- 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.