Abstract
This study evaluated the effects of 1-methylcyclopropene (1-MCP) concentration (1000 vs. 625 ppb) and treatment delays (3, 7, and 10 days after harvest) on the ripening and incidence of storage disorders in ‘McIntosh’ apples from three harvest times in 2004. Apples were stored in air at 0 °C to 1 °C for 3 and 6 months or in controlled atmosphere (CA) storage at 3 °C for 6 and 9 months. Apples treated with 1-MCP and held in air or CA storage were firmer than those not treated, but this difference in firmness was less with later harvests, more delay before 1-MCP treatment, and longer storage time. Apples treated with 1000 ppb 1-MCP were often firmer than those treated with 625 ppb after 6 months of storage and/or 7 days at 22 °C. Ethylene and carbon dioxide (CO 2 ) production were reduced in apples treated with 1-MCP, especially in fruit from the first harvest and those treated 3 days after harvest. Fruit treated with 1000 ppb 1-MCP showed a slower increase in ethylene production than those treated with 625 ppb during 14 days at 22 °C after storage. CO 2 production was the lowest in ‘McIntosh’ apples treated with 1000 ppb 1-MCP 3 days after harvest, but fruit treated with 625 ppb also exhibited lower respiration than those not treated. Storage disorders were most prevalent in ‘McIntosh’ apples stored for 6 months in air at 0 °C to 1 °C, whereas fruit from the first harvest treated with 1-MCP 3 days after harvest developed the fewest disorders. 1-MCP reduced the incidence of superficial scald, flesh browning, core browning, and senescent breakdown, while 1-MCP concentration and treatment delay had varying effects. This research has provided the basis for Canadian registration of SmartFresh SM use on apples at 1000 ppb 1-MCP and for the requirement that treatment be within 3 days of harvest.
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Claims 13
Claim · model-written summary
1-MCP treated apples remained firmer than untreated apples in air or controlled atmosphere storage.
- Taxon
- Apples
Malus domesticae0 - Treatment
- 1-MCPe0
- Outcome
- firmere0
- Direction
- firmere0
- Comparator
- those not treatede0
- Setting
- air or CA storagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Apples treated with 1-MCP and held in air or CA storage were firmer than those not treated”
Claim · model-written summary
The firmness benefit of 1-MCP weakened with later harvest, longer treatment delay and longer storage.
- Taxon
- ApplesMalus domesticat0
- Treatment
- 1-MCP treatmente0
- Outcome
- difference in firmnesse0
- Direction
- lesse0
- Qualifier
- later harvests, more delay before 1-MCP treatment, and longer storage timee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“this difference in firmness was less with later harvests, more delay before 1-MCP treatment, and longer storage time.”
t0“Apples”
Claim · model-written summary
1000 ppb 1-MCP often retained greater firmness than 625 ppb.
- Taxon
- ApplesMalus domesticae0
- Treatment
- 1000 ppb 1-MCPe0
- Outcome
- firmere0
- Direction
- firmere0
- Qualifier
- after 6 months of storage and/or 7 days at 22 °Ce0
- Comparator
- 625 ppbe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Apples treated with 1000 ppb 1-MCP were often firmer than those treated with 625 ppb after 6 months of storage and/or 7 days at 22 °C.”
Claim · model-written summary
1-MCP reduced apple ethylene production.
- Taxon
- applesMalus domesticae0
- Treatment
- 1-MCPe0
- Outcome
- Ethylenee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ethylene and carbon dioxide (CO 2 ) production were reduced in apples treated with 1-MCP”
Claim · model-written summary
1-MCP reduced apple carbon dioxide production.
- Taxon
- applesMalus domesticae0
- Treatment
- 1-MCPe0
- Outcome
- carbon dioxide (CO 2 ) productione0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ethylene and carbon dioxide (CO 2 ) production were reduced in apples treated with 1-MCP”
Claim · model-written summary
1000 ppb 1-MCP slowed ethylene production increase compared with 625 ppb during 14 days at 22 °C.
- Taxon
- ApplesMalus domesticat0
- Treatment
- 1000 ppb 1-MCPe0
- Outcome
- ethylene productione0
- Direction
- slower increasee0
- Qualifier
- during 14 days at 22 °C after storagee0
- Comparator
- 625 ppbe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fruit treated with 1000 ppb 1-MCP showed a slower increase in ethylene production than those treated with 625 ppb during 14 days at 22 °C after storage.”
t0“Apples”
Claim · model-written summary
CO2 production was lowest with 1000 ppb 1-MCP applied three days after harvest.
- Taxon
- ‘McIntosh’ applese0
- Treatment
- 1000 ppb 1-MCP 3 days after harveste0
- Outcome
- CO 2 productione0
- Direction
- loweste0
Not reportedComparator
Verbatim
e0“CO 2 production was the lowest in ‘McIntosh’ apples treated with 1000 ppb 1-MCP 3 days after harvest”
Claim · model-written summary
625 ppb 1-MCP reduced respiration relative to untreated fruit.
- Taxon
- ApplesMalus domesticat0
- Treatment
- 625 ppbe0
- Outcome
- respiratione0
- Direction
- lowere0
- Comparator
- those not treatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“fruit treated with 625 ppb also exhibited lower respiration than those not treated.”
t0“Apples”
Claim · model-written summary
Storage disorders were most prevalent after six months of air storage at 0 to 1 °C.
Verbatim
e0“Storage disorders were most prevalent in ‘McIntosh’ apples stored for 6 months in air at 0 °C to 1 °C”
Claim · model-written summary
First-harvest fruit treated three days after harvest had the fewest storage disorders.
- Taxon
- ApplesMalus domesticat0
- Treatment
- 1-MCP 3 days after harveste0
- Outcome
- disorderse0
- Direction
- feweste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“fruit from the first harvest treated with 1-MCP 3 days after harvest developed the fewest disorders.”
t0“Apples”
Claim · model-written summary
1-MCP reduced superficial scald, flesh browning and core browning.
- Taxon
- ApplesMalus domesticat0
- Treatment
- 1-MCPe0
- Outcome
- incidence of superficial scald, flesh browning, core browninge0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“1-MCP reduced the incidence of superficial scald, flesh browning, core browning, and senescent breakdown”
t0“Apples”
Claim · model-written summary
1-MCP reduced senescent breakdown.
- Taxon
- ApplesMalus domesticat0
- Treatment
- 1-MCPe0
- Outcome
- senescent breakdowne0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“1-MCP reduced the incidence of superficial scald, flesh browning, core browning, and senescent breakdown”
t0“Apples”
Claim · model-written summary
The study supported Canadian registration of 1000 ppb 1-MCP for apples and treatment within three days of harvest.
- Taxon
- applesMalus domesticae0
- Treatment
- 1000 ppb 1-MCPe0
- Outcome
- requirement that treatment be within 3 days of harveste0
- Setting
- Canadiane0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This research has provided the basis for Canadian registration of SmartFresh SM use on apples at 1000 ppb 1-MCP and for the requirement that treatment be within 3 days of harvest.”
The same questions in other papers
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- positive
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See all 99 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.