Abstract
High temperature treatment (HTT) with hot air at 45, 50 or 55°C for 1 to 5 hr prior to storage at 20°C was conducted to delay the yellowing of harvested broccoli florets. HTT at 50°C for 2 and 3 hr were more effective than others for maintaining green color and good quality of broccoli florets. Loss of chlorophyl and increase of carbon dioxide and ethylene production in the florets during storage at 20°C were inhibited by HTT at 50°C for 1, 2 and 3 hr except for the chlorophyll loss of 1 hr treatment. Inhibitions rates increased with in duration of HTT. 1-aminocyclopropane-1-carboxylic acid (ACC) content in florets during storage increased with the same rates in the control and HTT at 50°C for 1 and 2 hr, but the HTT for 3 hr retarded the increase in ACC content. Activity of ACC oxidase in the florets during storage increased remarkably in the control and HTT at 50°C for 1 hr, followed by those with the HTT for 2 hr, which reached maxima and subsequently declined quickly to low levels. However, in the florets with HTT at 50°C for 3 hr, scarcely any enzyme activity was detected during storage. These results suggest that HTT at 50°C for a short-term period would inhibit the conversion of ACC to ethylene and reduce ethylene production resulting in the retardation of yellowing in broccoli florets.
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Claims 11
Claim · model-written summary
Hot air at 50°C for 2 or 3 hours best maintained floret green color and quality.
- Taxon
- broccoli
Brassica oleracea var. italicae0 - Treatment
- HTT at 50°C for 2 and 3 hre0
- Outcome
- green color and good qualitye0
- Direction
- more effectivee0
- Comparator
- otherse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“HTT at 50°C for 2 and 3 hr were more effective than others for maintaining green color and good quality of broccoli florets.”
Claim · model-written summary
Hot air at 50°C for 2 or 3 hours inhibited chlorophyll loss during storage.
- Taxon
- BroccoliBrassica oleracea var. italicat0
- Treatment
- HTT at 50°C for 1, 2 and 3 hre0
- Outcome
- Loss of chlorophyle0
- Direction
- inhibitede0
- Qualifier
- except for the chlorophyll loss of 1 hr treatmente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Loss of chlorophyl and increase of carbon dioxide and ethylene production in the florets during storage at 20°C were inhibited by HTT at 50°C for 1, 2 and 3 hr except for the chlorophyll loss of 1 hr treatment.”
t0“Broccoli Florets”
Claim · model-written summary
Hot air at 50°C for 1 to 3 hours inhibited the rise in carbon dioxide production.
- Taxon
- BroccoliBrassica oleracea var. italicat0
- Treatment
- HTT at 50°C for 1, 2 and 3 hre0
- Outcome
- carbon dioxidee0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Loss of chlorophyl and increase of carbon dioxide and ethylene production in the florets during storage at 20°C were inhibited by HTT at 50°C for 1, 2 and 3 hr except for the chlorophyll loss of 1 hr treatment.”
t0“Broccoli Florets”
Claim · model-written summary
Hot air at 50°C for 1 to 3 hours inhibited the rise in ethylene production.
- Taxon
- BroccoliBrassica oleracea var. italicat0
- Treatment
- HTT at 50°C for 1, 2 and 3 hre0
- Outcome
- ethylene productione0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Loss of chlorophyl and increase of carbon dioxide and ethylene production in the florets during storage at 20°C were inhibited by HTT at 50°C for 1, 2 and 3 hr except for the chlorophyll loss of 1 hr treatment.”
t0“Broccoli Florets”
Claim · model-written summary
Inhibition rates rose with longer hot air exposure.
- Taxon
- BroccoliBrassica oleracea var. italicat0
- Treatment
- HTTe0
- Outcome
- Inhibitions ratese0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inhibitions rates increased with in duration of HTT.”
t0“Broccoli Florets”
Claim · model-written summary
ACC content rose at the same rates in controls and 1 and 2 hour heat treatments.
- Taxon
- BroccoliBrassica oleracea var. italicat0
- Treatment
- HTT at 50°C for 1 and 2 hre0
- Outcome
- 1-aminocyclopropane-1-carboxylic acid (ACC) contente0
- Direction
- same ratese0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“1-aminocyclopropane-1-carboxylic acid (ACC) content in florets during storage increased with the same rates in the control and HTT at 50°C for 1 and 2 hr, but the HTT for 3 hr retarded the increase in ACC content.”
t0“Broccoli Florets”
Claim · model-written summary
Three hours of heat treatment slowed the increase in ACC content.
- Taxon
- BroccoliBrassica oleracea var. italicat0
- Treatment
- HTT for 3 hre0
- Outcome
- ACC contente0
- Direction
- retardede0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“1-aminocyclopropane-1-carboxylic acid (ACC) content in florets during storage increased with the same rates in the control and HTT at 50°C for 1 and 2 hr, but the HTT for 3 hr retarded the increase in ACC content.”
t0“Broccoli Florets”
Claim · model-written summary
ACC oxidase activity rose markedly in controls and after 1 hour of heat treatment.
- Taxon
- BroccoliBrassica oleracea var. italicat0
- Treatment
- HTT at 50°C for 1 hre0
- Gene
- ACC oxidasee0
- Outcome
- Activity of ACC oxidasee0
- Direction
- increased remarkablye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Activity of ACC oxidase in the florets during storage increased remarkably in the control and HTT at 50°C for 1 hr”
t0“Broccoli Florets”
Claim · model-written summary
After 2 hours of heat treatment ACC oxidase activity peaked then fell quickly.
- Taxon
- BroccoliBrassica oleracea var. italicat0
- Treatment
- HTT for 2 hre0
- Outcome
- Activity of ACC oxidasee0
- Direction
- declined quicklye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Activity of ACC oxidase in the florets during storage increased remarkably in the control and HTT at 50°C for 1 hr, followed by those with the HTT for 2 hr, which reached maxima and subsequently declined quickly to low levels.”
t0“Broccoli Florets”
Claim · model-written summary
Three hours of heat treatment left barely detectable ACC oxidase activity during storage.
- Taxon
- BroccoliBrassica oleracea var. italicat0
- Treatment
- HTT at 50°C for 3 hre0
- Outcome
- enzyme activitye0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in the florets with HTT at 50°C for 3 hr, scarcely any enzyme activity was detected during storage.”
t0“Broccoli Florets”
Claim · model-written summary
The authors suggest short heat treatment limits ACC conversion to ethylene, lowering ethylene production and delaying yellowing.
- Taxon
- broccoliBrassica oleracea var. italicae0
- Treatment
- HTT at 50°C for a short-term periode0
- Outcome
- yellowinge0
- Direction
- retardatione0
- Qualifier
- conversion of ACC to ethylenee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“HTT at 50°C for a short-term period would inhibit the conversion of ACC to ethylene and reduce ethylene production resulting in the retardation of yellowing in broccoli florets.”
The same questions in other papers
heat · quality: postharvest · Brassica oleracea (wild cabbage)Results differ
5 papers in the same direction as this paper · 3 in the opposite direction
- no effect
- no effect
- no effect
5 papers more in this group
See all 9 papers →heat · molecular: metabolites · Brassica oleracea (wild cabbage)Positive and negative results
10 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
8 papers more in this group
See all 12 papers →heat · soil: biology · Brassica oleracea (wild cabbage)Results agree
1 paper in the same direction as this paper
- positive
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.