Abstract
Broccoli (Brassica oleracea L., cv. Keirin) is a highly perishable produce and its postharvest life and quality greatly depend on storage conditions, such as temperature, atmosphere composition, relative humidity and packaging films. The effect of modified atmosphere packaging (MAP) on the quality of broccoli heads was investigated in the present study. Broccoli was packaged with four different types of films: polypropylene (PP), micro–perforated polypropylene (PP hole), oriented polypropylene (OPP) and low density polyethylene (LDPE), and then stored at 15ºC for 13 days to study the effects of modified atmosphere packaging (MAP) on the maintenance of quality and functional properties by comparison with non–packaged broccoli as a control. Results indicated that deterioration occurred quickly in the control broccoli due to a relatively high rate of metabolism and a consequent high respiration rate and ethylene production, manifested mainly by weight loss, yellowing and chlorophyll degradation. Also, a rapid decrease in ascorbic acid and total phenolic concentration was observed. Conversely, in those broccoli packaged under MAP, especially for LDPE, all changes related with loss of quality were significantly reduced and delayed with time. Moreover, levels of total carotenoids and total phenolic compounds remained during the whole period. Thus, broccoli packaged with LDPE film had prolonged storability up to 10 days at 15ºC with high quality, this period being only 4 days in control broccoli.
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Claims 6
Claim · model-written summary
Unpackaged broccoli deteriorated quickly, with weight loss, yellowing, and chlorophyll degradation.
- Taxon
- broccoli
Brassica oleracea var. italicae0 - Outcome
- weight loss, yellowing and chlorophyll degradatione0
- Direction
- deterioration occurred quicklye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“deterioration occurred quickly in the control broccoli due to a relatively high rate of metabolism and a consequent high respiration rate and ethylene production, manifested mainly by weight loss, yellowing and chlorophyll degradation.”
Claim · model-written summary
Unpackaged broccoli had rapid declines in ascorbic acid and total phenolic concentration.
- Taxon
- BroccoliBrassica oleracea var. italicat0
- Outcome
- ascorbic acid and total phenolic concentratione0
- Direction
- rapid decreasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a rapid decrease in ascorbic acid and total phenolic concentration was observed.”
t0“Broccoli”
Claim · model-written summary
Modified atmosphere packaging, especially LDPE, significantly reduced and delayed quality loss.
- Taxon
- broccoliBrassica oleracea var. italicae0
- Treatment
- LDPEe0
- Outcome
- loss of qualitye0
- Direction
- reduced and delayede0
- Comparator
- non–packaged broccolie1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in those broccoli packaged under MAP, especially for LDPE, all changes related with loss of quality were significantly reduced and delayed with time.”
e1“by comparison with non–packaged broccoli as a control”
Claim · model-written summary
Total carotenoid levels remained over the storage period in packaged broccoli.
- Taxon
- BroccoliBrassica oleracea var. italicat0
- Outcome
- levels of total carotenoidse0
- Direction
- remainede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“levels of total carotenoids and total phenolic compounds remained during the whole period.”
t0“Broccoli”
Claim · model-written summary
Total phenolic compound levels remained over the storage period in packaged broccoli.
- Taxon
- BroccoliBrassica oleracea var. italicat0
- Outcome
- total phenolic compoundse0
- Direction
- remainede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“levels of total carotenoids and total phenolic compounds remained during the whole period.”
t0“Broccoli”
Claim · model-written summary
LDPE packaging prolonged broccoli storability to 10 days at 15ºC versus 4 days for controls.
- Taxon
- broccoliBrassica oleracea var. italicae0
- Treatment
- LDPE filme0
- Outcome
- storabilitye0
- Direction
- prolongede0
- Value
- 10 dayse0
- Qualifier
- 4 dayse0
- Comparator
- control broccolie0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“broccoli packaged with LDPE film had prolonged storability up to 10 days at 15ºC with high quality, this period being only 4 days in control broccoli.”