Abstract
This study was conducted to compare the quality of baby leaves grown under several temperature conditions and the storage properties of MA storage for romaine lettuce. It was grown for 5 weeks under an artificial light source (200 μmol·m-2·s-1) in a chamber at 21oC, 28oC, and 35oC. The growth and quality of red romaine lettuce that grown in different temperatures were investigated at the end of cultivation, and the oxygen, carbon dioxide, and ethylene concentrations in the 20,000 cc OTR film and perforated film packed with lettuces were measured for 36 and 12 days, respectively. The red romaine lettuce baby leaf was examined for color, chlorophyll, and visual quality at the end of storage. The maximum quantum yield of baby leaf grown in different temperatures at 7days before the harvest was higher at 21oC and 28oC growth temperature treatments. On harvest day, the leaf length measured was longest at 28oC, and the leaf width was wider at 21oC and 28oC, and the number of leaves was similar to 5-6 at all cultivation temperatures. Leaf weight, root weight, and dry weight were found to be higher at 21oC, and tended to decrease as the cultivation temperature increased. The concentration of ethylene in the film of the MA storage treatments was maintained at 1~2 μL·L-1 until the end of storage in all treatments regardless of the cultivation temperature. Oxygen concentration in the MA treatment used 20,000 OTR film was maintained at around 19.5%, and carbon dioxide concentration around 1% that was satisfied the CA conditions. Both Hunter a* and b* values were generally higher in the MA storage treatment at the end of storage day. The chlorophyll content was decreased as the cultivation temperature increased, and was lower in the MA storage treatment than in the perforated film treatment. Visual quality was 3 points or higher in the MA storage treatment at 21oC growth treatment, and it was maintained marketability. As the above results, the growth of baby leaves of romaine lettuce was the best at 21oC treatment, and the lower the cultivation temperature, the longer the shelf life. And it was possible to extend the shelf life by 3 times by showing excellent visual quality at the MA storage treatment that satisfies the carbon dioxide concentration of CA condition until the end of storage day.
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Claims 14
Claim · model-written summary
Maximum quantum yield of baby leaves 7 days before harvest was higher at 21oC and 28oC growth temperatures.
Not reportedComparator
Verbatim
e0“The maximum quantum yield of baby leaf grown in different temperatures at 7days before the harvest was higher at 21oC and 28oC growth temperature treatments”
t0“Red Romaine Baby Leaves”
Claim · model-written summary
Leaf length at harvest was longest at 28oC.
Not reportedComparator
Verbatim
e0“the leaf length measured was longest at 28oC”
t0“Red Romaine Baby Leaves”
Claim · model-written summary
Leaf width at harvest was wider at 21oC and 28oC.
Not reportedComparator
Verbatim
e0“the leaf width was wider at 21oC and 28oC”
t0“Red Romaine Baby Leaves”
Claim · model-written summary
Number of leaves was similar, 5-6, at all cultivation temperatures.
- Taxon
- Red Romainet0
- Treatment
- cultivation temperaturese0
- Outcome
- number of leavese0
- Direction
- similare0
- Value
- 5-6e0
Not reportedComparator
Verbatim
e0“the number of leaves was similar to 5-6 at all cultivation temperatures”
t0“Red Romaine Baby Leaves”
Claim · model-written summary
Leaf weight, root weight and dry weight were higher at 21oC and tended to decrease as cultivation temperature increased.
- Taxon
- Red Romainet0
- Treatment
- cultivation temperaturee0
- Outcome
- Leaf weight, root weight, and dry weighte0
- Direction
- highere0
Not reportedComparator
Verbatim
e0“Leaf weight, root weight, and dry weight were found to be higher at 21oC, and tended to decrease as the cultivation temperature increased”
t0“Red Romaine Baby Leaves”
Claim · model-written summary
Ethylene concentration in the film of MA storage treatments stayed at 1~2 uL/L until the end of storage regardless of cultivation temperature.
Verbatim
e0“The concentration of ethylene in the film of the MA storage treatments was maintained at 1~2 μL·L-1 until the end of storage in all treatments regardless of the cultivation temperature”
t0“Red Romaine Baby Leaves”
Claim · model-written summary
Oxygen concentration in the MA treatment with 20,000 OTR film stayed around 19.5%.
Verbatim
e0“Oxygen concentration in the MA treatment used 20,000 OTR film was maintained at around 19.5%”
t0“Red Romaine Baby Leaves”
Claim · model-written summary
Carbon dioxide concentration in the MA treatment stayed around 1%, satisfying CA conditions.
Verbatim
e0“carbon dioxide concentration around 1%”
t0“Red Romaine Baby Leaves”
Claim · model-written summary
Hunter a* and b* values were generally higher in the MA storage treatment at the end of storage.
Not reportedComparator
Verbatim
e0“Both Hunter a* and b* values were generally higher in the MA storage treatment at the end of storage day”
t0“Red Romaine Baby Leaves”
Claim · model-written summary
Chlorophyll content decreased as cultivation temperature increased.
Verbatim
e0“The chlorophyll content was decreased as the cultivation temperature increased”
t0“Red Romaine Baby Leaves”
Claim · model-written summary
Chlorophyll content was lower in the MA storage treatment than in the perforated film treatment.
Verbatim
e0“The chlorophyll content was decreased as the cultivation temperature increased, and was lower in the MA storage treatment than in the perforated film treatment”
t0“Red Romaine Baby Leaves”
Claim · model-written summary
Visual quality was 3 points or higher in the MA storage treatment at 21oC growth temperature, maintaining marketability.
Verbatim
e0“Visual quality was 3 points or higher in the MA storage treatment at 21oC growth treatment”
t0“Red Romaine Baby Leaves”
Claim · model-written summary
The lower the cultivation temperature, the longer the shelf life.
Verbatim
e0“the lower the cultivation temperature, the longer the shelf life”
t0“Red Romaine Baby Leaves”
Claim · model-written summary
MA storage with carbon dioxide at CA condition extended shelf life by 3 times through excellent visual quality.
Not reportedComparator
Verbatim
e0“possible to extend the shelf life by 3 times by showing excellent visual quality at the MA storage treatment”
t0“Red Romaine Baby Leaves”