Abstract
In this study the influence of soil and soilless growing systems (substrate 3:1 v/v perlite:peat) on quality and microbial traits of three multi-leaf lettuce cultivars (two green, ‘Eztoril’ and ‘Ezabel’, and one red, ‘Ezra’) was evaluated at harvest and after 7 and 13 days of storage at 8°C. At harvest, ‘Ezra’ showed a respiration activity and a total phenol content respectively 2-fold and 25% significantly higher than the green cultivars. Soil lettuces resulted more stressed than those grown in soilless, as indicated by their initial content in antioxidants. As for nitrate content, soilless grown lettuces at harvest showed an average concentration higher than soil-grown ones, although values are generally lower than limits imposed by the EU Regulation (No. 1258/2011). During storage, soilless lettuces showed no ammonium accumulation, differently from those cultivated in soil. In addition, lettuce cultivars grown in soilless condition showed unchanged content in the antioxidant activity and total phenols, and lower microbial counts than soil lettuces. Results of the present study showed that soilless growing system can positively affect qualitative and microbiological parameter of lettuces studied, and it can be considered a good soilless growing technique in order to obtain high quality multi-leaf lettuces for ready-to-use industry.
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Claims 8
Claim · model-written summary
At harvest the red lettuce ‘Ezra’ had a respiration activity 2-fold significantly higher than the green cultivars.
- Taxon
- lettuce
Lactuca sativat0 - Material
- ‘Ezra’e0
- Outcome
- respiration activitye0
- Direction
- highere0
- Value
- 2-folde0
- Comparator
- the green cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“lettuce”
e0“At harvest, ‘Ezra’ showed a respiration activity and a total phenol content respectively 2-fold and 25% significantly higher than the green cultivars”
Claim · model-written summary
At harvest the red lettuce ‘Ezra’ had a total phenol content 25% significantly higher than the green cultivars.
- Taxon
- lettuceLactuca sativat0
- Material
- ‘Ezra’e0
- Outcome
- total phenol contente0
- Direction
- highere0
- Value
- 25%e0
- Comparator
- the green cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“lettuce”
e0“At harvest, ‘Ezra’ showed a respiration activity and a total phenol content respectively 2-fold and 25% significantly higher than the green cultivars”
Claim · model-written summary
Soil-grown lettuces were more stressed than soilless-grown ones, as indicated by their initial antioxidant content.
- Taxon
- lettuceLactuca sativat0
- Treatment
- Soile0
- Outcome
- initial content in antioxidantse0
- Direction
- more stressede0
- Comparator
- soillesse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“lettuce”
e0“Soil lettuces resulted more stressed than those grown in soilless, as indicated by their initial content in antioxidants”
Claim · model-written summary
At harvest, soilless-grown lettuces had a higher average nitrate content than soil-grown ones, although values were generally lower than the EU regulation limits.
- Taxon
- lettuceLactuca sativat0
- Treatment
- soilless grown lettucese0
- Outcome
- nitrate contente0
- Direction
- highere0
- Qualifier
- values are generally lower than limits imposed by the EU Regulation (No. 1258/2011)e0
- Comparator
- soil-grown onese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“lettuce”
e0“As for nitrate content, soilless grown lettuces at harvest showed an average concentration higher than soil-grown ones, although values are generally lower than limits imposed by the EU Regulation (No. 1258/2011)”
Claim · model-written summary
During storage, soilless-grown lettuces showed no ammonium accumulation, unlike soil-grown ones.
- Taxon
- lettuceLactuca sativat0
- Treatment
- soillesse0
- Outcome
- ammonium accumulatione0
- Direction
- no ammonium accumulatione0
- Comparator
- those cultivated in soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“lettuce”
e0“During storage, soilless lettuces showed no ammonium accumulation, differently from those cultivated in soil”
Claim · model-written summary
Lettuce cultivars grown in soilless condition showed unchanged antioxidant activity and total phenol content during storage.
- Taxon
- lettuceLactuca sativat0
- Treatment
- soilless conditione0
- Outcome
- antioxidant activity and total phenolse0
- Direction
- unchangede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“lettuce”
e0“lettuce cultivars grown in soilless condition showed unchanged content in the antioxidant activity and total phenols, and lower microbial counts than soil lettuces”
Claim · model-written summary
Lettuce cultivars grown in soilless condition had lower microbial counts than soil-grown lettuces.
- Taxon
- lettuceLactuca sativat0
- Treatment
- soilless conditione0
- Outcome
- microbial countse0
- Direction
- lowere0
- Comparator
- soil lettucese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“lettuce”
e0“lettuce cultivars grown in soilless condition showed unchanged content in the antioxidant activity and total phenols, and lower microbial counts than soil lettuces”
Claim · model-written summary
The authors conclude that the soilless growing technique is a good one for obtaining high quality multi-leaf lettuces for the ready-to-use industry.
- Taxon
- lettucesLactuca sativae0
- Treatment
- soilless growing techniquee0
- Outcome
- high quality multi-leaf lettucese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it can be considered a good soilless growing technique in order to obtain high quality multi-leaf lettuces for ready-to-use industry”
The same questions in other papers
growing medium · molecular: metabolites · Lactuca sativa (garden lettuce)Positive and negative results
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See all 5 papers →growing medium · soil: biology · Lactuca sativa (garden lettuce)Results agree
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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.