Abstract
The quality of red lettuce is based on the content of anthocyanin pigments, and the content of these pigments increases when the plant receives ultraviolet radiation. Lettuce crops are increasingly being grown in greenhouses to provide better quality fresh lettuce; however, both quality and productivity are affected by the type of cover used. The effects of UV-transparent and UV-blocking plastic films on the growth and quality of three lettuce cultivars (‘Casabella’ and ‘Vera’, which are both green leaf, and ‘Lollo Rosso’, which is red leaf) were investigated. The crop was cultivated at an altitude of 2576 m a.s.l. to naturally expose it to high ultraviolet radiation. The height and diameter of plants, fresh and dry weight, leaf area index, chlorophyll fluorescence, and leaf colour were determined throughout the crop cycle. Growth characteristics were not significantly influenced by the plastic film in all cultivars, probably due to the high altitude and the high solar radiation received. The UV-transparent film could increase the red colour in ‘Lollo Rosso’, and a higher commercial quality was achieved. No effect of the plastic film on the yield component was observed in the ‘Casabella’ and ‘Vera’ cultivars. The findings of this study provide guidance on what cultivar and plastic film must be used in high-altitude areas where the solar and UV radiation is high.
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Claims 6
Claim · model-written summary
The plastic film did not significantly influence growth characteristics of the lettuce cultivars at high altitude.
- Taxon
- Lactuca sativa L.
Lactuca sativat0 - Treatment
- plastic filme1
- Outcome
- Growth characteristicse1
- Direction
- not significantly influencede1
- Setting
- high altitudee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lettuce (Lactuca sativa L.)”
e1“Growth characteristics were not significantly influenced by the plastic film in all cultivars, probably due to the high altitude and the high solar radiation received”
Claim · model-written summary
The UV-transparent film could increase the red colour of Lollo Rosso lettuce.
- Taxon
- Lactuca sativa L.Lactuca sativat0
- Material
- Lollo Rossoe2
- Treatment
- UV-transparent filme2
- Outcome
- red coloure2
- Direction
- increasee2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lettuce (Lactuca sativa L.)”
e2“The UV-transparent film could increase the red colour in ‘Lollo Rosso’, and a higher commercial quality was achieved”
Claim · model-written summary
The UV-transparent film gave a higher commercial quality of Lollo Rosso lettuce.
- Taxon
- Lactuca sativa L.Lactuca sativat0
- Material
- Lollo Rossoe2
- Treatment
- UV-transparent filme2
- Outcome
- commercial qualitye2
- Direction
- highere2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lettuce (Lactuca sativa L.)”
e2“The UV-transparent film could increase the red colour in ‘Lollo Rosso’, and a higher commercial quality was achieved”
Claim · model-written summary
The plastic film had no effect on the yield component of Casabella lettuce.
- Taxon
- Lactuca sativa L.Lactuca sativat0
- Material
- Casabellae3
- Treatment
- plastic filme3
- Outcome
- yield componente3
- Direction
- No effecte3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lettuce (Lactuca sativa L.)”
e3“No effect of the plastic film on the yield component was observed in the ‘Casabella’ and ‘Vera’ cultivars”
Claim · model-written summary
The plastic film had no effect on the yield component of Vera lettuce.
- Taxon
- Lactuca sativa L.Lactuca sativat0
- Material
- Verae3
- Treatment
- plastic filme3
- Outcome
- yield componente3
- Direction
- No effecte3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lettuce (Lactuca sativa L.)”
e3“No effect of the plastic film on the yield component was observed in the ‘Casabella’ and ‘Vera’ cultivars”
Claim · model-written summary
The findings guide which cultivar and plastic film must be used in high-altitude areas.
- Taxon
- Lactuca sativa L.Lactuca sativat0
- Outcome
- what cultivar and plastic film must be used in high-altitude arease4
- Setting
- high-altitude arease4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lettuce (Lactuca sativa L.)”
e4“The findings of this study provide guidance on what cultivar and plastic film must be used in high-altitude areas”
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See all 24 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.