Abstract
The current study was conducted to determine the influence of irradiations of different UV spectra on plant growth and antioxidant compounds of two romaine lettuce cultivars('Caesar green' and 'Caesar red'). The UV treatments were consisted of three UV spectra; UV-A (314-400nm), FUV-B (290-400nm) and UV-B (274-400nm), using fluorescent lamps and irradiated for 2 hours at nighttime for 11 days under greenhouse. As the results, there were no differences in growth parameters and antioxidant compounds between UV-A treatments and control in two cultivars. On the other hand, FUV-B treatment increased significantly the contents of UV absorbing compounds, -carotene, lutein, total phenolic compounds and anthocyanin in caesar green cultivar. It also increased UV absorbing compounds, total phenolic compounds and anthocyanin contents in caesar red cultivar without any growth reduction. UV-B treatment, however, decreased lutein, chlorophyll contents and caused growth reduction and physiological damage such as leaf chlorosis and wrinkle in both cultivars. Overall, the results indicate that supplemental FUV-B treatment, at least in part, may increase antioxidant compounds without any inhibitory effect on shoot growth in romaine lettuce. The results of the current study present a useful practical technique for increasing antioxidant compounds of romaine lettuce production in greenhouse horticulture.
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Claims 8
Claim · model-written summary
UV-A treatment did not change growth parameters or antioxidant compounds of romaine lettuce relative to control in two cultivars.
- Taxon
- Romaine Lettuce
Lactuca sativa var. longifoliat0 - Material
- two romaine lettuce cultivarse0
- Treatment
- UV-Ae1
- Outcome
- growth parameters and antioxidant compoundse1
- Comparator
- controle1
- Setting
- greenhousee6
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Romaine Lettuce”
e0“two romaine lettuce cultivars('Caesar green' and 'Caesar red')”
e1“there were no differences in growth parameters and antioxidant compounds between UV-A treatments and control in two cultivars”
e6“irradiated for 2 hours at nighttime for 11 days under greenhouse”
Claim · model-written summary
FUV-B treatment significantly increased UV absorbing compounds, beta-carotene and lutein in Caesar green.
- Taxon
- Romaine LettuceLactuca sativa var. longifoliat0
- Material
- caesar greene2
- Treatment
- FUV-B treatmente2
- Outcome
- UV absorbing compounds, -carotene, luteine2
- Direction
- increasede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Romaine Lettuce”
e0“two romaine lettuce cultivars('Caesar green' and 'Caesar red')”
e2“FUV-B treatment increased significantly the contents of UV absorbing compounds, -carotene, lutein, total phenolic compounds and anthocyanin in caesar green cultivar”
Claim · model-written summary
FUV-B treatment significantly increased total phenolic compounds and anthocyanin in Caesar green.
- Taxon
- Romaine LettuceLactuca sativa var. longifoliat0
- Material
- caesar greene2
- Treatment
- FUV-B treatmente2
- Outcome
- total phenolic compounds and anthocyanine2
- Direction
- increasede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Romaine Lettuce”
e0“two romaine lettuce cultivars('Caesar green' and 'Caesar red')”
e2“FUV-B treatment increased significantly the contents of UV absorbing compounds, -carotene, lutein, total phenolic compounds and anthocyanin in caesar green cultivar”
Claim · model-written summary
FUV-B treatment increased UV absorbing compounds, total phenolic compounds and anthocyanin in Caesar red without any growth reduction.
- Taxon
- Romaine LettuceLactuca sativa var. longifoliat0
- Material
- caesar rede3
- Treatment
- FUV-Be2
- Outcome
- UV absorbing compounds, total phenolic compounds and anthocyanin contentse3
- Direction
- increasede3
- Qualifier
- without any growth reductione3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Romaine Lettuce”
e2“FUV-B treatment increased significantly the contents of UV absorbing compounds, -carotene, lutein, total phenolic compounds and anthocyanin in caesar green cultivar”
e3“It also increased UV absorbing compounds, total phenolic compounds and anthocyanin contents in caesar red cultivar without any growth reduction”
Claim · model-written summary
UV-B treatment decreased lutein and chlorophyll contents of romaine lettuce in both cultivars.
- Taxon
- Romaine LettuceLactuca sativa var. longifoliat0
- Material
- both cultivarse4
- Treatment
- UV-B treatmente4
- Outcome
- lutein, chlorophyll contentse4
- Direction
- decreasede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Romaine Lettuce”
e4“UV-B treatment, however, decreased lutein, chlorophyll contents and caused growth reduction and physiological damage such as leaf chlorosis and wrinkle in both cultivars”
Claim · model-written summary
UV-B treatment caused growth reduction of romaine lettuce in both cultivars.
- Taxon
- Romaine LettuceLactuca sativa var. longifoliat0
- Material
- both cultivarse4
- Treatment
- UV-B treatmente4
- Outcome
- growthe4
- Direction
- reductione4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Romaine Lettuce”
e4“UV-B treatment, however, decreased lutein, chlorophyll contents and caused growth reduction and physiological damage such as leaf chlorosis and wrinkle in both cultivars”
Claim · model-written summary
UV-B treatment caused physiological damage such as leaf chlorosis and wrinkle in romaine lettuce in both cultivars.
- Taxon
- Romaine LettuceLactuca sativa var. longifoliat0
- Material
- both cultivarse4
- Treatment
- UV-B treatmente4
- Outcome
- physiological damage such as leaf chlorosis and wrinklee4
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Romaine Lettuce”
e4“UV-B treatment, however, decreased lutein, chlorophyll contents and caused growth reduction and physiological damage such as leaf chlorosis and wrinkle in both cultivars”
Claim · model-written summary
Supplemental FUV-B is a useful practical technique for increasing antioxidant compounds of greenhouse romaine lettuce production.
- Taxon
- Romaine LettuceLactuca sativa var. longifoliat0
- Outcome
- a useful practical technique for increasing antioxidant compoundse5
- Setting
- greenhouse horticulturee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Romaine Lettuce”
e5“a useful practical technique for increasing antioxidant compounds of romaine lettuce production in greenhouse horticulture”
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See all 12 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.