Abstract
Abstract— We examined the effects of a light environment during culture of rice plants ( Oryza sativa ) on the steady‐state cyclobutyl pyrimidine dimer (CPD) level, CPD induction by challenge UVB exposure and the ability to photorepair CPD. The steady‐state CPD level in plants grown under visible radiation with supplemental UVB radiation in a growth chamber was several times higher than in plants grown without supplemental UVB radiation, whereas in outdoor‐grown plants, it was not enhanced by supplemental UVB radiation. The susceptibility to CPD induction by challenge UVB exposure was highest in dark‐grown plants and decreased with increasing irradiance of visible radiation at low and high levels and outdoors. Chronic UVB radiation reduced the susceptibility to UV‐induced CPD in plants grown both indoors and outdoors. There was a significant negative correlation between CPD levels induced by challenge UVB exposure and the content of UV‐absorbing compounds. The UV‐induced CPD could be reduced by subsequent blue radiation in all samples except in dark‐grown seedlings. The higher the irradiance of visible radiation in the culture, the greater the ability to photorepair CPD. Chronic UVB radiation did not increase the ability to photorepair CPD.
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Claims 9
Claim · model-written summary
Steady-state CPD level was several times higher in rice plants grown with supplemental UVB in a growth chamber than without it.
- Taxon
- rice plants
Oryza sativae0 - Treatment
- supplemental UVB radiatione1
- Outcome
- CPD levele1
- Direction
- highere1
- Value
- several timese1
- Comparator
- plants grown without supplemental UVB radiatione1
- Setting
- growth chambere1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The steady‐state CPD level in plants grown under visible radiation with supplemental UVB radiation in a growth chamber was several times higher than in plants grown without supplemental UVB radiation”
e0“culture of rice plants ( Oryza sativa )”
Claim · model-written summary
Supplemental UVB did not enhance steady-state CPD level in outdoor-grown rice plants.
- Taxon
- rice plantsOryza sativae0
- Treatment
- supplemental UVB radiatione2
- Outcome
- CPD levele1
- Direction
- not enhancede2
- Setting
- outdoore2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“whereas in outdoor‐grown plants, it was not enhanced by supplemental UVB radiation”
e1“The steady‐state CPD level in plants grown under visible radiation with supplemental UVB radiation in a growth chamber was several times higher than in plants grown without supplemental UVB radiation”
e0“culture of rice plants ( Oryza sativa )”
Claim · model-written summary
Susceptibility to CPD induction was highest in dark-grown rice plants.
- Taxon
- rice plantsOryza sativae0
- Treatment
- dark‐grown plantse3
- Outcome
- susceptibility to CPD inductione3
- Direction
- higheste3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“The susceptibility to CPD induction by challenge UVB exposure was highest in dark‐grown plants and decreased with increasing irradiance of visible radiation at low and high levels and outdoors”
e0“culture of rice plants ( Oryza sativa )”
Claim · model-written summary
Susceptibility to CPD induction decreased with increasing irradiance of visible radiation.
- Taxon
- rice plantsOryza sativae0
- Treatment
- increasing irradiance of visible radiatione3
- Outcome
- susceptibility to CPD inductione3
- Direction
- decreasede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“The susceptibility to CPD induction by challenge UVB exposure was highest in dark‐grown plants and decreased with increasing irradiance of visible radiation at low and high levels and outdoors”
e0“culture of rice plants ( Oryza sativa )”
Claim · model-written summary
Chronic UVB reduced susceptibility to UV-induced CPD in rice plants grown indoors and outdoors.
- Taxon
- rice plantsOryza sativae0
- Treatment
- Chronic UVB radiatione4
- Outcome
- susceptibility to UV‐induced CPDe4
- Direction
- reducede4
- Setting
- indoors and outdoorse4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Chronic UVB radiation reduced the susceptibility to UV‐induced CPD in plants grown both indoors and outdoors”
e0“culture of rice plants ( Oryza sativa )”
Claim · model-written summary
CPD levels induced by challenge UVB were negatively correlated with the content of UV-absorbing compounds.
- Taxon
- rice plantsOryza sativae0
- Compound
- UV‐absorbing compoundse5
- Outcome
- CPD levelse5
- Direction
- negativee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“There was a significant negative correlation between CPD levels induced by challenge UVB exposure and the content of UV‐absorbing compounds”
e0“culture of rice plants ( Oryza sativa )”
Claim · model-written summary
Subsequent blue radiation reduced UV-induced CPD in all samples except dark-grown seedlings.
- Taxon
- rice plantsOryza sativae0
- Treatment
- subsequent blue radiatione6
- Outcome
- UV‐induced CPDe6
- Direction
- reducede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“The UV‐induced CPD could be reduced by subsequent blue radiation in all samples except in dark‐grown seedlings”
e0“culture of rice plants ( Oryza sativa )”
Claim · model-written summary
A higher irradiance of visible radiation during culture increased the ability to photorepair CPD.
- Taxon
- rice plantsOryza sativae0
- Treatment
- irradiance of visible radiatione7
- Outcome
- ability to photorepair CPDe7
- Direction
- greatere7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“The higher the irradiance of visible radiation in the culture, the greater the ability to photorepair CPD”
e0“culture of rice plants ( Oryza sativa )”
Claim · model-written summary
Chronic UVB did not increase the ability to photorepair CPD.
- Taxon
- rice plantsOryza sativae0
- Treatment
- Chronic UVB radiatione7
- Outcome
- ability to photorepair CPDe7
- Direction
- did not increasee7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“The higher the irradiance of visible radiation in the culture, the greater the ability to photorepair CPD. Chronic UVB radiation did not increase the ability to photorepair CPD”
e0“culture of rice plants ( Oryza sativa )”
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See all 26 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.