Abstract
Ultraviolet (UV)-B radiation is considered one of the major detrimental rays coming from the Sun. UV-B radiation has a harmful impact on plant growth and development. The effect of UV-B radiation was studied on 64 rice ( Oryza sativa L.) genotypes during the vegetative season. An equal number of genotypes from the japonica (50%) and indica (50%) subspecies were phenotyped using the Soil-Plant-Atmosphere-Research (SPAR) units. The 10 kJ UV-B was imposed 12 days after planting (DAP) and continued for three weeks (21 d). Based on the combined ultraviolet-B radiation response index (CUVBRI) for each genotype, the 64 rice genotypes were classified into sensitive, moderately sensitive, moderately tolerant, and tolerant. Various shoot traits, such as plant height, tiller, and leaf numbers, were measured. We also studied critical root phenological traits like root volume, diameter, tips, and forks. Out of all the studied shoot traits, leaf area showed maximum reduction for both indica (54%) and japonica (48%). Among the root traits, root length decreased by negligible (1%) for indica as compared to japonica (5%), while root crossing and forks showed a maximum decline for japonica (37 and 42%), respectively. This study is timely, meaningful, and required because it will help breeders select a tolerant or sensitive rice line for better yield and production under abiotic stresses.
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Claims 7
Claim · model-written summary
The response index classified 64 rice genotypes into four UV-B tolerance groups.
- Taxon
- rice
Oryza sativae0 - Outcome
- classified into sensitive, moderately sensitive, moderately tolerant, and tolerante0
- Value
- 64e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the 64 rice genotypes were classified into sensitive, moderately sensitive, moderately tolerant, and tolerant.”
Claim · model-written summary
UV-B reduced leaf area in indica rice by 54%.
- Taxon
- riceOryza sativat0
- Material
- indicae0
- Treatment
- ultraviolet-B radiationt0
- Outcome
- leaf areae0
- Direction
- reductione0
- Value
- 54%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leaf area showed maximum reduction for both indica (54%) and japonica (48%).”
t0“ultraviolet-B radiation on early-season morpho-physiological traits of indica and japonica rice genotypes”
Claim · model-written summary
UV-B reduced leaf area in japonica rice by 48%.
- Taxon
- riceOryza sativat0
- Material
- japonicae0
- Treatment
- ultraviolet-B radiationt0
- Outcome
- leaf areae0
- Direction
- reductione0
- Value
- 48%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leaf area showed maximum reduction for both indica (54%) and japonica (48%).”
t0“ultraviolet-B radiation on early-season morpho-physiological traits of indica and japonica rice genotypes”
Claim · model-written summary
UV-B decreased root length in indica rice by 1%.
- Taxon
- riceOryza sativat0
- Material
- indicae0
- Treatment
- ultraviolet-B radiationt0
- Outcome
- root lengthe0
- Direction
- decreasede0
- Value
- 1%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“root length decreased by negligible (1%) for indica as compared to japonica (5%)”
t0“ultraviolet-B radiation on early-season morpho-physiological traits of indica and japonica rice genotypes”
Claim · model-written summary
UV-B decreased root length in japonica rice by 5%.
- Taxon
- riceOryza sativat0
- Material
- japonicae0
- Treatment
- ultraviolet-B radiationt0
- Outcome
- root lengthe0
- Direction
- decreasede0
- Value
- 5%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“root length decreased by negligible (1%) for indica as compared to japonica (5%)”
t0“ultraviolet-B radiation on early-season morpho-physiological traits of indica and japonica rice genotypes”
Claim · model-written summary
UV-B caused a maximum decline in japonica root crossing.
- Taxon
- riceOryza sativat0
- Material
- japonicae0
- Treatment
- ultraviolet-B radiationt0
- Outcome
- root crossinge0
- Direction
- declinee0
- Value
- 37e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“root crossing and forks showed a maximum decline for japonica (37 and 42%), respectively.”
t0“ultraviolet-B radiation on early-season morpho-physiological traits of indica and japonica rice genotypes”
Claim · model-written summary
UV-B caused a maximum decline in japonica forks.
- Taxon
- riceOryza sativat0
- Material
- japonicae0
- Treatment
- ultraviolet-B radiationt0
- Outcome
- forkse0
- Direction
- declinee0
- Value
- 42%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“root crossing and forks showed a maximum decline for japonica (37 and 42%), respectively.”
t0“ultraviolet-B radiation on early-season morpho-physiological traits of indica and japonica rice genotypes”
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