Abstract
A study was carried out to evaluate the effect of elevated tropospheric ozone concentration on 15 rice cultivars. The cultivars were exposed to a weighted average ozone concentration of 51 ppb ±10% (10:00–17:00 h) for 30 days on its reproductive stage. On an average, elevated ozone significantly affects photosynthetic rate (−19.23%), stomatal conductance (−21.35%) and the contents of chlorophyll (−27.19%), malondialdehyde (+121.43%), proline (+98.38%), and ascorbic acid (−20.99%) over the control. Linear multiregression 3D model significantly fits the leaf traits related to leaf injury percentage which in turn affects all photosynthetic traits. The maximum R2 = 0.85*** was observed between photosynthetic rate, chlorophyll content, and leaf injury percentage. Rice cultivars exhibited significant interspecies variation in physiological and biochemical traits under elevated ozone. Among the tested rice cultivars, the multivariate analysis confirmed the Rice CO51, Anna(R)4, CO47, PMK(R)3, and Rice TPS5 were ozone tolerant. For the first time in South India, the study on response of rice cultivars to elevated ozone was done, which might support the rice breeders for selecting suitable donor parents for future climate change scenarios.
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Claims 9
Claim · model-written summary
Elevated ozone changed photosynthetic rate by −19.23%.
- Taxon
- Rice Cultivars
Oryza sativat0 - Treatment
- elevated ozonee0
- Outcome
- photosynthetic ratee0
- Direction
- −19.23%e0
- Value
- −19.23%e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“elevated ozone significantly affects photosynthetic rate (−19.23%), stomatal conductance (−21.35%) and the contents of chlorophyll (−27.19%), malondialdehyde (+121.43%), proline (+98.38%), and ascorbic acid (−20.99%) over the control”
t0“Rice Cultivars (Oryza Sativa L.)”
Claim · model-written summary
Elevated ozone changed stomatal conductance by −21.35%.
- Taxon
- Rice CultivarsOryza sativat0
- Treatment
- elevated ozonee0
- Outcome
- stomatal conductancee0
- Direction
- −21.35%e0
- Value
- −21.35%e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“elevated ozone significantly affects photosynthetic rate (−19.23%), stomatal conductance (−21.35%) and the contents of chlorophyll (−27.19%), malondialdehyde (+121.43%), proline (+98.38%), and ascorbic acid (−20.99%) over the control”
t0“Rice Cultivars (Oryza Sativa L.)”
Claim · model-written summary
Elevated ozone changed chlorophyll by −27.19%.
- Taxon
- Rice CultivarsOryza sativat0
- Treatment
- elevated ozonee0
- Outcome
- chlorophylle0
- Direction
- −27.19%e0
- Value
- −27.19%e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“elevated ozone significantly affects photosynthetic rate (−19.23%), stomatal conductance (−21.35%) and the contents of chlorophyll (−27.19%), malondialdehyde (+121.43%), proline (+98.38%), and ascorbic acid (−20.99%) over the control”
t0“Rice Cultivars (Oryza Sativa L.)”
Claim · model-written summary
Elevated ozone changed malondialdehyde by +121.43%.
- Taxon
- Rice CultivarsOryza sativat0
- Treatment
- elevated ozonee0
- Outcome
- malondialdehydee0
- Direction
- +121.43%e0
- Value
- +121.43%e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“elevated ozone significantly affects photosynthetic rate (−19.23%), stomatal conductance (−21.35%) and the contents of chlorophyll (−27.19%), malondialdehyde (+121.43%), proline (+98.38%), and ascorbic acid (−20.99%) over the control”
t0“Rice Cultivars (Oryza Sativa L.)”
Claim · model-written summary
Elevated ozone changed proline by +98.38%.
- Taxon
- Rice CultivarsOryza sativat0
- Treatment
- elevated ozonee0
- Outcome
- prolinee0
- Direction
- +98.38%e0
- Value
- +98.38%e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“elevated ozone significantly affects photosynthetic rate (−19.23%), stomatal conductance (−21.35%) and the contents of chlorophyll (−27.19%), malondialdehyde (+121.43%), proline (+98.38%), and ascorbic acid (−20.99%) over the control”
t0“Rice Cultivars (Oryza Sativa L.)”
Claim · model-written summary
Elevated ozone changed ascorbic acid by −20.99%.
- Taxon
- Rice CultivarsOryza sativat0
- Treatment
- elevated ozonee0
- Outcome
- ascorbic acide0
- Direction
- −20.99%e0
- Value
- −20.99%e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“elevated ozone significantly affects photosynthetic rate (−19.23%), stomatal conductance (−21.35%) and the contents of chlorophyll (−27.19%), malondialdehyde (+121.43%), proline (+98.38%), and ascorbic acid (−20.99%) over the control”
t0“Rice Cultivars (Oryza Sativa L.)”
Claim · model-written summary
A regression model fit the relationship between leaf traits and injury, with maximum R2 of 0.85.
- Taxon
- Rice CultivarsOryza sativat0
- Outcome
- photosynthetic rate, chlorophyll content, and leaf injury percentagee0
- Value
- R2 = 0.85***e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The maximum R2 = 0.85*** was observed between photosynthetic rate, chlorophyll content, and leaf injury percentage”
t0“Rice Cultivars”
Claim · model-written summary
Rice cultivars differed significantly in physiological and biochemical traits under elevated ozone.
- Taxon
- Rice cultivarsOryza sativae0
- Outcome
- physiological and biochemical traitse0
- Qualifier
- under elevated ozonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rice cultivars exhibited significant interspecies variation in physiological and biochemical traits under elevated ozone”
Claim · model-written summary
Five tested rice cultivars were classified as ozone tolerant.
- Taxon
- Rice CultivarsOryza sativat0
- Material
- Rice CO51, Anna(R)4, CO47, PMK(R)3, and Rice TPS5e0
- Outcome
- ozone tolerante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rice CO51, Anna(R)4, CO47, PMK(R)3, and Rice TPS5 were ozone tolerant”
t0“Rice Cultivars”
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