Abstract
The present study aimed to assess the response of 15 rice cultivars exposed to elevated ozone stress. The plants were exposed to 100 ppb ozone (10:00– 17:00 h) for 30 days at the reproductive stage. Elevated ozone significantly alters the physiological, biochemical, growth and yield traits of all test rice cultivars. Elevated ozone exposure significantly decreased photosynthetic rate maximally in MDU5 (42.90%) and TRY(R)2 showed maximum reduction in stomatal conductance (42.39%) and chlorophyll content (41.22%). In terms of yield traits, a decrease in tiller number, number of effective tillers, number of filled spikelets per panicle and 1000 grain weight over the control were also observed. The multivariate analysis with a total variance of 58.86% categorized the 15 rice cultivars into ozone sensitive (TRY(R) 2, ASD16, ADT(R)45 and MDU5), moderately ozone sensitive (ASD18, ADT43, Rice MDU6, ADT36 and ADT37), moderately ozone tolerant (ADT(R)48 CO47 and Rice CO51) and ozone tolerant (Rice TPS5, Anna(R)4 and PMK(R)3) under 100 ppb ozone. The present results revealed that the ozone tolerant rice cultivars would be recommended to cultivate in the regions experiencing high ozone concentration.
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Claims 7
Claim · model-written summary
Ozone reduced MDU5 photosynthetic rate by 42.90%.
- Taxon
- rice
Oryza sativae1 - Material
- MDU5e0
- Treatment
- Elevated ozone exposuree0
- Outcome
- photosynthetic ratee0
- Direction
- decreasede0
- Value
- 42.90%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Elevated ozone exposure significantly decreased photosynthetic rate maximally in MDU5 (42.90%)”
e1“The present study aimed to assess the response of 15 rice cultivars”
Claim · model-written summary
Ozone reduced TRY(R)2 stomatal conductance by 42.39%.
- Taxon
- riceOryza sativae2
- Material
- TRY(R)2e0
- Treatment
- Elevated ozone exposuree1
- Outcome
- stomatal conductancee0
- Direction
- reductione0
- Value
- 42.39%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“TRY(R)2 showed maximum reduction in stomatal conductance (42.39%)”
e1“Elevated ozone exposure”
e2“15 rice cultivars exposed to elevated ozone stress”
Claim · model-written summary
Ozone reduced TRY(R)2 chlorophyll content by 41.22%.
- Taxon
- riceOryza sativae2
- Material
- TRY(R)2e0
- Treatment
- Elevated ozone exposuree1
- Outcome
- chlorophyll contente0
- Direction
- reductione0
- Value
- 41.22%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“TRY(R)2 showed maximum reduction in stomatal conductance (42.39%) and chlorophyll content (41.22%)”
e1“Elevated ozone exposure”
e2“15 rice cultivars exposed to elevated ozone stress”
Claim · model-written summary
Ozone decreased tiller number, effective tillers and filled spikelets.
- Taxon
- riceOryza sativae2
- Treatment
- Elevated ozone exposuree1
- Outcome
- tiller number, number of effective tillers, number of filled spikelets per paniclee0
- Direction
- decreasee0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a decrease in tiller number, number of effective tillers, number of filled spikelets per panicle and 1000 grain weight over the control”
e1“Elevated ozone exposure”
e2“15 rice cultivars exposed to elevated ozone stress”
Claim · model-written summary
Ozone decreased 1000 grain weight.
- Taxon
- riceOryza sativae2
- Treatment
- Elevated ozone exposuree1
- Outcome
- 1000 grain weighte0
- Direction
- decreasee0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a decrease in tiller number, number of effective tillers, number of filled spikelets per panicle and 1000 grain weight over the control”
e1“Elevated ozone exposure”
e2“15 rice cultivars exposed to elevated ozone stress”
Claim · model-written summary
Multivariate analysis classified the cultivars into four ozone response groups.
- Taxon
- riceOryza sativae0
- Outcome
- categorized the 15 rice cultivarse0
- Value
- 58.86%e0
- Qualifier
- ozone sensitivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“multivariate analysis with a total variance of 58.86% categorized the 15 rice cultivars into ozone sensitive”
e1“moderately ozone sensitive (ASD18”
e2“moderately ozone tolerant (ADT(R)48”
e3“ozone tolerant (Rice TPS5”
Claim · model-written summary
The authors recommended ozone tolerant cultivars for regions with high ozone.
- Taxon
- riceOryza sativae0
- Outcome
- cultivate in the regions experiencing high ozone concentratione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ozone tolerant rice cultivars would be recommended to cultivate in the regions experiencing high ozone concentration”
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