Abstract
To clarify the effects of ozone (O3) on the resistance of Japonica rice (Oryza sativa L.) to root lodging, the Japanese major rice cultivar Koshihikari was exposed to four levels of O3 in open-top chambers (mean O3 concentration: 17.3, 32.4, 51.1, and 66.3 nl l-1). We evaluated the resistance to root lodging by measuring pushing resistance at 15 days after heading (DAH) and the dry masses of plant organs such as roots at harvest (35 DAH). Exposure to O3 significantly reduced pushing resistance per panicle, suggesting that the O3 reduced resistance to root lodging. Because the degree of O3-induced reduction in pushing resistance per panicle correlated with that of O3-induced reduction in root dry mass per panicle, the O3-induced reduction in the resistance to root lodging could be caused by O3-induced reduction in root development. There was a significant negative correlation between relative value of pushing resistance per panicle and O3 concentration or dose, indicating that resistance to root lodging decreases with increasing O3 concentration. In East Asia, because the O3 concentration is projected to increase in the near future, lodging issues in the rice cultivation could become serious.
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Claims 5
Claim · model-written summary
Ozone exposure significantly reduced pushing resistance per panicle in Japonica rice cv. Koshihikari.
- Taxon
- Japonica rice
_by_Augustus_Binu.jpg?width=60)
Oryza sativa Japonica Groupt0 - Material
- Koshihikarit1
- Treatment
- O3e1
- Outcome
- pushing resistance per paniclee1
- Direction
- reducede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_by_Augustus_Binu.jpg?width=500)
Verbatim
t0“Tropospheric ozone reduces resistance of Japonica rice”
t1“cv. Koshihikari”
e1“Exposure to O3 significantly reduced pushing resistance per panicle”
Claim · model-written summary
Degree of ozone-induced reduction in pushing resistance per panicle correlated with the reduction in root dry mass per panicle.
- Taxon
- Japonica riceOryza sativa Japonica Groupt0
- Organ / stage
- roote2
- Outcome
- pushing resistance per paniclee2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tropospheric ozone reduces resistance of Japonica rice”
e2“Because the degree of O3-induced reduction in pushing resistance per panicle correlated with that of O3-induced reduction in root dry mass per panicle”
Claim · model-written summary
Ozone-induced reduction in root development could cause the ozone-induced reduction in resistance to root lodging.
- Taxon
- Japonica riceOryza sativa Japonica Groupt0
- Outcome
- resistance to root lodginge3
- Qualifier
- O3-induced reduction in root developmente3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tropospheric ozone reduces resistance of Japonica rice”
e3“the O3-induced reduction in the resistance to root lodging could be caused by O3-induced reduction in root development”
Claim · model-written summary
Relative pushing resistance per panicle showed a significant negative correlation with ozone concentration or dose.
- Taxon
- Japonica riceOryza sativa Japonica Groupt0
- Treatment
- O3 concentration or dosee4
- Outcome
- relative value of pushing resistance per paniclee4
- Direction
- negativee4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tropospheric ozone reduces resistance of Japonica rice”
e4“There was a significant negative correlation between relative value of pushing resistance per panicle and O3 concentration or dose, indicating that resistance to root lodging decreases with increasing O3 concentration”
Claim · model-written summary
Lodging issues in rice cultivation could become serious as ozone concentration is projected to increase in East Asia.
- Taxon
- rice
Oryza sativae5 - Outcome
- lodging issuese5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“In East Asia, because the O3 concentration is projected to increase in the near future, lodging issues in the rice cultivation could become serious”
The same questions in other papers
ozone · disease · Oryza sativa (rice)Results agree
4 papers in the same direction as this paper
- negative
- negative
- negative
1 paper more in this group
See all 5 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.