Abstract
Experimental studies were conducted to estimate the possible damage caused to ten rice (Oryza sativa L.) genotypes of Pakistan by tropospheric ozone. The experimental site is located at 31.4504° N and 73.1350° E, at an altitude of 184 m.a.s level with an average annual rainfall of 784 mm. A suitable and agile method was adopted to assess tolerance and susceptibility in rice genotypes at an early growth stage. Genotype Injury response, growth and biochemical parameters were measured to estimate possible effects of ozone, which was subsequently proclaimed as a criterion for ozone tolerance. Rice genotypes were subjected to ozone concentrations of 70 pbb (Current ambient) and 120 pbb (expected in near future) under a polytunnel. The findings indicated that ozone, an atmospheric pollutant, substantially harmed crop growth and metabolism, as well as inflicted a specific type of foliar injury that caused early leaf senescence. Rice genotype IR-9 followed by Punjab-Basmati and Ksk-434 appeared to be the most susceptible, whereas Basmati-515 followed by Basmati 2000 and super-Basmati were found to be Ozone-tolerant. Plant genotypes grown under elevated ozone showed 13.45% and 11.35% reduction in total root and shoot dry weight, and 25.54% and 6.6% decrease in plant leaf area and plant total length respectively compared to the control group. A significant interaction between treatment × chemical components and growth parameters was also found. The Present study confirms a direct relationship between visual response and growth as well as biochemical parameters. Declared results were statistically analyzed by using analysis of variance at confidence level of p < 0.05.
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Claims 9
Claim · model-written summary
Ozone harmed rice growth and metabolism and caused foliar injury and early leaf senescence.
- Taxon
- rice
Oryza sativat0 - Organ / stage
- leafe0
- Treatment
- ozonee0
- Outcome
- crop growth and metabolisme0
- Direction
- harmede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ozone, an atmospheric pollutant, substantially harmed crop growth and metabolism, as well as inflicted a specific type of foliar injury that caused early leaf senescence”
t0“rice (Oryza sativa L.)”
Claim · model-written summary
IR-9, Punjab-Basmati, and Ksk-434 were the most ozone-susceptible rice genotypes.
- Taxon
- RiceOryza sativae0
- Material
- IR-9 followed by Punjab-Basmati and Ksk-434e0
- Outcome
- most susceptiblee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rice genotype IR-9 followed by Punjab-Basmati and Ksk-434 appeared to be the most susceptible”
Claim · model-written summary
Basmati-515, Basmati 2000, and super-Basmati were ozone-tolerant rice genotypes.
- Taxon
- riceOryza sativat0
- Material
- Basmati-515 followed by Basmati 2000 and super-Basmatie0
- Outcome
- Ozone-tolerante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Basmati-515 followed by Basmati 2000 and super-Basmati were found to be Ozone-tolerant”
t0“rice (Oryza sativa L.)”
Claim · model-written summary
Elevated ozone reduced root dry weight by 13.45% versus controls.
- Taxon
- riceOryza sativat0
- Treatment
- elevated ozonee0
- Outcome
- roote0
- Direction
- reductione0
- Value
- 13.45%e0
- Comparator
- control groupe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant genotypes grown under elevated ozone showed 13.45% and 11.35% reduction in total root and shoot dry weight, and 25.54% and 6.6% decrease in plant leaf area and plant total length respectively compared to the control group”
t0“rice (Oryza sativa L.)”
Claim · model-written summary
Elevated ozone reduced shoot dry weight by 11.35% versus controls.
- Taxon
- riceOryza sativat0
- Treatment
- elevated ozonee0
- Outcome
- shoot dry weighte0
- Direction
- reductione0
- Value
- 11.35%e0
- Comparator
- control groupe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant genotypes grown under elevated ozone showed 13.45% and 11.35% reduction in total root and shoot dry weight, and 25.54% and 6.6% decrease in plant leaf area and plant total length respectively compared to the control group”
t0“rice (Oryza sativa L.)”
Claim · model-written summary
Elevated ozone decreased rice leaf area by 25.54% versus controls.
- Taxon
- riceOryza sativat0
- Treatment
- elevated ozonee0
- Outcome
- plant leaf areae0
- Direction
- decreasee0
- Value
- 25.54%e0
- Comparator
- control groupe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant genotypes grown under elevated ozone showed 13.45% and 11.35% reduction in total root and shoot dry weight, and 25.54% and 6.6% decrease in plant leaf area and plant total length respectively compared to the control group”
t0“rice (Oryza sativa L.)”
Claim · model-written summary
Elevated ozone decreased total rice plant length by 6.6% versus controls.
- Taxon
- riceOryza sativat0
- Treatment
- elevated ozonee0
- Outcome
- plant total lengthe0
- Direction
- decreasee0
- Value
- 6.6%e0
- Comparator
- control groupe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant genotypes grown under elevated ozone showed 13.45% and 11.35% reduction in total root and shoot dry weight, and 25.54% and 6.6% decrease in plant leaf area and plant total length respectively compared to the control group”
t0“rice (Oryza sativa L.)”
Claim · model-written summary
Treatment interacted significantly with chemical components and growth parameters in rice.
- Taxon
- riceOryza sativat0
- Treatment
- treatmente0
- Outcome
- chemical components and growth parameterse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A significant interaction between treatment × chemical components and growth parameters was also found”
t0“rice (Oryza sativa L.)”
Claim · model-written summary
Visual response was directly related to growth and biochemical parameters in rice.
- Taxon
- riceOryza sativat0
- Outcome
- growth as well as biochemical parameterse0
- Comparator
- visual responsee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Present study confirms a direct relationship between visual response and growth as well as biochemical parameters”
t0“rice (Oryza sativa L.)”
The same questions in other papers
ozone · growth · Oryza sativa (rice)Results differ
23 papers in the same direction as this paper · 3 in the opposite direction
- negative
- negative
- positive
23 papers more in this group
See all 27 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.