Abstract
Two Nicotiana tabacum L. cultivars, ‘North Carolina 88’ and ‘Coker 319′, were grown in a charcoal-filtered greenhouse and treated with three different herbicides according to the herbicide labels. Labeled rates (X) for diphenamid ( N,N -dimethyl-2,2-diphenylacetamide), isopropalin (2,6-dinitro- N,N -dipropylcumidine), and pebulate ( S -propyl butylethylthiocarbamate) were 9.2 kg/ha, 2.3 kg/ha, and 6.2 kg/ha, respectively. Three weeks after treatment with 1/2X, X, or 2X rates of herbicide, half of the plants were fumigated with 15 μl/liter ozone for 2.5 h for four consecutive days. North Carolina 88 and Coker 319 grew equally well and were equally sensitive to ozone injury. Ozone reduced plant height and levels of reducing sugars and total nonstructural carbohydrates of both cultivars. Isopropalin, at X and 2X, reduced the ozone sensitivity and growth of both cultivars, while the X rate of pebulate reduced the ozone sensitivity of North Carolina 88. The chemical composition of the plants was not correlated with the sensitivity of the tobacco plants to ozone-induced injury. The major factors governing fleck intensity, growth, and chemical compositions were ozone and herbicide treatments.
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Claims 6
Claim · model-written summary
North Carolina 88 and Coker 319 grew equally and had equal ozone sensitivity.
- Taxon
- Nicotiana tabacum L.
Nicotiana tabacume1 - Material
- North Carolina 88e0
- Outcome
- grew equally well and were equally sensitive to ozone injurye0
- Comparator
- Coker 319e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“North Carolina 88 and Coker 319 grew equally well and were equally sensitive to ozone injury.”
e1“Nicotiana tabacum L.”
Claim · model-written summary
Ozone reduced plant height, reducing sugars and total nonstructural carbohydrates in both cultivars.
- Taxon
- Nicotiana tabacum L.Nicotiana tabacume1
- Treatment
- Ozonee0
- Outcome
- plant height and levels of reducing sugars and total nonstructural carbohydratese0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ozone reduced plant height and levels of reducing sugars and total nonstructural carbohydrates of both cultivars.”
e1“Nicotiana tabacum L.”
Claim · model-written summary
Isopropalin at X and 2X reduced ozone sensitivity and growth of both cultivars.
- Taxon
- Nicotiana tabacum L.Nicotiana tabacume1
- Treatment
- Isopropalin, at X and 2Xe0
- Outcome
- ozone sensitivity and growthe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Isopropalin, at X and 2X, reduced the ozone sensitivity and growth of both cultivars”
e1“Nicotiana tabacum L.”
Claim · model-written summary
Pebulate at X reduced ozone sensitivity of North Carolina 88.
- Taxon
- Nicotiana tabacum L.Nicotiana tabacume1
- Material
- North Carolina 88e0
- Treatment
- X rate of pebulatee0
- Outcome
- ozone sensitivitye0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the X rate of pebulate reduced the ozone sensitivity of North Carolina 88”
e1“Nicotiana tabacum L.”
Claim · model-written summary
Plant chemical composition was not correlated with ozone injury sensitivity.
- Taxon
- tobaccoNicotiana tabacume0
- Organ / stage
- plantse0
- Outcome
- sensitivity of the tobacco plants to ozone-induced injurye0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The chemical composition of the plants was not correlated with the sensitivity of the tobacco plants to ozone-induced injury.”
Claim · model-written summary
Ozone and herbicide treatments were the main factors governing fleck intensity, growth and chemical composition.
- Taxon
- tobaccoNicotiana tabacume1
- Treatment
- ozone and herbicide treatmentse0
- Outcome
- fleck intensity, growth, and chemical compositionse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The major factors governing fleck intensity, growth, and chemical compositions were ozone and herbicide treatments.”
e1“tobacco plants”
The same questions in other papers
ozone · quality: sugar starch · Nicotiana tabacum (tobacco)Results agree
1 paper in the same direction as this paper
- negative
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.