Abstract
Cultivar 1 resistant to O/sub 3/, and cv 2 susceptible, were compared in greenhouses with 3 weekly treatments at high temps and high O/sub 3/, and in a screenhouse under ambient conditions. Greenhouse sunlight was about 60% of outdoors. At age 7 weeks greenhouse plants showed little injury at high or low relative humidity (RH) and high or low leaf conductances. At 8 weeks with moderate RH and medium or low conductances, little acute injury occurred but cv 2 showed mottling. At 9 weeks with conditions as at 8 weeks, cv 2 had acute injury; cv 1 had almost none. Screenhouse plants with lower light than full sun showed no injury at these periods, but when moved to full sun at 9 weeks cv 2 (only) was injured. Smaller root systems and slower depletion of soil moisture in cv 2 suggest that injury could depend upon leaf water-stress levels in addition to O/sub 3/, plant age, light, and temperature. RH and leaf conductances were not shown to be related to injury.
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Claims 9
Claim · model-written summary
At 9 weeks in the greenhouse, cv 2 had acute ozone injury whereas cv 1 had almost none.
- Taxon
- sweet cornt0
- Material
- cv 2e1
- Treatment
- 3 weekly treatments at high temps and high O/sub 3/e0
- Outcome
- acute injurye1
- Comparator
- cv 1e1
- Setting
- greenhousese0
Not reportedDirection
Verbatim
t0“sweet corn”
e0“Cultivar 1 resistant to O/sub 3/, and cv 2 susceptible, were compared in greenhouses with 3 weekly treatments at high temps and high O/sub 3/”
e1“At 9 weeks with conditions as at 8 weeks, cv 2 had acute injury; cv 1 had almost none”
Claim · model-written summary
Cv 2 was injured when moved to full sun at 9 weeks, whereas plants at lower light than full sun showed no injury.
- Taxon
- sweet cornt0
- Material
- cv 2e2
- Treatment
- moved to full sun at 9 weekse2
- Outcome
- injurede2
- Comparator
- lower light than full sune6
- Setting
- screenhousee3
Not reportedDirection
Verbatim
t0“sweet corn”
e2“when moved to full sun at 9 weeks cv 2 (only) was injured”
e6“Screenhouse plants with lower light than full sun showed no injury at these periods”
e3“and in a screenhouse under ambient conditions”
Claim · model-written summary
Cv 2 showed leaf mottling at 8 weeks.
Not reportedDirection
Verbatim
t0“sweet corn”
e3“At 8 weeks with moderate RH and medium or low conductances, little acute injury occurred but cv 2 showed mottling”
Claim · model-written summary
At 8 weeks little acute injury occurred under moderate relative humidity and medium or low leaf conductances.
Not reportedDirection
Verbatim
t0“sweet corn”
e3“At 8 weeks with moderate RH and medium or low conductances, little acute injury occurred but cv 2 showed mottling”
Claim · model-written summary
Cv 2 had smaller root systems and slower depletion of soil moisture.
Verbatim
t0“sweet corn”
e4“Smaller root systems and slower depletion of soil moisture in cv 2 suggest that injury could depend upon leaf water-stress levels”
Claim · model-written summary
Ozone injury in sweet corn could depend on leaf water-stress levels in addition to ozone, plant age, light and temperature.
Verbatim
t0“sweet corn”
e4“Smaller root systems and slower depletion of soil moisture in cv 2 suggest that injury could depend upon leaf water-stress levels”
Claim · model-written summary
Relative humidity and leaf conductances were not shown to be related to ozone injury in sweet corn.
Not reportedDirection
Verbatim
t0“sweet corn”
e5“RH and leaf conductances were not shown to be related to injury”
Claim · model-written summary
Screenhouse plants with lower light than full sun showed no injury.
Not reportedDirection
Verbatim
t0“sweet corn”
e6“Screenhouse plants with lower light than full sun showed no injury at these periods”
e3“and in a screenhouse under ambient conditions”
Claim · model-written summary
At 7 weeks greenhouse plants showed little injury at high or low relative humidity and high or low leaf conductances.
- Taxon
- sweet cornt0
- Treatment
- high or low relative humidity (RH)e7
- Outcome
- little injurye7
- Setting
- greenhouse plantse7
Not reportedDirection
Verbatim
t0“sweet corn”
e7“At age 7 weeks greenhouse plants showed little injury at high or low relative humidity (RH) and high or low leaf conductances”
The same questions in other papers
light · crop injury · Zea mays (maize)Results agree
2 papers in the same direction as this paper
- negative
- 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.