Abstract
Abstract Soybean plants were subjected to ozone (O 3 ) and water stress to determine whether the two stresses interact to alter growth. Potted soybean ( Glycine max [L.] Merrill cv. Hodgson) plants were exposed to O 3 for 6.8 h daily in four controlled environment chambers. The air supply to the chambers was filtered, and constant amounts of O 3 were added: 0.01, 0.05, 0.09, or 0.13 µ L L −1 . Within each O 3 treatment, half of the plants were watered daily and half had water withheld 2 or 3 d per week. At 2‐week intervals plants were harvested and divided into leaves, stems, and roots. Exposure to increasing concentrations of O 3 resulted in a linear decline in growth, but did not influence the allocation of biomass to roots, stems, and leaves. Ozone also delayed the onset of flowering. Weekly water stress periods of 2 or 3 d duration significantly inhibited the growth of soybean but did not alter the allocation of biomass or delay the onset of flowering. Water stress acted to close stomates and reduce the effective O 3 dose which resulted in a reduced percent reduction in growth that could be attributed to O 3 stress.
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Claims 8
Claim · model-written summary
Increasing ozone caused a linear decline in soybean growth.
- Taxon
- Soybean
Glycine maxt0 - Treatment
- increasing concentrations of O 3e0
- Outcome
- growthe0
- Direction
- declinee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“Exposure to increasing concentrations of O 3 resulted in a linear decline in growth”
Claim · model-written summary
Increasing ozone did not change soybean biomass allocation among roots, stems, and leaves.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- increasing concentrations of O 3e0
- Outcome
- allocation of biomass to roots, stems, and leavese0
- Direction
- did not influencee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“Exposure to increasing concentrations of O 3 resulted in a linear decline in growth, but did not influence the allocation of biomass to roots, stems, and leaves”
Claim · model-written summary
Ozone delayed the onset of soybean flowering.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- Ozonee0
- Outcome
- onset of floweringe0
- Direction
- delayede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“Ozone also delayed the onset of flowering”
Claim · model-written summary
Weekly water stress for 2 or 3 days significantly inhibited soybean growth.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- Weekly water stress periods of 2 or 3 d duratione0
- Outcome
- growth of soybeane0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“Weekly water stress periods of 2 or 3 d duration significantly inhibited the growth of soybean”
Claim · model-written summary
Weekly water stress did not alter soybean biomass allocation.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- Water stresse0
- Outcome
- allocation of biomasse1
- Direction
- did not altere1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“Water stress acted to close stomates”
e1“did not alter the allocation of biomass”
Claim · model-written summary
Weekly water stress did not delay soybean flowering.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- Water stresse0
- Outcome
- onset of floweringe1
- Direction
- did not alter the allocation of biomass or delaye1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“Water stress acted to close stomates”
e1“did not alter the allocation of biomass or delay the onset of flowering”
Claim · model-written summary
Water stress closed soybean stomates and reduced effective ozone dose.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- Water stresse0
- Outcome
- effective O 3 dosee0
- Direction
- reducee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“Water stress acted to close stomates and reduce the effective O 3 dose”
Claim · model-written summary
Water stress reduced the percentage growth reduction attributable to ozone.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- Water stresse0
- Outcome
- percent reduction in growth that could be attributed to O 3 stresse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“Water stress acted to close stomates and reduce the effective O 3 dose which resulted in a reduced percent reduction in growth that could be attributed to O 3 stress”
The same questions in other papers
ozone · growth · Glycine max (soybean)Results differ
22 papers in the same direction as this paper · 3 in the opposite direction
- positive
- positive
- positive
22 papers more in this group
See all 26 papers →drought · growth · Glycine max (soybean)Positive and negative results
40 papers in the same direction as this paper · 170 in the opposite direction
- negative
- negative
- no effect
207 papers more in this group
See all 211 papers →drought · phenology · Glycine max (soybean)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.