Abstract
Patterns of carbon allocation and mycorrhizal colonization were examined in loblolly pine seedlings from two half-sib families exposed to three ozone treatments (charcoal-filtered air, ambient air + 80 ppb O{sub 3}, and ambient air + 160 ppb O{sub 3}) and three rain pH levels (5.2, 4.5, and 3.3) for 12 weeks in open-topped chambers in a field setting. No statistically significant effects of ozone or rain pH were detected on biomass, root:shoot ratios, or carbon allocation; some consistent patterns were observed, however. Coarse root starch concentrations and mycorrhizal infection varied significantly with ozone levels. No significant interactions of ozone, rain pH, or genotype were detected.
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Claims 5
Claim · model-written summary
Ozone had no statistically significant effect on biomass, root to shoot ratio or carbon allocation.
- Taxon
- Pinus taeda L.
Pinus taedat0 - Treatment
- ozonee0
- Outcome
- biomass, root:shoot ratios, or carbon allocatione0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pinus taeda L.”
e0“No statistically significant effects of ozone or rain pH were detected on biomass, root:shoot ratios, or carbon allocation”
Claim · model-written summary
Rain pH had no statistically significant effect on biomass, root to shoot ratio or carbon allocation.
- Taxon
- Pinus taeda L.Pinus taedat0
- Treatment
- rain pHe0
- Outcome
- biomass, root:shoot ratios, or carbon allocatione0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pinus taeda L.”
e0“No statistically significant effects of ozone or rain pH were detected on biomass, root:shoot ratios, or carbon allocation”
Claim · model-written summary
Coarse root starch concentration varied significantly across ozone levels.
- Taxon
- Pinus taeda L.Pinus taedat0
- Organ / stage
- Coarse roote0
- Treatment
- ozone levelse0
- Outcome
- starch concentrationse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pinus taeda L.”
e0“Coarse root starch concentrations and mycorrhizal infection varied significantly with ozone levels”
Claim · model-written summary
Mycorrhizal infection varied significantly across ozone levels.
- Taxon
- Pinus taeda L.Pinus taedat0
- Treatment
- ozone levelse0
- Outcome
- mycorrhizal infectione0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pinus taeda L.”
e0“Coarse root starch concentrations and mycorrhizal infection varied significantly with ozone levels”
Claim · model-written summary
No significant interactions of ozone, rain pH or genotype were detected.
- Taxon
- Pinus taeda L.Pinus taedat0
- Outcome
- interactions of ozone, rain pH, or genotypee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pinus taeda L.”
e0“No significant interactions of ozone, rain pH, or genotype were detected”
The same questions in other papers
ozone · growth · Pinus taeda (loblolly pine)Results differ
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2 papers in the same direction as this paper · 1 in the opposite direction
- positive
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rainfall · growth · Pinus taeda (loblolly pine)Positive and negative results
5 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- no effect
4 papers more in this group
See all 8 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.