Abstract
Barley and pea plants were grown under several regimens of different compositions of soil atmosphere, the O(2) concentration varying from 0 to 21% and the CO(2) concentration from 0 to 8%. In absence of CO(2), the effect of O(2) on root length in barley was characterized by equal root lengths within the range of 21 to 7% O(2) and a steep decline between 7 and 0%. In peas, while showing the same general response, the decline occurred between 14 and 7% O(2). Root numbers of the seminal roots of barley decreased already with reduction in O(2) concentration from 21 to 14%. Dry matter production was affected somewhat differently by O(2) and CO(2) concentration. Dry matter production in barley was reduced at 14% O(2) while root length decreased between 7 and 0%. In peas, dry matter production was favored by low CO(2) concentrations except where there was no oxygen. At 21% O(2), increasing CO(2) concentrations did not seem to affect root length up to concentrations of 2% CO(2). At 8% CO(2), root length was decreased. The inter-active effects of CO(2) and O(2) are characterized by a reduced susceptibility to CO(2) at O(2) values below 7%, and a very deleterious effect of 8% CO(2) at 7% O(2).
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Claims 9
Claim · model-written summary
Barley root length was stable at 21 to 7% O2 and declined below 7%.
- Taxon
- Barley
.jpg?width=60)
Hordeum vulgaret0 - Treatment
- 7 and 0%e0
- Outcome
- root lengthse0
- Direction
- steep declinee0
- Comparator
- 21 to 7% O(2)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“equal root lengths within the range of 21 to 7% O(2) and a steep decline between 7 and 0%.”
t0“Barley”
Claim · model-written summary
Pea root length declined between 14 and 7% O2.
- Taxon
- peas
Lathyrus oleraceuse0 - Treatment
- 14 and 7% O(2)e0
- Outcome
- declinee0
- Direction
- declinee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In peas, while showing the same general response, the decline occurred between 14 and 7% O(2).”
Claim · model-written summary
Barley seminal root number decreased as O2 fell from 21 to 14%.
- Taxon
- barleyHordeum vulgaree0
- Treatment
- reduction in O(2) concentration from 21 to 14%e0
- Outcome
- Root numbers of the seminal rootse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root numbers of the seminal roots of barley decreased already with reduction in O(2) concentration from 21 to 14%.”
Claim · model-written summary
Barley dry matter production was reduced at 14% O2.
- Taxon
- barleyHordeum vulgaree0
- Treatment
- 14% O(2)e0
- Outcome
- Dry matter productione0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dry matter production in barley was reduced at 14% O(2)”
Claim · model-written summary
Low CO2 favored pea dry matter production except without oxygen.
- Taxon
- peasLathyrus oleraceuse0
- Treatment
- low CO(2) concentrationse0
- Outcome
- dry matter productione0
- Direction
- favorede0
- Qualifier
- except where there was no oxygene0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In peas, dry matter production was favored by low CO(2) concentrations except where there was no oxygen.”
Claim · model-written summary
Increasing CO2 to 2% did not seem to affect root length at 21% O2.
- Taxon
- Barley and PeasLathyrus oleraceusHordeum vulgaret0
- Treatment
- increasing CO(2) concentrationse0
- Outcome
- root lengthe0
- Direction
- did not seem to affecte0
- Qualifier
- 21% O(2)e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At 21% O(2), increasing CO(2) concentrations did not seem to affect root length up to concentrations of 2% CO(2).”
t0“Barley and Peas”
Claim · model-written summary
At 8% CO2, root length decreased.
- Taxon
- Barley and PeasLathyrus oleraceusHordeum vulgaret0
- Treatment
- 8% CO(2)e0
- Outcome
- root lengthe0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At 8% CO(2), root length was decreased.”
t0“Barley and Peas”
Claim · model-written summary
Below 7% O2, CO2 susceptibility was reduced.
- Taxon
- Barley and PeasLathyrus oleraceusHordeum vulgaret0
- Outcome
- susceptibility to CO(2)e0
- Direction
- reducede0
- Setting
- O(2) values below 7%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a reduced susceptibility to CO(2) at O(2) values below 7%”
t0“Barley and Peas”
Claim · model-written summary
At 7% O2, 8% CO2 had a very deleterious effect.
- Taxon
- Barley and PeasLathyrus oleraceusHordeum vulgaret0
- Treatment
- 8% CO(2)e0
- Outcome
- very deleterious effecte0
- Direction
- deleteriouse0
- Qualifier
- 7% O(2)e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a very deleterious effect of 8% CO(2) at 7% O(2).”
t0“Barley and Peas”
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See all 22 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.