Abstract
The effects of elevated CO2 on growth, pod, and seed yield, and gas exchange of 'Georgia Red' peanut (Arachis hypogaea L.) were evaluated under controlled environmental conditions. Plants were exposed to concentrations of 400 (ambient), 800, and 1200 micromoles mol-1 CO2 in reach-in growth chambers. Foliage fresh and dry weights increased with increased CO2 up to 800 micromoles mol-1, but declined at 1200 micromoles mol-1. The number and the fresh and dry weights of pods also increased with increasing CO2 concentration. However, the yield of immature pods was not significantly influenced by increased CO2. Total seed yield increased 33% from ambient to 800 micromoles mol-1 CO2, and 4% from 800 to 1200 micromoles mol-1 CO2. Harvest index increased with increasing CO2. Branch length increased while specific leaf area decreased linearly as CO2 increased from ambient to 1200 micromoles mol-1. Net photosynthetic rate was highest among plants grown at 800 micromoles mol-1. Stomatal conductance decreased with increased CO2. Carboxylation efficiency was similar among plants grown at 400 and 800 micromoles mol-1 and decreased at 1200 micromoles mol-1 CO2. These results suggest that CO2 enrichment from 400 to 800 micromoles mol-1 had positive effects on peanut growth and yield, but above 800 micromoles mol-1 enrichment seed yield increased only marginally.
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Claims 13
Claim · model-written summary
Foliage fresh and dry weights of peanut increased with CO2 up to 800 micromoles mol-1.
- Taxon
- peanut
Arachis hypogaeae0 - Material
- Georgia Rede0
- Treatment
- increased CO2e1
- Outcome
- Foliage fresh and dry weightse1
- Direction
- increasede1
- Qualifier
- up to 800 micromoles mol-1e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“'Georgia Red' peanut (Arachis hypogaea L.)”
e1“Foliage fresh and dry weights increased with increased CO2 up to 800 micromoles mol-1”
Claim · model-written summary
Foliage fresh and dry weights of peanut declined at 1200 micromoles mol-1 CO2.
- Taxon
- peanutArachis hypogaeae0
- Material
- Georgia Rede0
- Treatment
- 1200 micromoles mol-1e2
- Outcome
- Foliage fresh and dry weightse2
- Direction
- declinede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“'Georgia Red' peanut (Arachis hypogaea L.)”
e2“Foliage fresh and dry weights increased with increased CO2 up to 800 micromoles mol-1, but declined at 1200 micromoles mol-1”
Claim · model-written summary
The number, fresh weight and dry weight of peanut pods increased with increasing CO2.
- Taxon
- peanutArachis hypogaeae0
- Material
- Georgia Rede0
- Treatment
- increasing CO2e3
- Outcome
- number and the fresh and dry weights of podse3
- Direction
- increasede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“'Georgia Red' peanut (Arachis hypogaea L.)”
e3“The number and the fresh and dry weights of pods also increased with increasing CO2 concentration”
Claim · model-written summary
Yield of immature peanut pods was not significantly influenced by increased CO2.
- Taxon
- peanutArachis hypogaeae0
- Material
- Georgia Rede0
- Treatment
- increased CO2e4
- Outcome
- the yield of immature podse4
- Direction
- no_changeinferrede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“'Georgia Red' peanut (Arachis hypogaea L.)”
e4“the yield of immature pods was not significantly influenced by increased CO2”
Claim · model-written summary
Total seed yield of peanut increased by 33% from ambient to 800 micromoles mol-1 CO2.
- Taxon
- peanutArachis hypogaeae0
- Material
- Georgia Rede0
- Treatment
- 800 micromoles mol-1 CO2e5
- Outcome
- Total seed yielde5
- Direction
- increasede5
- Value
- 33%e5
- Comparator
- ambiente5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“'Georgia Red' peanut (Arachis hypogaea L.)”
e5“Total seed yield increased 33% from ambient to 800 micromoles mol-1 CO2, and 4% from 800 to 1200 micromoles mol-1 CO2”
Claim · model-written summary
Total seed yield of peanut increased by 4% from 800 to 1200 micromoles mol-1 CO2.
- Taxon
- peanutArachis hypogaeae0
- Material
- Georgia Rede0
- Treatment
- 1200 micromoles mol-1 CO2e5
- Outcome
- Total seed yielde5
- Direction
- increasede5
- Value
- 4%e5
- Comparator
- 800 micromoles mol-1 CO2e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“'Georgia Red' peanut (Arachis hypogaea L.)”
e5“Total seed yield increased 33% from ambient to 800 micromoles mol-1 CO2, and 4% from 800 to 1200 micromoles mol-1 CO2”
Claim · model-written summary
Harvest index of peanut increased with increasing CO2.
- Taxon
- peanutArachis hypogaeae0
- Material
- Georgia Rede0
- Treatment
- increasing CO2e6
- Outcome
- Harvest indexe6
- Direction
- increasede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“'Georgia Red' peanut (Arachis hypogaea L.)”
e6“Harvest index increased with increasing CO2”
Claim · model-written summary
Branch length of peanut increased as CO2 rose from ambient to 1200 micromoles mol-1.
- Taxon
- peanutArachis hypogaeae0
- Material
- Georgia Rede0
- Treatment
- 1200 micromoles mol-1e7
- Outcome
- Branch lengthe7
- Direction
- increasede7
- Comparator
- ambiente7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“'Georgia Red' peanut (Arachis hypogaea L.)”
e7“Branch length increased while specific leaf area decreased linearly as CO2 increased from ambient to 1200 micromoles mol-1”
Claim · model-written summary
Specific leaf area of peanut decreased linearly as CO2 rose from ambient to 1200 micromoles mol-1.
- Taxon
- peanutArachis hypogaeae0
- Material
- Georgia Rede0
- Treatment
- 1200 micromoles mol-1e7
- Outcome
- specific leaf areae7
- Direction
- decreased linearlye7
- Comparator
- ambiente7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“'Georgia Red' peanut (Arachis hypogaea L.)”
e7“Branch length increased while specific leaf area decreased linearly as CO2 increased from ambient to 1200 micromoles mol-1”
Claim · model-written summary
Net photosynthetic rate of peanut was highest in plants grown at 800 micromoles mol-1 CO2.
- Taxon
- peanutArachis hypogaeae0
- Material
- Georgia Rede0
- Treatment
- 800 micromoles mol-1e1
- Outcome
- Net photosynthetic ratee1
- Direction
- higheste1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“'Georgia Red' peanut (Arachis hypogaea L.)”
e1“Net photosynthetic rate was highest among plants grown at 800 micromoles mol-1”
Claim · model-written summary
Stomatal conductance of peanut decreased with increased CO2.
- Taxon
- peanutArachis hypogaeae0
- Material
- Georgia Rede0
- Treatment
- increased CO2e1
- Outcome
- Stomatal conductancee1
- Direction
- decreasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“'Georgia Red' peanut (Arachis hypogaea L.)”
e1“Stomatal conductance decreased with increased CO2”
Claim · model-written summary
Carboxylation efficiency of peanut was similar at 400 and 800 micromoles mol-1 CO2.
- Taxon
- peanutArachis hypogaeae0
- Material
- Georgia Rede0
- Treatment
- 400 and 800 micromoles mol-1e1
- Outcome
- Carboxylation efficiencye1
- Direction
- no_changeinferrede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“'Georgia Red' peanut (Arachis hypogaea L.)”
e1“Carboxylation efficiency was similar among plants grown at 400 and 800 micromoles mol-1 and decreased at 1200 micromoles mol-1 CO2”
Claim · model-written summary
Carboxylation efficiency of peanut decreased at 1200 micromoles mol-1 CO2.
- Taxon
- peanutArachis hypogaeae0
- Material
- Georgia Rede0
- Treatment
- 1200 micromoles mol-1 CO2e1
- Outcome
- Carboxylation efficiencye1
- Direction
- decreasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“'Georgia Red' peanut (Arachis hypogaea L.)”
e1“Carboxylation efficiency was similar among plants grown at 400 and 800 micromoles mol-1 and decreased at 1200 micromoles mol-1 CO2”
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13 papers in the same direction as this paper
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See all 14 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.