Abstract
This study explored the performance and physiological responses of three commercially used peanut cultivars in Australian farming systems under ambient and elevated CO2 conditions, aiming to identify the most suitable genotype for dual-purpose (grain and graze) cropping experiments. The experiment utilized an open-top chamber (OTC) facility to regulate CO2 concentrations. The elevated CO2 (EC) treatment targeted approximately 650 ± 50 µmol mol−1, while both ambient CO2 (AC) and control plots operated at a concentration of approximately 400 µmol mol−1. Notably, control plots without chambers served as a reference for current CO2 and environmental conditions. In contrast, despite having the same ambient CO2 concentration, AC plots were enclosed in chambers, allowing for plant growth comparisons with EC plots with the same environmental conditions aside from CO2 levels. The analyses revealed significant effects of CO2 enrichment on peanut plants. In particular, the EC treatment led to enhanced photosynthetic rates (20% in Kairi, 31% in Holt, and 19% in Alloway), alongside reduced stomatal conductance (−55% in Kairi, −32% in Holt, and −40% in Alloway), transpiration, and increased water use efficiency compared to AC conditions. Elevated CO2 levels positively influenced pod yields in Kairi (+41%) and Alloway (+36%). However, CO2 enrichment did not significantly alter the protein content, total phenolic content, cupric-reducing antioxidant capacity, and ferric-reducing antioxidant power of peanut plant material. Furthermore, no significant differences were observed in the phytochemical composition among the three cultivars under ambient or elevated CO2 conditions. On the other hand, analysis of the fibre structure conducted on peanut stover harvested at plant maturity suggested potential declines in feedstock quality. Based on the findings of this research, further investigations and testing, including simulated grazing trials, will be carried out to identify a single breed line suitable for dual-purpose management under future elevated CO2 conditions.
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Claims 14
Claim · model-written summary
Elevated CO2 increased Kairi photosynthesis by 20%.
- Taxon
- Peanut
Arachis hypogaeat0 - Material
- Kairie0
- Outcome
- photosynthetic ratese0
- Direction
- enhancede0
- Value
- 20%e0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“enhanced photosynthetic rates (20% in Kairi, 31% in Holt, and 19% in Alloway)”
t0“Peanut”
Claim · model-written summary
Elevated CO2 increased Holt photosynthesis by 31%.
- Taxon
- PeanutArachis hypogaeat0
- Material
- Holte0
- Outcome
- photosynthetic ratese0
- Direction
- enhancede0
- Value
- 31%e0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“enhanced photosynthetic rates (20% in Kairi, 31% in Holt, and 19% in Alloway)”
t0“Peanut”
Claim · model-written summary
Elevated CO2 increased Alloway photosynthesis by 19%.
- Taxon
- PeanutArachis hypogaeat0
- Material
- Allowaye0
- Outcome
- photosynthetic ratese0
- Direction
- enhancede0
- Value
- 19%e0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“enhanced photosynthetic rates (20% in Kairi, 31% in Holt, and 19% in Alloway)”
t0“Peanut”
Claim · model-written summary
Elevated CO2 lowered Kairi stomatal conductance by 55%.
- Taxon
- PeanutArachis hypogaeat0
- Material
- Kairie0
- Outcome
- stomatal conductancee0
- Direction
- reducede0
- Value
- −55%e0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reduced stomatal conductance (−55% in Kairi, −32% in Holt, and −40% in Alloway)”
t0“Peanut”
Claim · model-written summary
Elevated CO2 lowered Holt stomatal conductance by 32%.
- Taxon
- PeanutArachis hypogaeat0
- Material
- Holte0
- Outcome
- stomatal conductancee0
- Direction
- reducede0
- Value
- −32%e0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reduced stomatal conductance (−55% in Kairi, −32% in Holt, and −40% in Alloway)”
t0“Peanut”
Claim · model-written summary
Elevated CO2 lowered Alloway stomatal conductance by 40%.
- Taxon
- PeanutArachis hypogaeat0
- Material
- Allowaye0
- Outcome
- stomatal conductancee0
- Direction
- reducede0
- Value
- −40%e0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reduced stomatal conductance (−55% in Kairi, −32% in Holt, and −40% in Alloway)”
t0“Peanut”
Claim · model-written summary
Elevated CO2 reduced transpiration.
- Taxon
- PeanutArachis hypogaeat0
- Outcome
- transpiratione0
- Direction
- reducede0
- Comparator
- AC conditionse0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reduced stomatal conductance (−55% in Kairi, −32% in Holt, and −40% in Alloway), transpiration, and increased water use efficiency compared to AC conditions”
t0“Peanut”
Claim · model-written summary
Elevated CO2 increased water use efficiency.
- Taxon
- PeanutArachis hypogaeat0
- Outcome
- water use efficiencye0
- Direction
- increasede0
- Comparator
- AC conditionse0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased water use efficiency compared to AC conditions”
t0“Peanut”
Claim · model-written summary
Elevated CO2 increased Kairi pod yield by 41%.
- Taxon
- PeanutArachis hypogaeat0
- Material
- Kairie0
- Treatment
- Elevated CO2 levelse0
- Outcome
- pod yieldse0
- Direction
- positively influencede0
- Value
- +41%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Elevated CO2 levels positively influenced pod yields in Kairi (+41%) and Alloway (+36%)”
t0“Peanut”
Claim · model-written summary
Elevated CO2 increased Alloway pod yield by 36%.
- Taxon
- PeanutArachis hypogaeat0
- Material
- Allowaye0
- Treatment
- Elevated CO2 levelse0
- Outcome
- pod yieldse0
- Direction
- positively influencede0
- Value
- +36%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Elevated CO2 levels positively influenced pod yields in Kairi (+41%) and Alloway (+36%)”
t0“Peanut”
Claim · model-written summary
Elevated CO2 did not significantly alter protein or phenolic content.
- Taxon
- peanutArachis hypogaeae0
- Treatment
- CO2 enrichmente0
- Outcome
- protein content, total phenolic contente0
- Direction
- did not significantly altere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CO2 enrichment did not significantly alter the protein content, total phenolic content, cupric-reducing antioxidant capacity, and ferric-reducing antioxidant power of peanut plant material”
Claim · model-written summary
Elevated CO2 did not significantly alter either measured antioxidant capacity.
- Taxon
- peanutArachis hypogaeae0
- Treatment
- CO2 enrichmente0
- Outcome
- cupric-reducing antioxidant capacity, and ferric-reducing antioxidant powere0
- Direction
- did not significantly altere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CO2 enrichment did not significantly alter the protein content, total phenolic content, cupric-reducing antioxidant capacity, and ferric-reducing antioxidant power of peanut plant material”
Claim · model-written summary
Phytochemical composition did not differ significantly among cultivars under either CO2 condition.
- Taxon
- PeanutArachis hypogaeat0
- Outcome
- phytochemical compositione0
- Direction
- no significant differencese0
- Qualifier
- under ambient or elevated CO2 conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no significant differences were observed in the phytochemical composition among the three cultivars under ambient or elevated CO2 conditions”
t0“Peanut”
Claim · model-written summary
Stover fiber structure suggested potential feedstock quality decline.
- Taxon
- peanutArachis hypogaeae0
- Organ / stage
- stovere0
- Outcome
- feedstock qualitye0
- Direction
- declinese0
- Qualifier
- potentiale0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“analysis of the fibre structure conducted on peanut stover harvested at plant maturity suggested potential declines in feedstock quality”
The same questions in other papers
co2 · yield · Arachis hypogaea (peanut)Results agree
13 papers in the same direction as this paper
- positive
- positive
- positive
10 papers more in this group
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.