Abstract
ABSTRACT The degree to which crops respond to atmospheric CO 2 enrichment may be influenced by nutrition. To determine the extent to which dry matter production, canopy and leaf photosynthesis, and transpiration are influenced by P and CO 2 , potatoes ( Solanum tuberosum L. cultivar Kennebec) were grown in outdoor soil–plant–atmosphere research (SPAR) chambers at two levels of CO 2 (400 or 800 μmol mol −1 ) and three levels of P fertilization. Total dry matter declined an average 42% between high and low P fertilizer and increased 13% in response to elevated CO 2 when averaged across the P treatments. This enhancement effect did not vary with level of P treatment. Leaf level photosynthetic rate was reduced 58% and stomatal conductance 43% between high and low P treatments. Biochemical model parameters for carboxylation rate, ribulose bisphosphate regeneration, and triose phosphate use were reduced by P deficiency but scarcely influenced by growth CO 2 . After tuber initiation, canopy assimilation rate increased under elevated CO 2 particularly at the middle levels of P fertilization, and diurnal canopy evapotranspiration showed a significant reduction in response to elevated CO 2 and declining P fertilizer. Lack of interactive effects between CO 2 and P on most measured responses suggests the effect of CO 2 enrichment on potato growth and assimilation is similar at each P‐treatment level; however, such effects may also be correlated with plant N status.
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Claims 10
Claim · model-written summary
Total dry matter of potato declined 42% between high and low P fertilizer
- Taxon
- Solanum tuberosum
Solanum tuberosume1 - Material
- Kennebece1
- Treatment
- low P fertilizere2
- Outcome
- Total dry mattere2
- Direction
- declinede2
- Value
- 42%e2
- Comparator
- highe2
- Setting
- outdoor soile1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“potatoes ( Solanum tuberosum L. cultivar Kennebec) were grown in outdoor soil”
e2“Total dry matter declined an average 42% between high and low P fertilizer and increased 13% in response to elevated CO 2 when averaged across the P treatments”
Claim · model-written summary
Total dry matter of potato increased 13% under elevated CO2 averaged across P treatments
- Taxon
- Solanum tuberosumSolanum tuberosume1
- Material
- Kennebece1
- Treatment
- elevated CO 2e2
- Outcome
- Total dry mattere2
- Direction
- increasede2
- Value
- 13%e2
- Setting
- outdoor soile1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“potatoes ( Solanum tuberosum L. cultivar Kennebec) were grown in outdoor soil”
e2“Total dry matter declined an average 42% between high and low P fertilizer and increased 13% in response to elevated CO 2 when averaged across the P treatments”
Claim · model-written summary
Leaf photosynthetic rate of potato was reduced 58% under low P relative to high P
- Taxon
- Solanum tuberosumSolanum tuberosume1
- Treatment
- low Pe3
- Outcome
- Leaf level photosynthetic ratee3
- Direction
- reducede3
- Value
- 58%e3
- Comparator
- highe3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Leaf level photosynthetic rate was reduced 58% and stomatal conductance 43% between high and low P treatments”
e1“potatoes ( Solanum tuberosum L. cultivar Kennebec) were grown in outdoor soil”
Claim · model-written summary
Stomatal conductance of potato was reduced 43% under low P relative to high P
- Taxon
- Solanum tuberosumSolanum tuberosume1
- Treatment
- low Pe3
- Outcome
- stomatal conductancee3
- Direction
- reducede3
- Value
- 43%e3
- Comparator
- highe3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Leaf level photosynthetic rate was reduced 58% and stomatal conductance 43% between high and low P treatments”
e1“potatoes ( Solanum tuberosum L. cultivar Kennebec) were grown in outdoor soil”
Claim · model-written summary
P deficiency reduced the biochemical model parameters for carboxylation rate, RuBP regeneration and triose phosphate use
- Taxon
- Solanum tuberosumSolanum tuberosume1
- Treatment
- P deficiencye4
- Outcome
- carboxylation rate, ribulose bisphosphate regeneration, and triose phosphate usee4
- Direction
- reducede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Biochemical model parameters for carboxylation rate, ribulose bisphosphate regeneration, and triose phosphate use were reduced by P deficiency but scarcely influenced by growth CO 2”
e1“potatoes ( Solanum tuberosum L. cultivar Kennebec) were grown in outdoor soil”
Claim · model-written summary
Growth CO2 scarcely influenced the biochemical model parameters of potato
- Taxon
- Solanum tuberosumSolanum tuberosume1
- Treatment
- growth CO 2e4
- Outcome
- carboxylation rate, ribulose bisphosphate regeneration, and triose phosphate usee4
- Direction
- scarcely influencede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Biochemical model parameters for carboxylation rate, ribulose bisphosphate regeneration, and triose phosphate use were reduced by P deficiency but scarcely influenced by growth CO 2”
e1“potatoes ( Solanum tuberosum L. cultivar Kennebec) were grown in outdoor soil”
Claim · model-written summary
After tuber initiation, canopy assimilation rate of potato increased under elevated CO2, particularly at middle P levels
- Taxon
- Solanum tuberosumSolanum tuberosume1
- Organ / stage
- After tuber initiatione6
- Treatment
- elevated CO 2e6
- Outcome
- canopy assimilation ratee6
- Direction
- increasede6
- Qualifier
- particularly at the middle levels of P fertilizatione6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“After tuber initiation, canopy assimilation rate increased under elevated CO 2 particularly at the middle levels of P fertilization”
e1“potatoes ( Solanum tuberosum L. cultivar Kennebec) were grown in outdoor soil”
Claim · model-written summary
Diurnal canopy evapotranspiration of potato was significantly reduced under elevated CO2 and declining P fertilizer
- Taxon
- Solanum tuberosumSolanum tuberosume1
- Treatment
- elevated CO 2 and declining P fertilizere7
- Outcome
- diurnal canopy evapotranspiratione7
- Direction
- reductione7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“diurnal canopy evapotranspiration showed a significant reduction in response to elevated CO 2 and declining P fertilizer”
e1“potatoes ( Solanum tuberosum L. cultivar Kennebec) were grown in outdoor soil”
Claim · model-written summary
The effect of elevated CO2 on potato enhancement did not vary with P level
- Taxon
- Solanum tuberosumSolanum tuberosume1
- Treatment
- level of P treatmente5
- Outcome
- enhancement effecte5
- Direction
- did not varye5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“This enhancement effect did not vary with level of P treatment”
e1“potatoes ( Solanum tuberosum L. cultivar Kennebec) were grown in outdoor soil”
Claim · model-written summary
Interactive effects of CO2 and P on most measured potato responses were absent
- Taxon
- Solanum tuberosumSolanum tuberosume1
- Treatment
- CO 2 and Pe0
- Outcome
- most measured responsese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lack of interactive effects between CO 2 and P on most measured responses”
e1“potatoes ( Solanum tuberosum L. cultivar Kennebec) were grown in outdoor soil”
The same questions in other papers
co2 · growth · Solanum tuberosum (potato)Positive and negative results
2 papers in the same direction as this paper · 19 in the opposite direction
- positive
- positive
- positive
18 papers more in this group
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.