Abstract
Foliar concentrations of starch and nutrients (N, K, Ca, Mg, P and S) were determined in three potato ( Solanum tuberosum L.) cvs Denali, Norland and Russet Burbank grown for 35 days under 500, 1000, 1500 and 2000 ppm CO 2 at each of 16 and 20C. The plants were grown in 8-liter plastic pots containing commercial peat-vermiculite mix under controlled environments with 450 μmol m -2 s -1 PPF for 12 h photoperiod. The average starch concentrations in three cultivars increased from 4.4% to 18.5% d.w. with increased CO 2 and decreased temperature. The starch concentrations were linearly related to specific leaf weight with a R 2 of 0.97. With or without starch correction, the concentrations of N, Ca, Mg, P and S on dry weight basis tended to decrease with elevated CO 2 , and reduced temperature whereas the concentration of K did not change with the CO 2 levels and was higher at 16C than at 20C. Combined mineral concentrations of N, Ca, Mg, P and S, before or after starch correction, were negatively related to the starch concentrations up to 14%, and then changed only slightly with higher starch concentrations. These results will be discussed in terms of potential growth enhancement from CO 2 supplementation.
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Claims 7
Claim · model-written summary
Potato leaf starch increased from 4.4% to 18.5% dry weight with increased CO2 and decreased temperature.
- Taxon
- potato
Solanum tuberosume0 - Treatment
- increased CO 2 and decreased temperaturee1
- Outcome
- starch concentrationse1
- Direction
- increasede1
- Value
- 4.4% to 18.5% d.w.e1
Not reportedOrgan / stageComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“three potato ( Solanum tuberosum L.) cvs Denali, Norland and Russet Burbank”
e1“The average starch concentrations in three cultivars increased from 4.4% to 18.5% d.w. with increased CO 2 and decreased temperature.”
Claim · model-written summary
Starch concentration was linearly related to specific leaf weight with R2 of 0.97.
- Taxon
- potatoSolanum tuberosume0
- Organ / stage
- leafe1
- Outcome
- starch concentrationse1
- Value
- 0.97e1
- Qualifier
- specific leaf weighte1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“potato”
e1“The starch concentrations were linearly related to specific leaf weight with a R 2 of 0.97.”
Claim · model-written summary
Foliar N, Ca, Mg, P and S concentrations tended to decrease with elevated CO2 and reduced temperature.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- elevated CO 2 , and reduced temperaturee1
- Outcome
- concentrations of N, Ca, Mg, P and Se1
- Direction
- decreasee1
- Qualifier
- tended toe1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“potato”
e1“the concentrations of N, Ca, Mg, P and S on dry weight basis tended to decrease with elevated CO 2 , and reduced temperature”
Claim · model-written summary
Foliar K concentration did not change with CO2 level.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- CO 2 levelse1
- Outcome
- concentration of Ke1
- Direction
- did not changee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“potato”
e1“the concentration of K did not change with the CO 2 levels”
Claim · model-written summary
Foliar K concentration was higher at 16C than at 20C.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- 16Ce1
- Outcome
- concentration of Ke2
- Direction
- highere1
- Comparator
- 20Ce1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“potato”
e1“was higher at 16C than at 20C”
e2“the concentration of K did not change with the CO 2 levels and was higher at 16C than at 20C”
Claim · model-written summary
Combined N, Ca, Mg, P and S concentration was negatively related to starch concentration up to 14%.
- Taxon
- potatoSolanum tuberosume0
- Outcome
- Combined mineral concentrations of N, Ca, Mg, P and Se1
- Direction
- negativelye1
- Qualifier
- starch concentrations up to 14%e1
Not reportedOrgan / stage
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“potato”
e1“Combined mineral concentrations of N, Ca, Mg, P and S, before or after starch correction, were negatively related to the starch concentrations up to 14%”
Claim · model-written summary
Above 14% starch, combined mineral concentrations changed only slightly.
- Taxon
- potatoSolanum tuberosume0
- Outcome
- starch concentrationse1
- Direction
- changed only slightlye1
- Qualifier
- higher starch concentrationse1
Not reportedOrgan / stage
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“potato”
e1“then changed only slightly with higher starch concentrations”
The same questions in other papers
co2 · molecular: metabolites · Solanum tuberosum (potato)Results agree
2 papers in the same direction as this paper
- no effect
- no effect
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.