Abstract
Single leaf photosynthetic rates and various leaf components of potato (Solanum tuberosum L.) were studied 1-3 days after reciprocally transferring plants between the ambient and elevated growth CO2 treatments. Plants were raised from individual tuber sections in controlled environment chambers at either ambient (36 Pa) or elevated (72 Pa) CO2. One half of the plants in each growth CO2 treatment were transferred to the opposite CO2 treatment 34 days after sowing (DAS). Net photosynthesis (Pn) rates and various leaf components were then measured 34, 35 and 37 DAS at both 36 and 72 Pa CO2. Three-day means of single leaf Pn rates, leaf starch, glucose, initial and total Rubisco activity, Rubisco protein, chlorophyll (a+b), chlorophyll (a/b), alpha-amino N, and nitrate levels differed significantly in the continuous ambient and elevated CO2 treatments. Acclimation of single leaf Pn rates was partially to completely reversed 3 days after elevated CO2-grown plants were shifted to ambient CO2, whereas there was little evidence of photosynthetic acclimation 3 days after ambient CO2-grown plants were shifted to elevated CO2. In a four-way comparison of the 36, 72, 36 to 72 (shifted up) and 72 to 36 (shifted down) Pa CO2 treatments 37 DAS, leaf starch, soluble carbohydrates, Rubisco protein and nitrate were the only photosynthetic factors that differed significantly. Simple and multiple regression analyses suggested that negative changes of Pn in response to growth CO2 treatment were most closely correlated with increased leaf starch levels.
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Claims 8
Claim · model-written summary
Continuous ambient and elevated CO2 treatments differed significantly in leaf photosynthesis and several metabolic components.
- Taxon
- Solanum tuberosum
Solanum tuberosumt0 - Treatment
- continuous ambient and elevated CO2 treatmentse0
- Outcome
- single leaf Pn rates, leaf starch, glucosee0
- Direction
- differede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Three-day means of single leaf Pn rates, leaf starch, glucose, initial and total Rubisco activity, Rubisco protein, chlorophyll (a+b), chlorophyll (a/b), alpha-amino N, and nitrate levels differed significantly in the continuous ambient and elevated CO2 treatments”
t0“Solanum tuberosum”
Claim · model-written summary
Rubisco activity and protein differed significantly between continuous ambient and elevated CO2 treatments.
- Taxon
- Solanum tuberosumSolanum tuberosumt0
- Treatment
- continuous ambient and elevated CO2 treatmentse0
- Outcome
- initial and total Rubisco activity, Rubisco proteine0
- Direction
- differede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“initial and total Rubisco activity, Rubisco protein, chlorophyll (a+b), chlorophyll (a/b), alpha-amino N, and nitrate levels differed significantly in the continuous ambient and elevated CO2 treatments”
t0“Solanum tuberosum”
Claim · model-written summary
Chlorophyll and nitrogen components differed significantly between continuous ambient and elevated CO2 treatments.
- Taxon
- Solanum tuberosumSolanum tuberosumt0
- Treatment
- continuous ambient and elevated CO2 treatmentse0
- Outcome
- chlorophyll (a+b), chlorophyll (a/b), alpha-amino Ne0
- Direction
- differede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“chlorophyll (a+b), chlorophyll (a/b), alpha-amino N, and nitrate levels differed significantly in the continuous ambient and elevated CO2 treatments”
t0“Solanum tuberosum”
Claim · model-written summary
Photosynthetic acclimation partly or fully reversed within three days when elevated-CO2-grown plants shifted to ambient CO2.
- Taxon
- Solanum tuberosumSolanum tuberosumt0
- Treatment
- shifted to ambient CO2e0
- Outcome
- Acclimation of single leaf Pn ratese0
- Direction
- reversede0
- Qualifier
- 3 dayse0
- Comparator
- elevated CO2-grown plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Acclimation of single leaf Pn rates was partially to completely reversed 3 days after elevated CO2-grown plants were shifted to ambient CO2”
t0“Solanum tuberosum”
Claim · model-written summary
There was little photosynthetic acclimation within three days when ambient-CO2-grown plants shifted to elevated CO2.
- Taxon
- Solanum tuberosumSolanum tuberosumt0
- Treatment
- shifted to elevated CO2e0
- Outcome
- photosynthetic acclimatione0
- Direction
- little evidencee0
- Qualifier
- 3 dayse0
- Comparator
- ambient CO2-grown plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was little evidence of photosynthetic acclimation 3 days after ambient CO2-grown plants were shifted to elevated CO2”
t0“Solanum tuberosum”
Claim · model-written summary
At day 37, leaf starch, soluble carbohydrates and Rubisco protein differed significantly among four CO2 regimes.
- Taxon
- Solanum tuberosumSolanum tuberosumt0
- Outcome
- leaf starch, soluble carbohydrates, Rubisco proteine0
- Direction
- differede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leaf starch, soluble carbohydrates, Rubisco protein and nitrate were the only photosynthetic factors that differed significantly”
t0“Solanum tuberosum”
Claim · model-written summary
At day 37, nitrate differed significantly among four CO2 regimes.
- Taxon
- Solanum tuberosumSolanum tuberosumt0
- Outcome
- nitratee0
- Direction
- differede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leaf starch, soluble carbohydrates, Rubisco protein and nitrate were the only photosynthetic factors that differed significantly”
t0“Solanum tuberosum”
Claim · model-written summary
Negative photosynthetic changes under growth CO2 treatment correlated most closely with increased leaf starch.
- Taxon
- Solanum tuberosumSolanum tuberosumt0
- Treatment
- growth CO2 treatmente0
- Compound
- leaf starche0
- Outcome
- Pne0
- Direction
- negative changese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“negative changes of Pn in response to growth CO2 treatment were most closely correlated with increased leaf starch levels”
t0“Solanum tuberosum”
The same questions in other papers
co2 · physiology: photosynthesis · Solanum tuberosum (potato)Results agree
14 papers in the same direction as this paper
- positive
- positive
- positive
11 papers more in this group
See all 15 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.