Abstract
This work aimed to evaluate if chilling stress may be mitigated by elevated CO2 (EC) in Beta vulgaris L. plants. Photosynthetic rate was measured at 21% and 2% O2 after a short-term exposure of 5 h at four different treatments: 360 μmol(CO2) mol-1/25°C (AC); 360 μmol(CO2) mol-1/4°C (AC+LT); 700 μmol(CO2) mol-1/25°C (EC); 700 μmol(CO2) mol-1/4°C (EC+LT). Compared to AC+LT, EC+LT plants showed higher values of CO2 fixation, photochemical activity, and Rubisco amount. These latter invest a higher portion of photosynthetic electron flow to O2, differently from AC+LT plants that promote the regulated thermal dissipation processes. In EC+LT plants, the photosynthetic electron flow to O2 acts as a safety mechanism against the excess of absorbed light, upon return to prechilling conditions, allowing photosynthetic apparatus to maintain its efficiency. In AC+LT plants, the increase of thermal dissipation processes was not adequate to guarantee the PSII photoprotection and the photosynthetic recovery after chilling.
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Claims 5
Claim · model-written summary
In chilled plants at elevated CO2 (EC+LT), CO2 fixation, photochemical activity and Rubisco amount were higher than in chilled plants at ambient CO2 (AC+LT).
- Taxon
- Beta vulgaris
Beta vulgarise0 - Treatment
- elevated CO2 (EC)e0
- Outcome
- CO2 fixation, photochemical activity, and Rubisco amounte1
- Direction
- highere1
- Comparator
- AC+LTe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This work aimed to evaluate if chilling stress may be mitigated by elevated CO2 (EC) in Beta vulgaris L. plants”
e1“Compared to AC+LT, EC+LT plants showed higher values of CO2 fixation, photochemical activity, and Rubisco amount”
Claim · model-written summary
In chilled plants at elevated CO2, photosynthetic electron flow to O2 acts as a safety mechanism against excess absorbed light on return to prechilling conditions, allowing the photosynthetic apparatus to maintain its efficiency.
- Taxon
- Beta vulgarisBeta vulgarise0
- Outcome
- photosynthetic apparatus to maintain its efficiencye2
- Qualifier
- the photosynthetic electron flow to O2 acts as a safety mechanism against the excess of absorbed lighte2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This work aimed to evaluate if chilling stress may be mitigated by elevated CO2 (EC) in Beta vulgaris L. plants”
e2“In EC+LT plants, the photosynthetic electron flow to O2 acts as a safety mechanism against the excess of absorbed light, upon return to prechilling conditions, allowing photosynthetic apparatus to maintain its efficiency”
Claim · model-written summary
In chilled plants at ambient CO2, the increase of thermal dissipation processes was not adequate to guarantee PSII photoprotection and photosynthetic recovery after chilling.
- Taxon
- Beta vulgarisBeta vulgarise0
- Treatment
- chillinge3
- Outcome
- PSII photoprotection and the photosynthetic recovery after chillinge3
- Qualifier
- the increase of thermal dissipation processes was not adequatee3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This work aimed to evaluate if chilling stress may be mitigated by elevated CO2 (EC) in Beta vulgaris L. plants”
e3“In AC+LT plants, the increase of thermal dissipation processes was not adequate to guarantee the PSII photoprotection and the photosynthetic recovery after chilling”
Claim · model-written summary
Chilled plants at elevated CO2 invest a higher portion of photosynthetic electron flow to O2 than chilled plants at ambient CO2.
- Taxon
- Beta vulgarisBeta vulgarise0
- Treatment
- elevated CO2 (EC)e0
- Outcome
- portion of photosynthetic electron flow to O2e4
- Direction
- highere4
- Comparator
- AC+LT plantse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This work aimed to evaluate if chilling stress may be mitigated by elevated CO2 (EC) in Beta vulgaris L. plants”
e4“These latter invest a higher portion of photosynthetic electron flow to O2, differently from AC+LT plants that promote the regulated thermal dissipation processes”
Claim · model-written summary
Chilled plants at ambient CO2 promote regulated thermal dissipation processes.
- Taxon
- Beta vulgarisBeta vulgarise0
- Outcome
- regulated thermal dissipation processese4
- Qualifier
- AC+LT plantse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This work aimed to evaluate if chilling stress may be mitigated by elevated CO2 (EC) in Beta vulgaris L. plants”
e4“These latter invest a higher portion of photosynthetic electron flow to O2, differently from AC+LT plants that promote the regulated thermal dissipation processes”
The same questions in other papers
co2 · physiology: photosynthesis · Beta vulgaris (beet)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
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.