Abstract
It is widely accepted that leaf dark respiration is a determining factor for the growth and maintenance of plant tissues and the carbon cycle. However, the underlying effect and mechanism of elevated CO2 concentrations ([CO2]) on dark respiration remain unclear. In this study, tomato plants grown at elevated [CO2] showed consistently higher leaf dark respiratory rate, as compared with ambient control plants. The increased respiratory capacity was driven by a greater abundance of proteins, carbohydrates, and transcripts involved in pathways of glycolysis carbohydrate metabolism, the tricarboxylic acid cycle, and mitochondrial electron transport energy metabolism. This study provides substantial evidence in support of the concept that leaf dark respiration is increased by elevated [CO2] in tomato plants and suggests that the increased availability of carbohydrates and the increased energy status are involved in the increased rate of dark respiration in response to elevated [CO2].
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Claims 3
Claim · model-written summary
Elevated carbon dioxide increased tomato leaf dark respiration relative to ambient controls.
- Taxon
- tomato
Solanum lycopersicume0 - Treatment
- elevated [CO2]e0
- Outcome
- leaf dark respiratory ratee0
- Direction
- highere0
- Comparator
- ambient control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tomato plants grown at elevated [CO2] showed consistently higher leaf dark respiratory rate, as compared with ambient control plants”
Claim · model-written summary
Elevated carbon dioxide was associated with greater abundance of proteins, carbohydrates, and transcripts in respiration-related pathways.
- Taxon
- tomatoSolanum lycopersicumt0
- Outcome
- increased respiratory capacitye0
- Direction
- increasede0
- Qualifier
- greater abundance of proteins, carbohydrates, and transcriptse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increased respiratory capacity was driven by a greater abundance of proteins, carbohydrates, and transcripts involved in pathways of glycolysis carbohydrate metabolism, the tricarboxylic acid cycle, and mitochondrial electron transport energy metabolism”
t0“Tomato”
Claim · model-written summary
The authors suggest carbohydrate availability and energy status contribute to higher tomato dark respiration under elevated carbon dioxide.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- elevated [CO2]e0
- Outcome
- increased rate of dark respiratione0
- Qualifier
- increased availability of carbohydrates and the increased energy statuse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the increased availability of carbohydrates and the increased energy status are involved in the increased rate of dark respiration in response to elevated [CO2]”
t0“Tomato”
The same questions in other papers
co2 · physiology: respiration · Solanum lycopersicum (tomato)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- no effect
- 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.