Abstract
Elevated CO 2 may contribute toward plant tolerance to prolonged drought stress. The objective of this study was to investigate changes in protein abundance associated with mitigation of drought stress by elevated CO 2 in leaves of a cool-season grass species used as fine turfgrass. Plants of creeping bentgrass ( Agrostis stolonifera cv. Penncross) were grown at either ambient CO 2 concentration (400 µL·L −1 ) or elevated CO 2 concentration (800 µL·L −1 ) for 35 days under well-irrigated and fertilized conditions and then subjected to drought stress for 21 days by withholding irrigation. Plants exposed to elevated CO 2 concentration maintained higher leaf water content, membrane stability, and visual turf quality (TQ) under drought stress compared with plants grown under ambient CO 2 conditions. The abundance of proteins involved in photosynthetic carbon fixation and assimilation, including chloroplastic glyceraldehyde phosphate dehydrogenase A (GAPDH-A) and ribulose 1,5-bisphosphate carboxylase (RuBisCO) decreased less and the abundance of proteins involved in respiratory metabolism (i.e., cytosolic GAPDH) increased less during drought due to elevated CO 2 . The results suggest that elevated CO 2 lessened growth and physiological damages during drought by facilitating ribulose 1,5-bisphosphate regeneration and adenosine triphosphate (ATP) production in photosynthesis and downregulating factors contributing to respiratory metabolism.
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Claims 5
Claim · model-written summary
Elevated CO2 maintained higher leaf water content, membrane stability and turf quality during drought.
- Taxon
- creeping bentgrass
Agrostis stoloniferat0 - Organ / stage
- leafe0
- Treatment
- elevated CO 2 concentratione0
- Outcome
- leaf water content, membrane stability, and visual turf quality (TQ)e0
- Direction
- highere0
- Comparator
- ambient CO 2 conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants exposed to elevated CO 2 concentration maintained higher leaf water content, membrane stability, and visual turf quality (TQ) under drought stress compared with plants grown under ambient CO 2 conditions”
t0“Creeping Bentgrass”
Claim · model-written summary
Under drought, elevated CO2 reduced the decline in chloroplastic GAPDH-A abundance.
- Taxon
- creeping bentgrassAgrostis stoloniferat0
- Treatment
- elevated CO 2e0
- Gene
- chloroplastic glyceraldehyde phosphate dehydrogenase A (GAPDH-A)e0
- Outcome
- abundance of proteins involved in photosynthetic carbon fixation and assimilatione0
- Direction
- decreased lesse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The abundance of proteins involved in photosynthetic carbon fixation and assimilation, including chloroplastic glyceraldehyde phosphate dehydrogenase A (GAPDH-A) and ribulose 1,5-bisphosphate carboxylase (RuBisCO) decreased less and the abundance of proteins involved in respiratory metabolism (i.e., cytosolic GAPDH) increased less during drought due to elevated CO 2”
t0“Creeping Bentgrass”
Claim · model-written summary
Under drought, elevated CO2 reduced the decline in RuBisCO abundance.
- Taxon
- creeping bentgrassAgrostis stoloniferat0
- Treatment
- elevated CO 2e0
- Gene
- ribulose 1,5-bisphosphate carboxylase (RuBisCO)e0
- Outcome
- abundance of proteins involved in photosynthetic carbon fixation and assimilatione0
- Direction
- decreased lesse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The abundance of proteins involved in photosynthetic carbon fixation and assimilation, including chloroplastic glyceraldehyde phosphate dehydrogenase A (GAPDH-A) and ribulose 1,5-bisphosphate carboxylase (RuBisCO) decreased less and the abundance of proteins involved in respiratory metabolism (i.e., cytosolic GAPDH) increased less during drought due to elevated CO 2”
t0“Creeping Bentgrass”
Claim · model-written summary
Under drought, elevated CO2 reduced the rise in cytosolic GAPDH abundance.
- Taxon
- creeping bentgrassAgrostis stoloniferat0
- Treatment
- elevated CO 2e0
- Gene
- cytosolic GAPDHe0
- Outcome
- abundance of proteins involved in respiratory metabolisme0
- Direction
- increased lesse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the abundance of proteins involved in respiratory metabolism (i.e., cytosolic GAPDH) increased less during drought due to elevated CO 2”
t0“Creeping Bentgrass”
Claim · model-written summary
Authors suggest elevated CO2 lessened drought damage by promoting ribulose bisphosphate regeneration and ATP production while downregulating respiratory factors.
- Taxon
- creeping bentgrassAgrostis stoloniferat0
- Treatment
- elevated CO 2e0
- Outcome
- growth and physiological damagese0
- Direction
- lessenede0
- Qualifier
- facilitating ribulose 1,5-bisphosphate regeneration and adenosine triphosphate (ATP) production in photosynthesis and downregulating factors contributing to respiratory metabolisme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“elevated CO 2 lessened growth and physiological damages during drought by facilitating ribulose 1,5-bisphosphate regeneration and adenosine triphosphate (ATP) production in photosynthesis and downregulating factors contributing to respiratory metabolism”
t0“Creeping Bentgrass”
The same questions in other papers
co2 · quality: general · Agrostis stolonifera (creeping bent grass)Positive and negative results
2 in the opposite direction
- negative
- negative
co2 · physiology: photosynthesis · Agrostis stolonifera (creeping bent grass)Results agree
1 paper in the same direction as this paper
- 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.