Abstract
Elevated atmospheric CO2 and nitrogen are major environmental factors affecting shoot growth. The objectives of this study are to determine the interactive effects of elevated CO2 and nitrogen on leaf growth in tall fescue (Festuca arundinacea) and to identify major proteins and associated metabolic pathways underlying CO2-regulation of leaf growth under insufficient and sufficient nitrate conditions using proteomic analysis. Plants of tall fescue treated with low nitrate level (0.25 mM, LN), moderate nitrate level (4 mM, MN) and high nitrate level (32 mM, HN) were exposed to ambient (400 μmol mol–1) and elevated (800 μmol mol–1) CO2 concentrations in environment-controlled growth chambers. Increased atmospheric CO2 concentration increased leaf length and shoot biomass, which corresponded to increased content of indo-acetic acid, gibberellic acid, cytokinins and reduced content of abscisic acid under sufficient nitrate conditions (MN and HN conditions). Low nitrate supply limited shoot growth and hormonal responses to elevated CO2. Proteomic analysis of plants exposed to elevated CO2 under LN and MN conditions demonstrated the increases in the abundance of many proteins due to elevated CO2 under MN condition involved with cell cycle and proliferation, transcription and translation, photosynthesis (ribosomal and chlorophyll a/b-binding proteins), amino acids synthesis, sucrose and starch metabolism, as well as ABA signaling pathways (ABA-induced proteins). Our results revealed major proteins and associated metabolic pathways associated with the interactive effects of elevated CO2 and nitrate regulating leaf growth in a perennial grass species.
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Claims 8
Claim · model-written summary
Elevated carbon dioxide increased tall fescue leaf length under sufficient nitrate.
- Taxon
- tall fescue
Lolium arundinaceumt1 - Treatment
- Increased atmospheric CO2 concentratione0
- Outcome
- leaf lengthe0
- Direction
- increasede0
- Qualifier
- sufficient nitrate conditions (MN and HN conditions)e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increased atmospheric CO2 concentration increased leaf length and shoot biomass, which corresponded to increased content of indo-acetic acid, gibberellic acid, cytokinins and reduced content of abscisic acid under sufficient nitrate conditions (MN and HN conditions).”
t0“Perennial Grass Species”
t1“tall fescue (Festuca arundinacea)”
Claim · model-written summary
Elevated carbon dioxide increased tall fescue shoot biomass under sufficient nitrate.
- Taxon
- tall fescueLolium arundinaceume1
- Treatment
- Increased atmospheric CO2 concentratione0
- Outcome
- shoot biomasse0
- Direction
- increasede0
- Qualifier
- sufficient nitrate conditions (MN and HN conditions)e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increased atmospheric CO2 concentration increased leaf length and shoot biomass, which corresponded to increased content of indo-acetic acid, gibberellic acid, cytokinins and reduced content of abscisic acid under sufficient nitrate conditions (MN and HN conditions).”
e1“tall fescue (Festuca arundinacea)”
Claim · model-written summary
Elevated carbon dioxide corresponded to increased indo-acetic acid, gibberellic acid, and cytokinin content under sufficient nitrate.
- Taxon
- tall fescueLolium arundinaceume1
- Outcome
- content of indo-acetic acid, gibberellic acid, cytokininse0
- Direction
- increasede0
- Qualifier
- sufficient nitrate conditions (MN and HN conditions)e0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“which corresponded to increased content of indo-acetic acid, gibberellic acid, cytokinins and reduced content of abscisic acid under sufficient nitrate conditions (MN and HN conditions).”
e1“tall fescue (Festuca arundinacea)”
Claim · model-written summary
Elevated carbon dioxide corresponded to reduced abscisic acid content under sufficient nitrate.
- Taxon
- tall fescueLolium arundinaceume1
- Outcome
- content of abscisic acide0
- Direction
- reducede0
- Qualifier
- sufficient nitrate conditions (MN and HN conditions)e0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reduced content of abscisic acid under sufficient nitrate conditions (MN and HN conditions).”
e1“tall fescue (Festuca arundinacea)”
Claim · model-written summary
Low nitrate limited shoot growth and hormonal responses to elevated carbon dioxide.
- Taxon
- tall fescueLolium arundinaceume1
- Treatment
- Low nitrate supplye0
- Outcome
- shoot growth and hormonal responsese0
- Direction
- limitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Low nitrate supply limited shoot growth and hormonal responses to elevated CO2.”
e1“tall fescue (Festuca arundinacea)”
Claim · model-written summary
Elevated carbon dioxide increased abundance of proteins for cell proliferation, transcription, and translation under moderate nitrate.
- Taxon
- tall fescueLolium arundinaceume1
- Treatment
- elevated CO2e0
- Outcome
- abundance of many proteinse0
- Direction
- increasese0
- Qualifier
- under MN conditione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Proteomic analysis of plants exposed to elevated CO2 under LN and MN conditions demonstrated the increases in the abundance of many proteins due to elevated CO2 under MN condition involved with cell cycle and proliferation, transcription and translation, photosynthesis (ribosomal and chlorophyll a/b-binding proteins), amino acids synthesis, sucrose and starch metabolism, as well as ABA signaling pathways (ABA-induced proteins).”
e1“tall fescue (Festuca arundinacea)”
Claim · model-written summary
Elevated carbon dioxide increased abundance of proteins for photosynthesis, amino acid synthesis, and carbohydrate metabolism under moderate nitrate.
- Taxon
- tall fescueLolium arundinaceume1
- Treatment
- elevated CO2e0
- Outcome
- abundance of many proteinse0
- Direction
- increasese0
- Qualifier
- under MN conditione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Proteomic analysis of plants exposed to elevated CO2 under LN and MN conditions demonstrated the increases in the abundance of many proteins due to elevated CO2 under MN condition involved with cell cycle and proliferation, transcription and translation, photosynthesis (ribosomal and chlorophyll a/b-binding proteins), amino acids synthesis, sucrose and starch metabolism, as well as ABA signaling pathways (ABA-induced proteins).”
e1“tall fescue (Festuca arundinacea)”
Claim · model-written summary
Elevated carbon dioxide increased abundance of ABA-induced proteins under moderate nitrate.
- Taxon
- tall fescueLolium arundinaceume1
- Treatment
- elevated CO2e0
- Gene
- ABA-induced proteinse0
- Outcome
- abundance of many proteinse0
- Direction
- increasese0
- Qualifier
- under MN conditione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Proteomic analysis of plants exposed to elevated CO2 under LN and MN conditions demonstrated the increases in the abundance of many proteins due to elevated CO2 under MN condition involved with cell cycle and proliferation, transcription and translation, photosynthesis (ribosomal and chlorophyll a/b-binding proteins), amino acids synthesis, sucrose and starch metabolism, as well as ABA signaling pathways (ABA-induced proteins).”
e1“tall fescue (Festuca arundinacea)”
The same questions in other papers
co2 · growth · Lolium arundinaceum (tall fescue)Results differ
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- positive
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6 papers in the same direction as this paper · 14 in the opposite direction
- positive
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See all 21 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.