Abstract
Abstract Carbon allocation determines plant growth, fitness and reproductive success. However, climate warming and drought impacts on carbon allocation patterns in grasses are not well known, particularly following grazing or clipping. A widespread C 3 pasture grass, Festuca arundinacea , was grown at 26 and 30°C in controlled environment chambers and subjected to drought (65% reduction relative to well‐watered controls). Leaf, root and whole‐plant carbon fluxes were measured and linked to growth before and after clipping. Both drought and warming reduced gross primary production and plant biomass. Drought reduced net leaf photosynthesis but increased the leaf respiratory fraction of assimilated carbon. Warming increased root respiration but did not affect either net leaf photosynthesis or leaf respiration. There was no evidence of thermal acclimation. Moreover, root respiratory carbon loss was amplified in the combined drought and warming treatment and, in addition to a negative carbon balance aboveground, explained an enhanced reduction in plant biomass. Plant regrowth following clipping was strongly suppressed by drought, reflecting increased tiller mortality and exacerbated respiratory carbon loss. These findings emphasize the importance of considering carbon allocation patterns in response to grazing or clipping and interactions with climatic factors for sustainable pasture production in a future climate.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 10
Claim · model-written summary
Drought reduced gross primary production and plant biomass of Festuca arundinacea relative to well-watered controls.
- Taxon
- Festuca arundinacea
Lolium arundinaceume0 - Treatment
- droughte2
- Outcome
- gross primary production and plant biomasse1
- Direction
- reducede1
- Comparator
- well‐watered controlse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A widespread C 3 pasture grass, Festuca arundinacea , was grown at 26 and 30°C in controlled environment chambers”
e1“Both drought and warming reduced gross primary production and plant biomass”
e2“subjected to drought (65% reduction relative to well‐watered controls)”
Claim · model-written summary
Warming at 30 °C reduced gross primary production and plant biomass of Festuca arundinacea relative to 26 °C.
- Taxon
- Festuca arundinaceaLolium arundinaceume0
- Treatment
- warminge1
- Outcome
- gross primary production and plant biomasse1
- Direction
- reducede1
- Comparator
- 26 and 30°Ce0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A widespread C 3 pasture grass, Festuca arundinacea , was grown at 26 and 30°C in controlled environment chambers”
e1“Both drought and warming reduced gross primary production and plant biomass”
Claim · model-written summary
Drought reduced net leaf photosynthesis of Festuca arundinacea.
- Taxon
- Festuca arundinaceaLolium arundinaceume0
- Treatment
- droughte4
- Outcome
- net leaf photosynthesise4
- Direction
- reducede4
- Comparator
- well‐watered controlse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A widespread C 3 pasture grass, Festuca arundinacea , was grown at 26 and 30°C in controlled environment chambers”
e4“Drought reduced net leaf photosynthesis but increased the leaf respiratory fraction of assimilated carbon”
e2“subjected to drought (65% reduction relative to well‐watered controls)”
Claim · model-written summary
Drought increased the leaf respiratory fraction of assimilated carbon in Festuca arundinacea.
- Taxon
- Festuca arundinaceaLolium arundinaceume0
- Treatment
- droughte4
- Outcome
- leaf respiratory fraction of assimilated carbone4
- Direction
- increasede4
- Comparator
- well‐watered controlse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A widespread C 3 pasture grass, Festuca arundinacea , was grown at 26 and 30°C in controlled environment chambers”
e4“Drought reduced net leaf photosynthesis but increased the leaf respiratory fraction of assimilated carbon”
e2“subjected to drought (65% reduction relative to well‐watered controls)”
Claim · model-written summary
Warming increased root respiration of Festuca arundinacea.
- Taxon
- Festuca arundinaceaLolium arundinaceume0
- Treatment
- Warminge5
- Outcome
- root respiratione5
- Direction
- increasede5
- Comparator
- 26 and 30°Ce0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A widespread C 3 pasture grass, Festuca arundinacea , was grown at 26 and 30°C in controlled environment chambers”
e5“Warming increased root respiration but did not affect either net leaf photosynthesis or leaf respiration”
Claim · model-written summary
Warming did not affect net leaf photosynthesis or leaf respiration of Festuca arundinacea.
- Taxon
- Festuca arundinaceaLolium arundinaceume0
- Treatment
- Warminge5
- Outcome
- net leaf photosynthesis or leaf respiratione5
- Direction
- did not affecte5
- Comparator
- 26 and 30°Ce0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A widespread C 3 pasture grass, Festuca arundinacea , was grown at 26 and 30°C in controlled environment chambers”
e5“Warming increased root respiration but did not affect either net leaf photosynthesis or leaf respiration”
Claim · model-written summary
Festuca arundinacea showed no evidence of thermal acclimation.
- Taxon
- Festuca arundinaceaLolium arundinaceume0
- Outcome
- thermal acclimatione6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A widespread C 3 pasture grass, Festuca arundinacea , was grown at 26 and 30°C in controlled environment chambers”
e6“There was no evidence of thermal acclimation”
Claim · model-written summary
Root respiratory carbon loss was amplified in the combined drought and warming treatment.
- Taxon
- Festuca arundinaceaLolium arundinaceume0
- Treatment
- combined drought and warming treatmente7
- Outcome
- root respiratory carbon losse7
- Direction
- amplifiede7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A widespread C 3 pasture grass, Festuca arundinacea , was grown at 26 and 30°C in controlled environment chambers”
e7“root respiratory carbon loss was amplified in the combined drought and warming treatment”
Claim · model-written summary
Root respiratory carbon loss together with a negative aboveground carbon balance explained an enhanced reduction in plant biomass under combined drought and warming.
- Taxon
- Festuca arundinaceaLolium arundinaceume0
- Treatment
- combined drought and warming treatmente7
- Outcome
- enhanced reduction in plant biomasse1
- Qualifier
- root respiratory carbon losse7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A widespread C 3 pasture grass, Festuca arundinacea , was grown at 26 and 30°C in controlled environment chambers”
e7“root respiratory carbon loss was amplified in the combined drought and warming treatment”
e1“in addition to a negative carbon balance aboveground, explained an enhanced reduction in plant biomass”
Claim · model-written summary
Drought strongly suppressed plant regrowth following clipping in Festuca arundinacea.
- Taxon
- Festuca arundinaceaLolium arundinaceume0
- Treatment
- droughte1
- Outcome
- Plant regrowth following clippinge1
- Direction
- suppressede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A widespread C 3 pasture grass, Festuca arundinacea , was grown at 26 and 30°C in controlled environment chambers”
e1“Plant regrowth following clipping was strongly suppressed by drought”
The same questions in other papers
drought · yield · Lolium arundinaceum (tall fescue)Results differ
12 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
- negative
10 papers more in this group
See all 14 papers →drought · molecular: metabolites · Lolium arundinaceum (tall fescue)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
- no effect
heat · physiology: photosynthesis · Lolium arundinaceum (tall fescue)Positive and negative results
3 papers in the same direction as this paper · 3 reporting no difference from an alternative
- positive
- positive
- positive
3 papers more in this group
See all 7 papers →drought · physiology: photosynthesis · Lolium arundinaceum (tall fescue)Positive and negative results
4 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- negative
3 papers more in this group
See all 7 papers →heat · physiology: respiration · Lolium arundinaceum (tall fescue)Results agree
1 paper in the same direction as this paper
- negative
heat · yield · Lolium arundinaceum (tall fescue)Results agree
1 paper in the same direction as this paper
- negative
heat · molecular: metabolites · Lolium arundinaceum (tall fescue)Results agree
1 paper in the same direction as this paper
- negative
drought · growth · Lolium arundinaceum (tall fescue)Results agree
7 papers in the same direction as this paper
- negative
- negative
- negative
4 papers more in this group
See all 8 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.