Abstract
Understanding how the biomass production and clone growth of perennial grasses respond to summer warming is crucial for understanding how grassland productivity responds to global warming. Here, we experimentally investigated the effects of summer warming on the biomass production and clonal growth of potted Leymus chinensis in a phytotron. Summer warming significantly decreased the biomass of both parent and daughter shoots, slightly increased the belowground biomass, and lead to a significant increase in root : shoot ratio. Warming significantly increased the total belowground bud number and decreased the daughter shoot number. Importantly, the proportions of each type of bud changed; vertical apical rhizome buds decreased, while horizontal rhizome buds increased in number. The change in proportions of each type of bud is closely related to the decrease in daughter shoot number, rhizome number and length, as well as the decrease in aboveground biomass and increase in belowground biomass. These results indicate that, as a rhizomatous, perennial grass, L. chinensis adopts a selective growth strategy that reduces the energy allocated to aboveground growth and emphasises the development of belowground organs. The implication is that continued summer warming, will further reduce the aboveground biomass production of temperate grasslands dominated by rhizomatous, perennial grasses. Inevitably, species that depend on these grasses for forage will suffer should global climate warming continue.
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Claims 9
Claim · model-written summary
Summer warming decreased biomass of both parent and daughter shoots.
- Taxon
- Leymus chinensisLeymus chinensist0
- Treatment
- Summer warminge0
- Outcome
- biomass of both parent and daughter shootse0
- Direction
- decreasede0
Not reportedComparator
Verbatim
e0“Summer warming significantly decreased the biomass of both parent and daughter shoots, slightly increased the belowground biomass, and lead to a significant increase in root : shoot ratio.”
t0“Leymus chinensis”
Claim · model-written summary
Summer warming increased belowground biomass.
- Taxon
- Leymus chinensisLeymus chinensist0
- Treatment
- Summer warminge0
- Outcome
- belowground biomasse0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“Summer warming significantly decreased the biomass of both parent and daughter shoots, slightly increased the belowground biomass, and lead to a significant increase in root : shoot ratio.”
t0“Leymus chinensis”
Claim · model-written summary
Summer warming increase root : shoot ratio.
- Taxon
- Leymus chinensisLeymus chinensist0
- Treatment
- Summer warminge0
- Outcome
- root : shoot ratioe0
- Direction
- increasee0
Not reportedComparator
Verbatim
e0“Summer warming significantly decreased the biomass of both parent and daughter shoots, slightly increased the belowground biomass, and lead to a significant increase in root : shoot ratio.”
t0“Leymus chinensis”
Claim · model-written summary
Warming increased total belowground bud number.
- Taxon
- Leymus chinensisLeymus chinensist0
- Treatment
- Warminge0
- Outcome
- total belowground bud numbere0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“Warming significantly increased the total belowground bud number and decreased the daughter shoot number.”
t0“Leymus chinensis”
Claim · model-written summary
Warming decreased daughter shoot number.
- Taxon
- Leymus chinensisLeymus chinensist0
- Treatment
- Warminge0
- Outcome
- daughter shoot numbere0
- Direction
- decreasede0
Not reportedComparator
Verbatim
e0“Warming significantly increased the total belowground bud number and decreased the daughter shoot number.”
t0“Leymus chinensis”
Claim · model-written summary
vertical apical rhizome buds decreased under warming.
- Taxon
- Leymus chinensisLeymus chinensist0
- Outcome
- vertical apical rhizome budse0
- Direction
- decreasede0
Verbatim
e0“vertical apical rhizome buds decreased, while horizontal rhizome buds increased in number.”
t0“Leymus chinensis”
Claim · model-written summary
horizontal rhizome buds increased under warming.
- Taxon
- Leymus chinensisLeymus chinensist0
- Outcome
- horizontal rhizome budse0
- Direction
- increasede0
Verbatim
e0“vertical apical rhizome buds decreased, while horizontal rhizome buds increased in number.”
t0“Leymus chinensis”
Claim · model-written summary
Bud type proportions were related to lower daughter shoot and rhizome measures and aboveground biomass, and higher belowground biomass.
- Taxon
- Leymus chinensisLeymus chinensist0
- Organ / stage
- bude0
- Outcome
- daughter shoot number, rhizome number and lengthe0
- Direction
- decreasee0
Verbatim
e0“The change in proportions of each type of bud is closely related to the decrease in daughter shoot number, rhizome number and length, as well as the decrease in aboveground biomass and increase in belowground biomass.”
t0“Leymus chinensis”
Claim · model-written summary
Continued summer warming is expected to further reduce aboveground biomass in rhizomatous perennial grasslands.
Verbatim
e0“continued summer warming, will further reduce the aboveground biomass production of temperate grasslands dominated by rhizomatous, perennial grasses.”
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heat · growth · Leymus chinensisResults differ
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