Abstract
Mung bean（Vigna radiata L.） has the potential to establish symbiosis with rhizobia,and symbiotic association of soil micro flora may facilitate the photosynthesis and plant growth response to elevated[CO2].Mung bean was grown at either ambient CO2 400 μmol mol-1 or[CO2](（550+17） μmol mol-1) under free air carbon dioxide enrichment（FACE） experimental facility in North China.Elevated[CO2]increased net photosynthetic rate（Pn）,water use efficiency（WUE） and the non-photochemical quenching（NPQ） of upper most fully-expanded leaves,but decreased stomatal conductance（Gs）,intrinsic efficiency of PSII（Fv ’/Fm’）,quantum yield of PSII(φPSll) and proportion of open PSII reaction centers（qp）.At elevated[CO2],the decrease of Fv’/Fm’,φPSII,qp at the bloom stage were smaller than that at the pod stage.On the other hand,Pn was increased at elevated[CO2]by 18.7 and 7.4%at full bloom（R2） and pod maturity stages（R4）,respectively.From these findings,we concluded that as a legume despite greater nutrient supply to the carbon assimilation at elevated[CO2],photosynthetic capacity of mung bean was still suppressed under elevated[CO2]particularly at pod maturity stage but plant biomass and yield was increased by 11.6 and 14.2%,respectively.Further,these findings suggest that even under higher nutrient acquisition systems such as legumes,nutrient assimilation does not match carbon assimilation under elevated[CO2]and leads photosynthesis down-regulation to elevated[CO2].
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Claims 14
Claim · model-written summary
Elevated CO2 increased mung bean net photosynthetic rate（Pn）.
Not reportedTaxonComparator
Verbatim
e0“Elevated[CO2]increased net photosynthetic rate（Pn）,water use efficiency（WUE） and the non-photochemical quenching（NPQ） of upper most fully-expanded leaves,but decreased stomatal conductance（Gs）,intrinsic efficiency of PSII（Fv ’/Fm’）,quantum yield of PSII(φPSll) and proportion of open PSII reaction centers（qp）.”
t0“mung bean”
Claim · model-written summary
Elevated CO2 increased mung bean water use efficiency（WUE）.
Not reportedTaxonComparator
Verbatim
e0“Elevated[CO2]increased net photosynthetic rate（Pn）,water use efficiency（WUE） and the non-photochemical quenching（NPQ） of upper most fully-expanded leaves,but decreased stomatal conductance（Gs）,intrinsic efficiency of PSII（Fv ’/Fm’）,quantum yield of PSII(φPSll) and proportion of open PSII reaction centers（qp）.”
t0“mung bean”
Claim · model-written summary
Elevated CO2 increased mung bean non-photochemical quenching（NPQ）.
Not reportedTaxonComparator
Verbatim
e0“Elevated[CO2]increased net photosynthetic rate（Pn）,water use efficiency（WUE） and the non-photochemical quenching（NPQ） of upper most fully-expanded leaves,but decreased stomatal conductance（Gs）,intrinsic efficiency of PSII（Fv ’/Fm’）,quantum yield of PSII(φPSll) and proportion of open PSII reaction centers（qp）.”
t0“mung bean”
Claim · model-written summary
Elevated CO2 decreased mung bean stomatal conductance（Gs）.
Not reportedTaxonComparator
Verbatim
e0“Elevated[CO2]increased net photosynthetic rate（Pn）,water use efficiency（WUE） and the non-photochemical quenching（NPQ） of upper most fully-expanded leaves,but decreased stomatal conductance（Gs）,intrinsic efficiency of PSII（Fv ’/Fm’）,quantum yield of PSII(φPSll) and proportion of open PSII reaction centers（qp）.”
t0“mung bean”
Claim · model-written summary
Elevated CO2 decreased mung bean intrinsic efficiency of PSII（Fv ’/Fm’）.
Not reportedTaxonComparator
Verbatim
e0“Elevated[CO2]increased net photosynthetic rate（Pn）,water use efficiency（WUE） and the non-photochemical quenching（NPQ） of upper most fully-expanded leaves,but decreased stomatal conductance（Gs）,intrinsic efficiency of PSII（Fv ’/Fm’）,quantum yield of PSII(φPSll) and proportion of open PSII reaction centers（qp）.”
t0“mung bean”
Claim · model-written summary
Elevated CO2 decreased mung bean quantum yield of PSII(φPSll).
Not reportedTaxonComparator
Verbatim
e0“Elevated[CO2]increased net photosynthetic rate（Pn）,water use efficiency（WUE） and the non-photochemical quenching（NPQ） of upper most fully-expanded leaves,but decreased stomatal conductance（Gs）,intrinsic efficiency of PSII（Fv ’/Fm’）,quantum yield of PSII(φPSll) and proportion of open PSII reaction centers（qp）.”
t0“mung bean”
Claim · model-written summary
Elevated CO2 decreased mung bean proportion of open PSII reaction centers（qp）.
Not reportedTaxonComparator
Verbatim
e0“Elevated[CO2]increased net photosynthetic rate（Pn）,water use efficiency（WUE） and the non-photochemical quenching（NPQ） of upper most fully-expanded leaves,but decreased stomatal conductance（Gs）,intrinsic efficiency of PSII（Fv ’/Fm’）,quantum yield of PSII(φPSll) and proportion of open PSII reaction centers（qp）.”
t0“mung bean”
Claim · model-written summary
At elevated CO2, declines in PSII efficiency measures were smaller at bloom than pod stage.
- Organ / stage
- bloom stagee0
- Outcome
- decrease of Fv’/Fm’,φPSII,qpe0
- Direction
- smallere0
- Comparator
- pod stagee0
Not reportedTaxon
Verbatim
e0“At elevated[CO2],the decrease of Fv’/Fm’,φPSII,qp at the bloom stage were smaller than that at the pod stage.”
t0“mung bean”
Claim · model-written summary
Elevated CO2 increased mung bean Pn by 18.7% at full bloom.
Not reportedTaxonComparator
Verbatim
e0“Pn was increased at elevated[CO2]by 18.7 and 7.4%at full bloom（R2） and pod maturity stages（R4）,respectively.”
t0“mung bean”
Claim · model-written summary
Elevated CO2 increased mung bean Pn by 7.4% at pod maturity.
- Organ / stage
- pod maturity stages（R4）e0
- Treatment
- elevated[CO2]e0
- Outcome
- Pne0
- Direction
- increasede0
- Value
- 7.4%e0
Not reportedTaxonComparator
Verbatim
e0“Pn was increased at elevated[CO2]by 18.7 and 7.4%at full bloom（R2） and pod maturity stages（R4）,respectively.”
t0“mung bean”
Claim · model-written summary
Mung bean photosynthetic capacity was suppressed under elevated CO2, especially at pod maturity.
- Taxon
- mung bean
.jpg?width=60)
Vigna radiatae0 - Organ / stage
- pod maturity stagee0
- Treatment
- elevated[CO2]e0
- Outcome
- photosynthetic capacitye0
- Direction
- suppressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“photosynthetic capacity of mung bean was still suppressed under elevated[CO2]particularly at pod maturity stage but plant biomass and yield was increased by 11.6 and 14.2%,respectively.”
Claim · model-written summary
Elevated CO2 increased mung bean biomass by 11.6%.
- Taxon
- mung beanVigna radiatae0
- Treatment
- elevated[CO2]e0
- Outcome
- plant biomasse0
- Direction
- increasede0
- Value
- 11.6e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“photosynthetic capacity of mung bean was still suppressed under elevated[CO2]particularly at pod maturity stage but plant biomass and yield was increased by 11.6 and 14.2%,respectively.”
Claim · model-written summary
Elevated CO2 increased mung bean yield by 14.2%.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“photosynthetic capacity of mung bean was still suppressed under elevated[CO2]particularly at pod maturity stage but plant biomass and yield was increased by 11.6 and 14.2%,respectively.”
Claim · model-written summary
The authors suggest nutrient assimilation fails to match carbon assimilation under elevated CO2 and causes photosynthetic down-regulation.
- Outcome
- photosynthesis down-regulatione0
- Qualifier
- nutrient assimilation does not match carbon assimilatione0
Not reportedTaxon
Verbatim
e0“these findings suggest that even under higher nutrient acquisition systems such as legumes,nutrient assimilation does not match carbon assimilation under elevated[CO2]and leads photosynthesis down-regulation to elevated[CO2].”
t0“mung bean”
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