Abstract
Gas exchange was measured for flag leaf of winter wheat in the flowering and dough stage under the free air CO2 enrichment(FACE) system.Photosynthetic parameters were also calculated by using a biochemical model.Research was conducted on the effect of the response curves and photosynthetic parameters with elevated CO2(550 μL·L-1).The results showed that the net photosynthesis rate,which increased with CO2 concentration in short term,decreased even disappeared in FACE rings both at flowering stage and dough stage.That means photosynthetic acclimation occurred in the flag leaf of winter wheat in FACE rings.There was not liner relationship between photosynthetic acclimation and N supply.SPAD and chlorophyll content in the flag leaf decreased with elevated CO2,which probably was main reason for photosynthetic acclimation.
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Claims 6
Claim · model-written summary
Net photosynthesis increased with CO2 concentration in the short term.
- Taxon
- winter wheat
Triticum aestivumt0 - Treatment
- CO2 concentratione0
- Outcome
- net photosynthesis ratee0
- Direction
- increasede0
- Qualifier
- short terme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the net photosynthesis rate,which increased with CO2 concentration in short term”
t0“winter wheat”
Claim · model-written summary
Net photosynthesis declined or disappeared in FACE rings at flowering and dough stages.
- Taxon
- winter wheatTriticum aestivumt0
- Organ / stage
- flowering stage and dough stagee0
- Treatment
- FACE ringse0
- Outcome
- net photosynthesis ratet1
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“decreased even disappeared in FACE rings both at flowering stage and dough stage”
t0“winter wheat”
t1“The results showed that the net photosynthesis rate,which increased with CO2 concentration in short term,decreased even disappeared in FACE rings both at flowering stage and dough stage.”
Claim · model-written summary
Photosynthetic acclimation occurred in flag leaves in FACE rings.
- Taxon
- winter wheatTriticum aestivume0
- Organ / stage
- flag leafe0
- Outcome
- photosynthetic acclimation occurrede0
- Setting
- FACE ringse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“photosynthetic acclimation occurred in the flag leaf of winter wheat in FACE rings.”
Claim · model-written summary
Photosynthetic acclimation had no linear relationship with N supply.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- N supplye0
- Outcome
- photosynthetic acclimatione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was not liner relationship between photosynthetic acclimation and N supply.”
t0“winter wheat”
Claim · model-written summary
SPAD and chlorophyll content fell under elevated CO2.
- Taxon
- winter wheatTriticum aestivumt0
- Organ / stage
- flag leafe0
- Treatment
- elevated CO2e0
- Outcome
- SPAD and chlorophyll contente0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SPAD and chlorophyll content in the flag leaf decreased with elevated CO2”
t0“winter wheat”
Claim · model-written summary
Reduced chlorophyll was proposed as a main reason for photosynthetic acclimation.
- Taxon
- winter wheatTriticum aestivumt0
- Outcome
- photosynthetic acclimatione0
- Qualifier
- chlorophyll content in the flag leaf decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“chlorophyll content in the flag leaf decreased with elevated CO2,which probably was main reason for photosynthetic acclimation.”
t0“winter wheat”
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