Abstract
The interaction of CO2 concentration and soil moisture on photosynthesis,growth and water use efficiency in oat(Avena sativa)was observed in the walk-in CO2 chamber.The results showed that low CO2 concentration inhibited photosynthesis and biomass production of oat greatly while elevated CO2 promoted them slightly.With soil moisture content declined,net photosynthetic rate and water use efficiency didn't change,whereas biomass and leaf N contents slightly decreased,and the ratio of root to shoot increased at low CO2 concentration.Net photosynthetic rate,the ratio of root to shoot and water use efficiency increased,whereas biomass significantly decreased,and leaf N content did not change at high CO2 concentration.These results suggested that low CO2 concentration did not intensify the negative effects of drought,and high CO2 concentration failed to relieve the negative effects of drought stress on oat.The adaptation of oat to low CO2 concentration may limit its responses to future high CO2 concentration.
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Claims 7
Claim · model-written summary
Low CO2 inhibited oat photosynthesis and biomass production.
- Taxon
- oat
Avena sativae0e1 - Treatment
- low CO2 concentratione0
- Outcome
- photosynthesis and biomass productione0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“low CO2 concentration inhibited photosynthesis and biomass production of oat greatly”
e1“oat(Avena sativa)”
Claim · model-written summary
Elevated CO2 slightly promoted oat photosynthesis and biomass production.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“while elevated CO2 promoted them slightly”
e1“oat(Avena sativa)”
Claim · model-written summary
At low CO2, declining moisture slightly reduced biomass and leaf N.
- Taxon
- oatAvena sativae0e1
- Treatment
- soil moisture content declinede0
- Outcome
- biomass and leaf N contentse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With soil moisture content declined,net photosynthetic rate and water use efficiency didn't change,whereas biomass and leaf N contents slightly decreased”
e1“oat(Avena sativa)”
Claim · model-written summary
At low CO2, declining moisture increased the root-to-shoot ratio.
- Taxon
- oatAvena sativae0e1
- Treatment
- low CO2 concentratione0
- Outcome
- ratio of root to shoote0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ratio of root to shoot increased at low CO2 concentration”
e1“oat(Avena sativa)”
Claim · model-written summary
At high CO2, declining moisture increased photosynthesis, root-to-shoot ratio and water use efficiency.
- Taxon
- oatAvena sativae0e1
- Treatment
- high CO2 concentratione0
- Outcome
- Net photosynthetic rate,the ratio of root to shoot and water use efficiencye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Net photosynthetic rate,the ratio of root to shoot and water use efficiency increased,whereas biomass significantly decreased,and leaf N content did not change at high CO2 concentration”
e1“oat(Avena sativa)”
Claim · model-written summary
At high CO2, declining moisture significantly reduced biomass.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Net photosynthetic rate,the ratio of root to shoot and water use efficiency increased,whereas biomass significantly decreased,and leaf N content did not change at high CO2 concentration”
e1“oat(Avena sativa)”
Claim · model-written summary
At high CO2, leaf N content did not change with declining moisture.
- Taxon
- oatAvena sativae0e1
- Treatment
- high CO2 concentratione0
- Outcome
- leaf N contente0
- Direction
- did not changee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leaf N content did not change at high CO2 concentration”
e1“oat(Avena sativa)”
The same questions in other papers
soil water · growth · Avena sativa (oats)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
- negative
co2 · growth · Avena sativa (oats)Positive and negative results
1 paper in the same direction as this paper · 5 in the opposite direction
- positive
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3 papers more in this group
See all 7 papers →co2 · physiology: photosynthesis · Avena sativa (oats)Results agree
1 paper in the same direction as this paper
- positive
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.