Abstract
We examined the interactions of water and nitrogen availability by subjecting two Populus clones. Tristis and Eugenei, to five soil moisture and three soil nitrogen levels. Nitrogen application significantly increased net photosynthesis and stomatal conductance of flooded Eugenei and Tristis. The onset of flooding caused partial stomatal closure. Net photosynthesis significantly declined after a longer flooding period. Emergence of adventitious roots on the submerged portions of stems in both clones seemingly helped net photosynthesis fully recover in Eugenei and partially recover in Tristis. Under the progressive drought conditions, stomatal conductance was more sensitive to drought than net photosynthesis in both clones. Addition of nitrogen to progressively drying soil induced more stomatal closure in both clones. The highest water‐use efficiency was found on the high‐N/severe drought zone for Eugenei, whereas it was found on the high‐N/mild to moderate drought zone for Tristis.
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Claims 10
Claim · model-written summary
Nitrogen increased net photosynthesis and stomatal conductance in flooded Eugenei and Tristis.
- Material
- Eugenei and Tristise0
- Treatment
- Nitrogen applicatione0
- Outcome
- net photosynthesis and stomatal conductancee0
- Direction
- increasede0
- Qualifier
- floodede0
PopulusNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen application significantly increased net photosynthesis and stomatal conductance of flooded Eugenei and Tristis.”
e1“two Populus clones. Tristis and Eugenei”
Claim · model-written summary
Flooding onset partially closed stomata.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The onset of flooding caused partial stomatal closure.”
e1“two Populus clones. Tristis and Eugenei”
Claim · model-written summary
Net photosynthesis declined significantly after prolonged flooding.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Net photosynthesis significantly declined after a longer flooding period.”
e1“two Populus clones. Tristis and Eugenei”
Claim · model-written summary
Adventitious roots appeared on submerged stems of both clones.
- Material
- both clonese0
- Organ / stage
- submerged portions of stemse0
- Outcome
- Emergence of adventitious rootse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Emergence of adventitious roots on the submerged portions of stems in both clones”
e1“two Populus clones. Tristis and Eugenei”
Claim · model-written summary
Net photosynthesis fully recovered in Eugenei during flooding.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“net photosynthesis fully recover in Eugenei and partially recover in Tristis.”
e1“two Populus clones. Tristis and Eugenei”
Claim · model-written summary
Net photosynthesis partially recovered in Tristis during flooding.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“net photosynthesis fully recover in Eugenei and partially recover in Tristis.”
e1“two Populus clones. Tristis and Eugenei”
Claim · model-written summary
Under progressive drought, stomatal conductance was more sensitive than net photosynthesis in both clones.
- Material
- both clonese0
- Outcome
- stomatal conductancee0
- Direction
- more sensitivee0
- Qualifier
- progressive drought conditionse0
- Comparator
- net photosynthesise0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under the progressive drought conditions, stomatal conductance was more sensitive to drought than net photosynthesis in both clones.”
e1“two Populus clones. Tristis and Eugenei”
Claim · model-written summary
Nitrogen addition to drying soil induced more stomatal closure in both clones.
- Material
- both clonese0
- Treatment
- Addition of nitrogen to progressively drying soile0
- Outcome
- stomatal closuree0
- Direction
- moree0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Addition of nitrogen to progressively drying soil induced more stomatal closure in both clones.”
e1“two Populus clones. Tristis and Eugenei”
Claim · model-written summary
Eugenei had its highest water-use efficiency under high nitrogen and severe drought.
- Material
- Eugeneie0
- Outcome
- water‐use efficiencye0
- Direction
- higheste0
- Qualifier
- high‐N/severe drought zonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest water‐use efficiency was found on the high‐N/severe drought zone for Eugenei”
e1“two Populus clones. Tristis and Eugenei”
Claim · model-written summary
Tristis had its highest water-use efficiency under high nitrogen and mild to moderate drought.
- Material
- Tristise0
- Outcome
- water‐use efficiencye1
- Direction
- higheste1
- Qualifier
- high‐N/mild to moderate drought zonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it was found on the high‐N/mild to moderate drought zone for Tristis.”
e1“The highest water‐use efficiency was found on the high‐N/severe drought zone for Eugenei”
e2“two Populus clones. Tristis and Eugenei”
The same questions in other papers
flooding · physiology: photosynthesis · Populus (poplar)Results differ
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- no effect
- negative
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See all 7 papers →nitrogen · physiology: gas exchange · Populus (poplar)Results agree
1 paper in the same direction as this paper
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nitrogen · physiology: photosynthesis · Populus (poplar)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
flooding · physiology: gas exchange · Populus (poplar)Results agree
4 papers in the same direction as this paper
- negative
- negative
- no effect
1 paper more in this group
See all 5 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.