Abstract
We compared responses to drought and re-watering of greenhouse-grown cuttings of Populus x euramericana (Dode) Guinier clones, Luisa Avanzo and Dorskamp. Total leaf area, leaf number, leaf area increment and stomatal conductance were evaluated periodically during a 29-day drought period and for 16 days after re-watering. Soil water content and predawn leaf water potential (Psi(wp)) were measured on Days 29 and 45. On the same days, relative water content (RWC), specific leaf area (SLA), nitrogen, chlorophyll, soluble sugars, total phenols, flavanols and antioxidant activity were determined for leaves taken from the bottom to the top of each cutting. Leaves of Luisa Avanzo cuttings grew more rapidly than leaves of Dorskamp and exhibited higher SLA, but lower concentrations of nitrogen, chlorophyll and soluble sugars and lower antioxidant activity per unit area. On Day 29, after withholding water, both clones had closed their stomata, reduced rates of leaf growth, and lower Psi(wp) and RWC; however, the clones differed in their responses to soil water depletion. Compared to Dorskamp, Luisa Avanzo closed its stomata earlier and maintained higher Psi(wp), but lower RWC and leaf sugar concentrations. Antioxidant activity of leaf methanolic extracts decreased in response to water stress only in Luisa Avanzo. Leaf physiology and its modulation by water stress were age dependent in Luisa Avanzo.
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Claims 12
Claim · model-written summary
Luisa Avanzo leaves grew faster than Dorskamp leaves.
- Taxon
- Populus x euramericana
Populus ×canadensist0 - Material
- Luisa Avanzoe0
- Outcome
- Leavese0
- Direction
- more rapidlye0
- Comparator
- Dorskampe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaves of Luisa Avanzo cuttings grew more rapidly than leaves of Dorskamp and exhibited higher SLA, but lower concentrations of nitrogen, chlorophyll and soluble sugars and lower antioxidant activity per unit area”
t0“Populus x euramericana”
Claim · model-written summary
Luisa Avanzo leaves had higher SLA than Dorskamp.
- Taxon
- Populus x euramericanaPopulus ×canadensist0
- Material
- Luisa Avanzoe0
- Outcome
- SLAe0
- Direction
- highere0
- Comparator
- Dorskampe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaves of Luisa Avanzo cuttings grew more rapidly than leaves of Dorskamp and exhibited higher SLA, but lower concentrations of nitrogen, chlorophyll and soluble sugars and lower antioxidant activity per unit area”
t0“Populus x euramericana”
Claim · model-written summary
Luisa Avanzo had lower leaf nitrogen, chlorophyll, and soluble sugar concentrations.
- Taxon
- Populus x euramericanaPopulus ×canadensist0
- Material
- Luisa Avanzoe0
- Outcome
- concentrations of nitrogen, chlorophyll and soluble sugarse0
- Direction
- lowere0
- Comparator
- Dorskampe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaves of Luisa Avanzo cuttings grew more rapidly than leaves of Dorskamp and exhibited higher SLA, but lower concentrations of nitrogen, chlorophyll and soluble sugars and lower antioxidant activity per unit area”
t0“Populus x euramericana”
Claim · model-written summary
Luisa Avanzo had lower leaf antioxidant activity per area.
- Taxon
- Populus x euramericanaPopulus ×canadensist0
- Material
- Luisa Avanzoe1
- Outcome
- antioxidant activity per unit areae0
- Direction
- lowere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lower antioxidant activity per unit area”
t0“Populus x euramericana”
e1“Leaves of Luisa Avanzo cuttings grew more rapidly than leaves of Dorskamp”
Claim · model-written summary
Both clones closed stomata after water withholding.
- Taxon
- Populus x euramericanaPopulus ×canadensist0
- Treatment
- withholding watere0
- Outcome
- closed their stomatae0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“On Day 29, after withholding water, both clones had closed their stomata, reduced rates of leaf growth, and lower Psi(wp) and RWC”
t0“Populus x euramericana”
Claim · model-written summary
Both clones reduced leaf growth under water withholding.
- Taxon
- Populus x euramericanaPopulus ×canadensist0
- Treatment
- withholding watere0
- Outcome
- rates of leaf growthe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“On Day 29, after withholding water, both clones had closed their stomata, reduced rates of leaf growth, and lower Psi(wp) and RWC”
t0“Populus x euramericana”
Claim · model-written summary
Both clones had lower predawn water potential and relative water content after water withholding.
- Taxon
- Populus x euramericanaPopulus ×canadensist0
- Treatment
- withholding watere0
- Outcome
- Psi(wp) and RWCe0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“On Day 29, after withholding water, both clones had closed their stomata, reduced rates of leaf growth, and lower Psi(wp) and RWC”
t0“Populus x euramericana”
Claim · model-written summary
Luisa Avanzo closed stomata earlier than Dorskamp.
- Taxon
- Populus x euramericanaPopulus ×canadensist0
- Material
- Luisa Avanzoe0
- Outcome
- closed its stomatae0
- Direction
- earliere0
- Comparator
- Dorskampe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared to Dorskamp, Luisa Avanzo closed its stomata earlier and maintained higher Psi(wp), but lower RWC and leaf sugar concentrations”
t0“Populus x euramericana”
Claim · model-written summary
Luisa Avanzo maintained higher predawn water potential than Dorskamp.
- Taxon
- Populus x euramericanaPopulus ×canadensist0
- Material
- Luisa Avanzoe0
- Outcome
- Psi(wp)e0
- Direction
- highere0
- Comparator
- Dorskampe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared to Dorskamp, Luisa Avanzo closed its stomata earlier and maintained higher Psi(wp), but lower RWC and leaf sugar concentrations”
t0“Populus x euramericana”
Claim · model-written summary
Luisa Avanzo had lower RWC and leaf sugar concentrations than Dorskamp.
- Taxon
- Populus x euramericanaPopulus ×canadensist0
- Material
- Luisa Avanzoe0
- Outcome
- RWC and leaf sugar concentrationse0
- Direction
- lowere0
- Comparator
- Dorskampe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared to Dorskamp, Luisa Avanzo closed its stomata earlier and maintained higher Psi(wp), but lower RWC and leaf sugar concentrations”
t0“Populus x euramericana”
Claim · model-written summary
Water stress reduced leaf antioxidant activity only in Luisa Avanzo.
- Taxon
- Populus x euramericanaPopulus ×canadensist0
- Material
- Luisa Avanzoe0
- Treatment
- water stresse0
- Outcome
- Antioxidant activity of leaf methanolic extractse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Antioxidant activity of leaf methanolic extracts decreased in response to water stress only in Luisa Avanzo”
t0“Populus x euramericana”
Claim · model-written summary
Leaf physiological response to water stress depended on age in Luisa Avanzo.
- Taxon
- Populus x euramericanaPopulus ×canadensist0
- Material
- Luisa Avanzoe0
- Organ / stage
- agee0
- Outcome
- Leaf physiology and its modulation by water stresse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf physiology and its modulation by water stress were age dependent in Luisa Avanzo”
t0“Populus x euramericana”
The same questions in other papers
drought · growth · Populus x canadensis (hybrid black poplar)Positive and negative results
2 in the opposite direction
- positive
- positive
drought · physiology: water · Populus x canadensis (hybrid black poplar)Results agree
1 paper in the same direction as this paper
- negative
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.