Abstract
Responses of a salt-tolerant line (Euroflor) and a salt-sensitive line (SMH-24) of sunflower to water deficit were assessed when 2-wk-old plants were subjected for 16 d to 0 or -0.6 MPa polyethylene glycol (8000) in aerated nutrient solution. The salt-tolerant line was superior to the salt-sensitive one in growth performance under simulated drought conditions. The two lines did not differ in leaf water, osmotic, and turgor potentials under water deficit. A decrease in leaf water and osmotic potentials as well as an increase in turgor potential were observed uniformly in both lines at -0.6 MPa polyethylene glycol. Stomatal conductance, transpiration, and gas exchange in Euroflor were not affected by water deficit, whereas all were in SMH-24. Euroflor had significantly greater values for all these variables than SMH-24. The lines did not differ in water-use efficiency. From this study it is clear that salt tolerance and drought tolerance of the two lines examined share osmotic effect. The differing degree of drought tolerance of the lines can be related to stomatal conductance, transpiration, and gas exchange but is independent of any of the water relation parameters measured.
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Claims 14
Claim · model-written summary
Euroflor grew better than SMH 24 under simulated drought.
- Taxon
- sunflower
Helianthus annuust0 - Material
- Euroflore1
- Outcome
- growth performancee0
- Direction
- superiore0
- Comparator
- SMH-24e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The salt-tolerant line was superior to the salt-sensitive one in growth performance under simulated drought conditions”
e1“a salt-tolerant line (Euroflor) and a salt-sensitive line (SMH-24) of sunflower”
t0“Sunflower Differing in Degree of Salt Tolerance”
Claim · model-written summary
The lines did not differ in leaf water, osmotic or turgor potential under deficit.
- Taxon
- SunflowerHelianthus annuust0
- Outcome
- leaf water, osmotic, and turgor potentialse0
- Direction
- did not differe0
- Qualifier
- under water deficite0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The two lines did not differ in leaf water, osmotic, and turgor potentials under water deficit”
t0“Sunflower”
Claim · model-written summary
Water deficit reduced leaf water potential in both sunflower lines.
- Taxon
- SunflowerHelianthus annuust0
- Treatment
- -0.6 MPa polyethylene glycole0
- Outcome
- leaf watere0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A decrease in leaf water and osmotic potentials as well as an increase in turgor potential were observed uniformly in both lines at -0.6 MPa polyethylene glycol”
t0“Sunflower”
Claim · model-written summary
Water deficit reduced leaf osmotic potential in both sunflower lines.
- Taxon
- SunflowerHelianthus annuust0
- Treatment
- -0.6 MPa polyethylene glycole0
- Outcome
- osmotic potentialse0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A decrease in leaf water and osmotic potentials as well as an increase in turgor potential were observed uniformly in both lines at -0.6 MPa polyethylene glycol”
t0“Sunflower”
Claim · model-written summary
Water deficit increased turgor potential in both sunflower lines.
- Taxon
- SunflowerHelianthus annuust0
- Treatment
- -0.6 MPa polyethylene glycole0
- Outcome
- turgor potentiale0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A decrease in leaf water and osmotic potentials as well as an increase in turgor potential were observed uniformly in both lines at -0.6 MPa polyethylene glycol”
t0“Sunflower”
Claim · model-written summary
Euroflor stomatal conductance was not affected by water deficit.
- Taxon
- SunflowerHelianthus annuust0
- Material
- Euroflore0
- Treatment
- water deficite0
- Outcome
- Stomatal conductancee0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Stomatal conductance, transpiration, and gas exchange in Euroflor were not affected by water deficit”
t0“Sunflower”
Claim · model-written summary
Euroflor transpiration was not affected by water deficit.
- Taxon
- SunflowerHelianthus annuust0
- Material
- Euroflore0
- Treatment
- water deficite0
- Outcome
- transpiratione0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Stomatal conductance, transpiration, and gas exchange in Euroflor were not affected by water deficit”
t0“Sunflower”
Claim · model-written summary
Euroflor gas exchange was not affected by water deficit.
- Taxon
- SunflowerHelianthus annuust0
- Material
- Euroflore0
- Treatment
- water deficite0
- Outcome
- gas exchangee0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Stomatal conductance, transpiration, and gas exchange in Euroflor were not affected by water deficit”
t0“Sunflower”
Claim · model-written summary
SMH 24 stomatal conductance, transpiration and gas exchange were affected by water deficit.
- Taxon
- SunflowerHelianthus annuust0
- Material
- SMH-24e0
- Treatment
- water deficite0
- Outcome
- Stomatal conductance, transpiration, and gas exchangee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Stomatal conductance, transpiration, and gas exchange in Euroflor were not affected by water deficit, whereas all were in SMH-24”
t0“Sunflower”
Claim · model-written summary
Euroflor had significantly greater stomatal conductance, transpiration and gas exchange than SMH 24.
- Taxon
- SunflowerHelianthus annuust0
- Material
- Euroflore0
- Outcome
- all these variablese0
- Direction
- greatere0
- Comparator
- SMH-24e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Euroflor had significantly greater values for all these variables than SMH-24”
t0“Sunflower”
Claim · model-written summary
The two lines did not differ in water use efficiency.
- Taxon
- SunflowerHelianthus annuust0
- Outcome
- water-use efficiencye0
- Direction
- did not differe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The lines did not differ in water-use efficiency”
t0“Sunflower”
Claim · model-written summary
The authors relate differential drought tolerance to stomatal conductance, transpiration and gas exchange.
- Taxon
- SunflowerHelianthus annuust0
- Material
- linese0
- Outcome
- drought tolerancee0
- Qualifier
- can be related to stomatal conductance, transpiration, and gas exchangee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The differing degree of drought tolerance of the lines can be related to stomatal conductance, transpiration, and gas exchange”
t0“Sunflower”
Claim · model-written summary
The authors judged differential drought tolerance independent of measured water relation parameters.
- Taxon
- SunflowerHelianthus annuust0
- Material
- linese0
- Outcome
- water relation parameters measurede0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The differing degree of drought tolerance of the lines can be related to stomatal conductance, transpiration, and gas exchange but is independent of any of the water relation parameters measured”
t0“Sunflower Differing in Degree of Salt Tolerance”
Claim · model-written summary
The authors conclude salt and drought tolerance share an osmotic effect in the two lines.
- Taxon
- SunflowerHelianthus annuust0
- Outcome
- share osmotic effecte0
- Qualifier
- salt tolerance and drought tolerancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“salt tolerance and drought tolerance of the two lines examined share osmotic effect”
t0“Sunflower”
The same questions in other papers
poly(ethylene glycol) · physiology: water · Helianthus annuus (common sunflower)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
- no effect
drought · physiology: gas exchange · Helianthus annuus (common sunflower)Results differ
6 papers in the same direction as this paper
- negative
- negative
- no effect
3 papers more in this group
See all 7 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.