Abstract
Little information is available concerning physiological responses of Kentucky bluegrass ( Poa pratensis L.) (KBG) cultivars to salinity. Growth and physiological responses of ‘Limousine’ and ‘Kenblue’ KBG to a range of salinity levels were investigated. Grasses were grown in solution culture and exposed to salinity levels of 2.2, 5.2, 8.2, 11.2, and 14.2 dS m −1 for 10 wk. Though both cultivars exhibited increased leaf firing with increasing salinity, Limousine exhibited less leaf firing than Kenblue at salinity levels above 5.2 dS m −1 In addition, salinity levels that caused 25% shoot growth reduction were 3.2 dS m −1 for Kenblue and 4.7 dS m −1 for Limousine, indicating that Limousine has better salinity tolerance. Under moderate (8.2 dS m −1 ) salinity stress, Limousine produced ∼50% more root growth than Kenblue. Water relations diverged between cultivars at 8.2 and 14.2 dS m −1 , as Limousine had higher leaf water and osmotic potentials, as well as more positive turgor. While glycinebetaine was not detected in either cultivar, proline increased in leaves with increasing salinity, and was higher in Kenblue than Limousine at 8.2, 11.2, and 14.2 dS m −1 This suggests that compatible solute accumulation is not a salinity tolerance mechanism of KBG, and that proline accumulation is merely an indication of salt injury. Limousine maintained 52% lower shoot Na + , 30.4% lower Cl − , and 52% higher shoot K + /Na + ratio than Kenblue at the highest salinity level. These results suggest that salinity tolerance in KBG is largely attributable to maintenance of higher root growth, and more positive turgor, higher K + /Na + ratio, and less Cl − accumulation in shoots. These traits may serve as useful selection criteria in breeding efforts to develop salt tolerant KBG.
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Claims 14
Claim · model-written summary
Kenblue reached 25% shoot growth reduction at 3.2 dS m−1 salinity.
- Taxon
- Kentucky bluegrass
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Poa pratensise0 - Material
- Kenbluee2
- Outcome
- salinity levels that caused 25% shoot growth reductione2
- Value
- 3.2 dS m −1e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Little information is available concerning physiological responses of Kentucky bluegrass ( Poa pratensis L.) (KBG) cultivars to salinity”
e2“salinity levels that caused 25% shoot growth reduction were 3.2 dS m −1 for Kenblue and 4.7 dS m −1 for Limousine”
Claim · model-written summary
Limousine reached 25% shoot growth reduction at 4.7 dS m−1 salinity.
- Taxon
- Kentucky bluegrassPoa pratensise0
- Material
- Limousinee2
- Outcome
- salinity levels that caused 25% shoot growth reductione2
- Value
- 4.7 dS m −1e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Little information is available concerning physiological responses of Kentucky bluegrass ( Poa pratensis L.) (KBG) cultivars to salinity”
e2“salinity levels that caused 25% shoot growth reduction were 3.2 dS m −1 for Kenblue and 4.7 dS m −1 for Limousine”
Claim · model-written summary
Limousine showed less leaf firing than Kenblue at salinity levels above 5.2 dS m−1.
- Taxon
- Kentucky bluegrassPoa pratensise0
- Material
- Limousinee1
- Treatment
- salinity levels above 5.2 dS m −1e1
- Outcome
- leaf firinge1
- Direction
- lesse1
- Comparator
- Kenbluee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Little information is available concerning physiological responses of Kentucky bluegrass ( Poa pratensis L.) (KBG) cultivars to salinity”
e1“Limousine exhibited less leaf firing than Kenblue at salinity levels above 5.2 dS m −1”
Claim · model-written summary
Under moderate salinity (8.2 dS m−1), Limousine produced about 50% more root growth than Kenblue.
- Taxon
- Kentucky bluegrassPoa pratensise0
- Material
- Limousinee4
- Treatment
- moderate (8.2 dS m −1 ) salinity stresse4
- Outcome
- root growthe4
- Direction
- moree4
- Value
- ∼50%e4
- Comparator
- Kenbluee4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Little information is available concerning physiological responses of Kentucky bluegrass ( Poa pratensis L.) (KBG) cultivars to salinity”
e4“Under moderate (8.2 dS m −1 ) salinity stress, Limousine produced ∼50% more root growth than Kenblue”
Claim · model-written summary
At 8.2 and 14.2 dS m−1, Limousine had higher leaf water and osmotic potentials than Kenblue.
- Taxon
- Kentucky bluegrassPoa pratensise0
- Material
- Limousinee5
- Treatment
- 8.2 and 14.2 dS m −1e5
- Outcome
- leaf water and osmotic potentialse5
- Direction
- highere5
- Comparator
- Kenbluee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Little information is available concerning physiological responses of Kentucky bluegrass ( Poa pratensis L.) (KBG) cultivars to salinity”
e2“salinity levels that caused 25% shoot growth reduction were 3.2 dS m −1 for Kenblue and 4.7 dS m −1 for Limousine”
e5“Water relations diverged between cultivars at 8.2 and 14.2 dS m −1 , as Limousine had higher leaf water and osmotic potentials, as well as more positive turgor”
Claim · model-written summary
At 8.2 and 14.2 dS m−1, Limousine had more positive turgor than Kenblue.
- Taxon
- Kentucky bluegrassPoa pratensise0
- Material
- Limousinee5
- Treatment
- 8.2 and 14.2 dS m −1e5
- Outcome
- turgore5
- Direction
- more positivee5
- Comparator
- Kenbluee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Little information is available concerning physiological responses of Kentucky bluegrass ( Poa pratensis L.) (KBG) cultivars to salinity”
e2“salinity levels that caused 25% shoot growth reduction were 3.2 dS m −1 for Kenblue and 4.7 dS m −1 for Limousine”
e5“Water relations diverged between cultivars at 8.2 and 14.2 dS m −1 , as Limousine had higher leaf water and osmotic potentials, as well as more positive turgor”
Claim · model-written summary
Glycinebetaine was not detected in either cultivar.
- Taxon
- Kentucky bluegrassPoa pratensise0
- Outcome
- glycinebetainee7
- Qualifier
- not detected in either cultivare7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Little information is available concerning physiological responses of Kentucky bluegrass ( Poa pratensis L.) (KBG) cultivars to salinity”
e7“While glycinebetaine was not detected in either cultivar”
Claim · model-written summary
Leaf proline increased with increasing salinity in Kentucky bluegrass.
- Taxon
- Kentucky bluegrassPoa pratensise0
- Organ / stage
- leavese1
- Treatment
- increasing salinitye1
- Outcome
- prolinee1
- Direction
- increasede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Little information is available concerning physiological responses of Kentucky bluegrass ( Poa pratensis L.) (KBG) cultivars to salinity”
e1“proline increased in leaves with increasing salinity”
Claim · model-written summary
Compatible solute accumulation is not a salinity tolerance mechanism of Kentucky bluegrass.
- Taxon
- Kentucky bluegrassPoa pratensise0
- Outcome
- salinity tolerance mechanisme3
- Qualifier
- compatible solute accumulation is note3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Little information is available concerning physiological responses of Kentucky bluegrass ( Poa pratensis L.) (KBG) cultivars to salinity”
e3“compatible solute accumulation is not a salinity tolerance mechanism of KBG”
Claim · model-written summary
Salinity tolerance in Kentucky bluegrass is largely attributable to maintenance of higher root growth.
- Taxon
- Kentucky bluegrassPoa pratensise0
- Outcome
- salinity tolerancee5
- Qualifier
- maintenance of higher root growthe5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Little information is available concerning physiological responses of Kentucky bluegrass ( Poa pratensis L.) (KBG) cultivars to salinity”
e5“salinity tolerance in KBG is largely attributable to maintenance of higher root growth”
Claim · model-written summary
Limousine maintained 52% lower shoot Na+ than Kenblue at the highest salinity level.
- Taxon
- Kentucky bluegrassPoa pratensise0
- Material
- Limousinee4
- Treatment
- highest salinity levele4
- Outcome
- shoot Nae4
- Direction
- lowere4
- Value
- 52%e4
- Comparator
- Kenbluee4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Little information is available concerning physiological responses of Kentucky bluegrass ( Poa pratensis L.) (KBG) cultivars to salinity”
e4“Limousine maintained 52% lower shoot Na + , 30.4% lower Cl − , and 52% higher shoot K + /Na + ratio than Kenblue at the highest salinity level”
Claim · model-written summary
Limousine maintained 30.4% lower shoot Cl− than Kenblue at the highest salinity level.
- Taxon
- Kentucky bluegrassPoa pratensise0
- Material
- Limousinee4
- Treatment
- highest salinity levele4
- Outcome
- Cle4
- Direction
- lowere4
- Value
- 30.4%e4
- Comparator
- Kenbluee4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Little information is available concerning physiological responses of Kentucky bluegrass ( Poa pratensis L.) (KBG) cultivars to salinity”
e4“Limousine maintained 52% lower shoot Na + , 30.4% lower Cl − , and 52% higher shoot K + /Na + ratio than Kenblue at the highest salinity level”
Claim · model-written summary
Limousine had a 52% higher shoot K+/Na+ ratio than Kenblue at the highest salinity level.
- Taxon
- Kentucky bluegrassPoa pratensise0
- Material
- Limousinee4
- Treatment
- highest salinity levele4
- Outcome
- K + /Na + ratioe4
- Direction
- highere4
- Value
- 52%e4
- Comparator
- Kenbluee4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Little information is available concerning physiological responses of Kentucky bluegrass ( Poa pratensis L.) (KBG) cultivars to salinity”
e4“Limousine maintained 52% lower shoot Na + , 30.4% lower Cl − , and 52% higher shoot K + /Na + ratio than Kenblue at the highest salinity level”
Claim · model-written summary
The traits may serve as useful selection criteria in breeding efforts to develop salt-tolerant KBG.
Verbatim
e6“These traits may serve as useful selection criteria in breeding efforts to develop salt tolerant KBG”
The same questions in other papers
salinity · growth · Poa pratensis (Kentucky bluegrass)Positive and negative results
1 paper in the same direction as this paper · 8 in the opposite direction
- negative
- negative
- negative
6 papers more in this group
See all 10 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.