Abstract
Changes in fatty acid composition and saturation levels may be involved in leaf tolerance to dehydration during drought stress and recovery on rewatering. The objective of this study was to compare changes in compositional and saturation levels of leaf fatty acids between two cultivars of Kentucky bluegrass ( Poa pratensis L.) contrasting in drought tolerance in response to drought stress and rewatering. Drought‐tolerant ‘Midnight’ and sensitive ‘Brilliant’ were maintained well‐watered (control) or subjected to drought for 15 d by withholding irrigation and then rewatered in a growth chamber. Compared to Brilliant, Midnight maintained higher turf quality, leaf photochemical efficiency, relative water content, and membrane stability expressed as electrolyte leakage during drought stress. Following rewatering, Midnight recovered more rapidly in each parameter than Brilliant. The degree of fatty acid unsaturation decreased in both cultivars during drought stress, and the decrease was less pronounced and occurred later in Midnight. Fatty acid unsaturation level resumed to the control level in Midnight leaves, but did not fully recover in Brilliant after rewatering. The alteration in fatty acid unsaturation level induced by drought and rewatering were mainly due to the changes in the composition of linolenic acids (18:3), linoleic acids (18:2), palmitic acids (16:0), and stearic acids (18:0). Our results suggest that leaf dehydration tolerance and postdrought recovery in Kentucky bluegrass was associated with their ability to maintain relative higher proportion and level of unsaturated fatty acids, particularly linolenic acids and linoleic acids.
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Claims 10
Claim · model-written summary
Midnight maintained higher turf quality, leaf photochemical efficiency and relative water content than Brilliant during drought stress.
- Taxon
- Kentucky Bluegrass
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Poa pratensist0 - Material
- Midnighte1
- Treatment
- drought stresse1
- Outcome
- turf quality, leaf photochemical efficiency, relative water contente1
- Direction
- highere1
- Comparator
- Brilliante1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
t0“Kentucky Bluegrass”
e1“Compared to Brilliant, Midnight maintained higher turf quality, leaf photochemical efficiency, relative water content, and membrane stability expressed as electrolyte leakage during drought stress”
Claim · model-written summary
Midnight maintained higher membrane stability than Brilliant during drought stress.
- Taxon
- Kentucky BluegrassPoa pratensist0
- Material
- Midnighte1
- Treatment
- drought stresse1
- Outcome
- membrane stabilitye1
- Direction
- highere1
- Qualifier
- expressed as electrolyte leakagee1
- Comparator
- Brilliante1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Kentucky Bluegrass”
e1“Compared to Brilliant, Midnight maintained higher turf quality, leaf photochemical efficiency, relative water content, and membrane stability expressed as electrolyte leakage during drought stress”
Claim · model-written summary
Midnight recovered more rapidly than Brilliant after rewatering in each parameter.
- Taxon
- Kentucky BluegrassPoa pratensist0
- Material
- Midnighte2
- Treatment
- rewateringe2
- Outcome
- recoverede2
- Direction
- more rapidlye2
- Qualifier
- in each parametere2
- Comparator
- Brilliante2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Kentucky Bluegrass”
e2“Following rewatering, Midnight recovered more rapidly in each parameter than Brilliant”
Claim · model-written summary
Degree of fatty acid unsaturation decreased in both cultivars during drought stress.
- Taxon
- Kentucky BluegrassPoa pratensist0
- Treatment
- drought stresse3
- Outcome
- degree of fatty acid unsaturatione3
- Direction
- decreasede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Kentucky Bluegrass”
e3“The degree of fatty acid unsaturation decreased in both cultivars during drought stress, and the decrease was less pronounced and occurred later in Midnight”
Claim · model-written summary
The decrease in fatty acid unsaturation was less pronounced and occurred later in Midnight.
- Taxon
- Kentucky BluegrassPoa pratensist0
- Material
- Midnighte3
- Treatment
- drought stresse3
- Outcome
- the decreasee3
- Direction
- less pronouncede3
- Qualifier
- occurred latere3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Kentucky Bluegrass”
e3“The degree of fatty acid unsaturation decreased in both cultivars during drought stress, and the decrease was less pronounced and occurred later in Midnight”
Claim · model-written summary
Fatty acid unsaturation level in Midnight resumed to the control level after rewatering.
- Taxon
- Kentucky BluegrassPoa pratensist0
- Material
- Midnighte4
- Treatment
- rewateringe4
- Outcome
- Fatty acid unsaturation levele4
- Direction
- resumede4
- Comparator
- control levele4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Kentucky Bluegrass”
e4“Fatty acid unsaturation level resumed to the control level in Midnight leaves, but did not fully recover in Brilliant after rewatering”
Claim · model-written summary
Fatty acid unsaturation level in Brilliant did not fully recover after rewatering.
- Taxon
- Kentucky BluegrassPoa pratensist0
- Material
- Brilliante4
- Treatment
- rewateringe4
- Outcome
- Fatty acid unsaturation levele4
- Direction
- did not fully recovere4
- Comparator
- control levele4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Kentucky Bluegrass”
e4“Fatty acid unsaturation level resumed to the control level in Midnight leaves, but did not fully recover in Brilliant after rewatering”
Claim · model-written summary
The alteration in fatty acid unsaturation level induced by drought and rewatering is mainly due to changes in linolenic acids (18:3) and linoleic acids (18:2).
- Taxon
- Kentucky BluegrassPoa pratensist0
- Treatment
- drought and rewateringe5
- Compound
- linolenic acids (18:3), linoleic acids (18:2)e5
- Outcome
- alteration in fatty acid unsaturation levele5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Kentucky Bluegrass”
e5“The alteration in fatty acid unsaturation level induced by drought and rewatering were mainly due to the changes in the composition of linolenic acids (18:3), linoleic acids (18:2), palmitic acids (16:0), and stearic acids (18:0)”
Claim · model-written summary
The alteration in fatty acid unsaturation level induced by drought and rewatering is mainly due to changes in palmitic acids (16:0) and stearic acids (18:0).
- Taxon
- Kentucky BluegrassPoa pratensist0
- Treatment
- drought and rewateringe5
- Compound
- palmitic acids (16:0), and stearic acids (18:0)e5
- Outcome
- alteration in fatty acid unsaturation levele5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Kentucky Bluegrass”
e5“The alteration in fatty acid unsaturation level induced by drought and rewatering were mainly due to the changes in the composition of linolenic acids (18:3), linoleic acids (18:2), palmitic acids (16:0), and stearic acids (18:0)”
Claim · model-written summary
Leaf dehydration tolerance and postdrought recovery were associated with maintaining a higher proportion and level of unsaturated fatty acids, particularly linolenic and linoleic acids.
- Taxon
- Kentucky BluegrassPoa pratensist0
- Compound
- unsaturated fatty acidse6
- Outcome
- leaf dehydration tolerance and postdrought recoverye6
- Direction
- highere6
- Qualifier
- particularly linolenic acids and linoleic acidse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Kentucky Bluegrass”
e6“Our results suggest that leaf dehydration tolerance and postdrought recovery in Kentucky bluegrass was associated with their ability to maintain relative higher proportion and level of unsaturated fatty acids, particularly linolenic acids and linoleic acids”
The same questions in other papers
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See all 8 papers →drought · physiology: oxidative · Poa pratensis (Kentucky bluegrass)Positive and negative results
4 papers in the same direction as this paper · 6 in the opposite direction
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See all 11 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.