Abstract
Tall Fescue (Festuca arundinacea Schreb.) is a typical and widely used cool-season turf grass. High temperature is a key factor that limits its utility. The objectives of this study were to investigate the behaviors of fatty acid composition and its gene expression patterns in heat-resistant genotype 'TF71' and heat-sensitive genotype 'TF133' exposed to heat stress (40/35℃, 14/10 h), and to broaden our comprehension about the relationship between heat tolerance and fatty acid function. The result showed that heat stress increased the malondialdehyde (MDA) content and relative electrolyte leakage (EL), but decreased the level of chlorophyll and the activity of superoxide dismutase (SOD) and peroxidase (POD) when compared to the controls, to a greater extent in 'TF133'. This result proved that 'TF71' had superior high-temperature resistance. Furthermore, comparing the changes in the composition of fatty acid and the expression of the genes involved in its synthesis between the two different genotypes under heat stress, we found that heat stress increased the degree of unsaturation, UFA/SFA and double bond index (DBI) in 'TF71'. Moreover, quantitative RT-PCR revealed that heat stress altered the expression of the genes involved in fatty acid synthesis, including ACAC, FabD, FabF, FabH, FabI, and FatA. According to these findings, we can speculate that increasing the unsaturation degree of fatty acid or controlling the equilibrium ratio of UFA/SFA might be closely associated with the improving of the heat resistance in tall fescue.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 6
Claim · model-written summary
Heat stress increased malondialdehyde (MDA) content and relative electrolyte leakage in tall fescue, to a greater extent in TF133 than in controls.
- Taxon
- Tall Fescue
Lolium arundinaceume0 - Material
- 'TF133'e2
- Treatment
- heat stresse1
- Outcome
- malondialdehyde (MDA) content and relative electrolyte leakage (EL)e1
- Direction
- increasede1
- Comparator
- controlse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tall Fescue (Festuca arundinacea Schreb.)”
e1“heat stress increased the malondialdehyde (MDA) content and relative electrolyte leakage (EL)”
e2“when compared to the controls, to a greater extent in 'TF133'”
Claim · model-written summary
Heat stress decreased chlorophyll level and superoxide dismutase (SOD) and peroxidase (POD) activity in tall fescue compared with controls, to a greater extent in TF133.
- Taxon
- Tall FescueLolium arundinaceume0
- Material
- 'TF133'e2
- Treatment
- heat stresse1
- Outcome
- level of chlorophyll and the activity of superoxide dismutase (SOD) and peroxidase (POD)e1
- Direction
- decreasede1
- Comparator
- controlse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tall Fescue (Festuca arundinacea Schreb.)”
e1“The result showed that heat stress increased the malondialdehyde (MDA) content and relative electrolyte leakage (EL), but decreased the level of chlorophyll and the activity of superoxide dismutase (SOD) and peroxidase (POD)”
e2“when compared to the controls, to a greater extent in 'TF133'”
Claim · model-written summary
Tall fescue genotype TF71 showed superior high-temperature resistance.
- Taxon
- Tall FescueLolium arundinaceume0
- Material
- 'TF71'e1
- Outcome
- high-temperature resistancee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tall Fescue (Festuca arundinacea Schreb.)”
e1“This result proved that 'TF71' had superior high-temperature resistance”
Claim · model-written summary
Heat stress increased the degree of unsaturation, UFA/SFA ratio and double bond index of fatty acids in TF71.
- Taxon
- Tall FescueLolium arundinaceume0
- Material
- 'TF71'e1
- Treatment
- heat stresse1
- Outcome
- degree of unsaturation, UFA/SFA and double bond index (DBI)e1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tall Fescue (Festuca arundinacea Schreb.)”
e1“heat stress increased the degree of unsaturation, UFA/SFA and double bond index (DBI) in 'TF71'”
Claim · model-written summary
Heat stress altered the expression of fatty acid synthesis genes ACAC, FabD, FabF, FabH, FabI and FatA in tall fescue; the direction of change is not stated.
- Taxon
- Tall FescueLolium arundinaceume0
- Treatment
- heat stresse1
- Gene
- ACAC, FabD, FabF, FabH, FabI, and FatAe1
- Outcome
- expression of the genes involved in fatty acid synthesise1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tall Fescue (Festuca arundinacea Schreb.)”
e1“heat stress altered the expression of the genes involved in fatty acid synthesis, including ACAC, FabD, FabF, FabH, FabI, and FatA”
Claim · model-written summary
Increasing the unsaturation degree of fatty acids or controlling the UFA/SFA ratio might be associated with improved heat resistance in tall fescue.
- Taxon
- Tall FescueLolium arundinaceume0
- Compound
- fatty acide1
- Outcome
- heat resistancee1
- Qualifier
- might be closely associatede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tall Fescue (Festuca arundinacea Schreb.)”
e1“increasing the unsaturation degree of fatty acid or controlling the equilibrium ratio of UFA/SFA might be closely associated with the improving of the heat resistance in tall fescue”
The same questions in other papers
heat · physiology: oxidative · Lolium arundinaceum (tall fescue)Positive and negative results
3 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- negative
2 papers more in this group
See all 6 papers →heat · physiology: antioxidant enzymes · Lolium arundinaceum (tall fescue)Results agree
3 papers in the same direction as this paper
- no effect
- no effect
- 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.