Abstract
Stress priming by exposing plants to a mild or moderate drought could enhance plant tolerance to subsequent heat stress. Lipids play vital roles in stress adaptation, but how lipidomic profiles change, affecting the cross-stress tolerance, is largely unknown. The objectives of this study were to perform lipidomics, to analyse the content, composition, and saturation levels of lipids in leaves of tall fescue (Festuca arundinacea) following drought priming and subsequent heat stress, and to identify major lipids and molecular species associated with priming-enhanced heat tolerance. Plants were initially exposed to drought for 8 days by withholding irrigation and subsequently subjected to 25 days of heat stress (38/33°C day/night) in growth chambers. Drought-primed plants maintained significantly higher leaf relative water content, chlorophyll content, photochemical efficiency, and lower electrolyte leakage than nonprimed plants under heat stress. Drought priming enhanced the accumulation of phospholipids and glycolipids involved in membrane stabilization and stress signalling (phosphatidic acid, phosphatidylcholine, phosphatidylinositol, phosphatidylglycerol, and digalactosyl diacylglycerol) during subsequent exposure to heat stress. The reprogramming of lipid metabolism for membrane stabilization and signalling in response to drought priming and subsequent exposure to heat stress could contribute to drought priming-enhanced heat tolerance in cool-season grass species.
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Claims 6
Claim · model-written summary
Primed plants maintained higher relative water content under heat.
- Taxon
- tall fescue
Lolium arundinaceume1 - Treatment
- Drought-primede0
- Outcome
- leaf relative water contente0
- Direction
- highere0
- Qualifier
- heat stresse0
- Comparator
- nonprimed plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought-primed plants maintained significantly higher leaf relative water content, chlorophyll content, photochemical efficiency, and lower electrolyte leakage than nonprimed plants under heat stress”
e1“tall fescue (Festuca arundinacea)”
Claim · model-written summary
Primed plants maintained higher chlorophyll content and photochemical efficiency.
- Taxon
- tall fescueLolium arundinaceume1
- Treatment
- Drought-primede0
- Outcome
- chlorophyll content, photochemical efficiencye0
- Direction
- highere0
- Qualifier
- heat stresse0
- Comparator
- nonprimed plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought-primed plants maintained significantly higher leaf relative water content, chlorophyll content, photochemical efficiency, and lower electrolyte leakage than nonprimed plants under heat stress”
e1“tall fescue (Festuca arundinacea)”
Claim · model-written summary
Primed plants had lower electrolyte leakage under heat.
- Taxon
- tall fescueLolium arundinaceume1
- Treatment
- Drought-primede0
- Outcome
- electrolyte leakagee0
- Direction
- lowere0
- Qualifier
- heat stresse0
- Comparator
- nonprimed plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought-primed plants maintained significantly higher leaf relative water content, chlorophyll content, photochemical efficiency, and lower electrolyte leakage than nonprimed plants under heat stress”
e1“tall fescue (Festuca arundinacea)”
Claim · model-written summary
Priming increased phosphatidic acid, phosphatidylcholine and phosphatidylinositol accumulation under heat.
- Taxon
- tall fescueLolium arundinaceume1
- Treatment
- Drought priminge0
- Outcome
- phosphatidic acid, phosphatidylcholine, phosphatidylinositole0
- Direction
- enhancede0
- Qualifier
- subsequent exposure to heat stresse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought priming enhanced the accumulation of phospholipids and glycolipids involved in membrane stabilization and stress signalling (phosphatidic acid, phosphatidylcholine, phosphatidylinositol, phosphatidylglycerol, and digalactosyl diacylglycerol) during subsequent exposure to heat stress”
e1“tall fescue (Festuca arundinacea)”
Claim · model-written summary
Priming increased phosphatidylglycerol and digalactosyl diacylglycerol accumulation.
- Taxon
- tall fescueLolium arundinaceume1
- Treatment
- Drought priminge0
- Outcome
- phosphatidylglycerol, and digalactosyl diacylglycerole0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought priming enhanced the accumulation of phospholipids and glycolipids involved in membrane stabilization and stress signalling (phosphatidic acid, phosphatidylcholine, phosphatidylinositol, phosphatidylglycerol, and digalactosyl diacylglycerol) during subsequent exposure to heat stress”
e1“tall fescue (Festuca arundinacea)”
Claim · model-written summary
Authors suggest lipid reprogramming could contribute to priming-enhanced heat tolerance.
- Taxon
- tall fescueLolium arundinaceume1
- Outcome
- drought priming-enhanced heat tolerancee0
- Qualifier
- reprogramming of lipid metabolism for membrane stabilization and signallinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The reprogramming of lipid metabolism for membrane stabilization and signalling in response to drought priming and subsequent exposure to heat stress could contribute to drought priming-enhanced heat tolerance in cool-season grass species”
e1“tall fescue (Festuca arundinacea)”
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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.