Abstract
The effect of soil drenching with 10µM abscisic acid (ABA) on the physiological responses of two spring wheat (Triticum aestivum L.) cultivars released in different decades was evaluated when subjected to a water deficit at jointing or at booting. Exogenous ABA application increased the ABA concentration in the leaves, reduced the stomatal conductance (gs), slowed the rate of water use, decreased the lethal leaf water potential (ψ) used to measure desiccation tolerance and lowered the soil water content (SWC) at which leaf relative water content (RWC) began to decrease and wilting was observed. Exogenous ABA application also reduced reactive oxygen species (ROS) formation and increased antioxidant enzyme activity, leading to a reduction in the oxidative damage to lipid membranes in both cultivars exposed to water stress at jointing and booting. The decrease in leaf RWC and wilting occurred at lower values of SWC in the recently-released cultivar than in the earlier-released cultivar. The recently-released cultivar also had higher grain yield than the earlier-released cultivar at moderate water stress, but the grain yield in both cultivars was reduced by water stress and by the exogenous ABA treatment. However, exogenous ABA treatment increased transpiration efficiency for grain (TEG) of both cultivars under moderate water stress. These results indicate that ABA played an important role in slowing water use and enhancing the antioxidant defence during soil drying, but this did not result in increased yields under drought stress.
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Claims 15
Claim · model-written summary
Exogenous ABA increased leaf ABA concentration in wheat
- Taxon
- Triticum aestivum
Triticum aestivume0 - Treatment
- Exogenous ABA applicatione1
- Outcome
- ABA concentration in the leavese1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two spring wheat (Triticum aestivum L.) cultivars released in different decades”
e1“Exogenous ABA application increased the ABA concentration in the leaves”
Claim · model-written summary
Exogenous ABA reduced stomatal conductance in wheat under water deficit
- Taxon
- Triticum aestivumTriticum aestivume0
- Treatment
- Exogenous ABA applicatione1
- Outcome
- stomatal conductance (gs)e2
- Direction
- reducede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two spring wheat (Triticum aestivum L.) cultivars released in different decades”
e1“Exogenous ABA application increased the ABA concentration in the leaves”
e2“reduced the stomatal conductance (gs)”
Claim · model-written summary
Exogenous ABA slowed the rate of water use in wheat
- Taxon
- Triticum aestivumTriticum aestivume0
- Treatment
- Exogenous ABA applicatione1
- Outcome
- rate of water usee3
- Direction
- slowede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two spring wheat (Triticum aestivum L.) cultivars released in different decades”
e1“Exogenous ABA application increased the ABA concentration in the leaves”
e3“slowed the rate of water use”
Claim · model-written summary
Exogenous ABA decreased the lethal leaf water potential, indicating higher desiccation tolerance
- Taxon
- Triticum aestivumTriticum aestivume0
- Treatment
- Exogenous ABA applicatione1
- Outcome
- lethal leaf water potentiale4
- Direction
- decreasede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two spring wheat (Triticum aestivum L.) cultivars released in different decades”
e1“Exogenous ABA application increased the ABA concentration in the leaves”
e4“decreased the lethal leaf water potential (ψ) used to measure desiccation tolerance”
Claim · model-written summary
Exogenous ABA lowered the soil water content at which leaf RWC began to decrease and wilting was observed
- Taxon
- Triticum aestivumTriticum aestivume0
- Treatment
- Exogenous ABA applicatione1
- Outcome
- soil water content (SWC) at which leaf relative water content (RWC) began to decreasee5
- Direction
- lowerede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two spring wheat (Triticum aestivum L.) cultivars released in different decades”
e1“Exogenous ABA application increased the ABA concentration in the leaves”
e5“lowered the soil water content (SWC) at which leaf relative water content (RWC) began to decrease and wilting was observed”
Claim · model-written summary
Exogenous ABA reduced reactive oxygen species formation in wheat
- Taxon
- Triticum aestivumTriticum aestivume0
- Treatment
- Exogenous ABA applicatione6
- Outcome
- reactive oxygen species (ROS) formatione6
- Direction
- reducede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two spring wheat (Triticum aestivum L.) cultivars released in different decades”
e6“Exogenous ABA application also reduced reactive oxygen species (ROS) formation”
Claim · model-written summary
Exogenous ABA increased antioxidant enzyme activity in wheat
- Taxon
- Triticum aestivumTriticum aestivume0
- Treatment
- Exogenous ABA applicatione1
- Outcome
- antioxidant enzyme activitye7
- Direction
- increasede7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two spring wheat (Triticum aestivum L.) cultivars released in different decades”
e1“Exogenous ABA application increased the ABA concentration in the leaves”
e7“increased antioxidant enzyme activity”
Claim · model-written summary
Exogenous ABA reduced oxidative damage to lipid membranes in both cultivars under water stress at jointing and booting
- Taxon
- Triticum aestivumTriticum aestivume0
- Treatment
- Exogenous ABA applicatione1
- Outcome
- oxidative damage to lipid membranese2
- Direction
- reductione2
- Qualifier
- exposed to water stress at jointing and bootinge2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two spring wheat (Triticum aestivum L.) cultivars released in different decades”
e1“Exogenous ABA application increased the ABA concentration in the leaves”
e2“leading to a reduction in the oxidative damage to lipid membranes in both cultivars exposed to water stress at jointing and booting”
Claim · model-written summary
The recently-released cultivar lost leaf RWC and wilted at lower soil water content than the earlier-released cultivar
- Taxon
- Triticum aestivumTriticum aestivume0
- Material
- recently-released cultivare1
- Outcome
- decrease in leaf RWC and wiltinge1
- Direction
- lowere1
- Comparator
- earlier-released cultivare1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two spring wheat (Triticum aestivum L.) cultivars released in different decades”
e1“The decrease in leaf RWC and wilting occurred at lower values of SWC in the recently-released cultivar than in the earlier-released cultivar”
Claim · model-written summary
The recently-released cultivar had higher grain yield than the earlier-released cultivar under moderate water stress
- Taxon
- Triticum aestivumTriticum aestivume0
- Material
- recently-released cultivare1
- Treatment
- moderate water stresse1
- Outcome
- grain yielde1
- Direction
- highere1
- Comparator
- earlier-released cultivare1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two spring wheat (Triticum aestivum L.) cultivars released in different decades”
e1“The recently-released cultivar also had higher grain yield than the earlier-released cultivar at moderate water stress”
Claim · model-written summary
Water stress reduced grain yield in both wheat cultivars
- Taxon
- Triticum aestivumTriticum aestivume0
- Treatment
- water stresse1
- Outcome
- grain yielde1
- Direction
- reducede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two spring wheat (Triticum aestivum L.) cultivars released in different decades”
e1“the grain yield in both cultivars was reduced by water stress and by the exogenous ABA treatment”
Claim · model-written summary
Exogenous ABA treatment reduced grain yield in both wheat cultivars
- Taxon
- Triticum aestivumTriticum aestivume0
- Treatment
- exogenous ABA treatmente1
- Outcome
- grain yielde1
- Direction
- reducede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two spring wheat (Triticum aestivum L.) cultivars released in different decades”
e1“the grain yield in both cultivars was reduced by water stress and by the exogenous ABA treatment”
Claim · model-written summary
Exogenous ABA increased transpiration efficiency for grain under moderate water stress
- Taxon
- Triticum aestivumTriticum aestivume0
- Treatment
- exogenous ABA treatmente1
- Outcome
- transpiration efficiency for grain (TEG)e1
- Direction
- increasede1
- Qualifier
- under moderate water stresse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two spring wheat (Triticum aestivum L.) cultivars released in different decades”
e1“exogenous ABA treatment increased transpiration efficiency for grain (TEG) of both cultivars under moderate water stress”
Claim · model-written summary
Exogenous ABA did not increase yield under drought stress
- Taxon
- Triticum aestivumTriticum aestivume0
- Treatment
- exogenous ABA treatmente1
- Outcome
- yields under drought stresse2
- Direction
- no_changeinferrede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two spring wheat (Triticum aestivum L.) cultivars released in different decades”
e1“the grain yield in both cultivars was reduced by water stress and by the exogenous ABA treatment”
e2“but this did not result in increased yields under drought stress”
Claim · model-written summary
ABA slows water use and enhances antioxidant defence during soil drying in wheat
- Taxon
- Triticum aestivumTriticum aestivume0
- Compound
- ABAe1
- Outcome
- slowing water use and enhancing the antioxidant defencee1
- Qualifier
- during soil dryinge1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two spring wheat (Triticum aestivum L.) cultivars released in different decades”
e1“ABA played an important role in slowing water use and enhancing the antioxidant defence during soil drying”
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