Abstract
An experiment was conducted to assess whether exogenously applied SA through the rooting medium could mitigate the adverse effects of water stress on plant growth, photosynthesis and nutrient status of two wheat genotypes. For this purpose, salicylic acid @ 0, 5, and 10 mg L-1 was applied through the rooting medium to plants of two wheat lines growing in plastic beakers (250 mL) filled with Hoagland's nutrient solution containing 0 or 19 % PEG8000 to represent two water regimes of control (0 MPa) and-0.6 MPa respectively. Different levels of SA applied through the rooting medium increased photosynthetic rate in both cultivars under non-stress conditions but only in S-24 under water stress conditions. Exogenous application of 5 or 10 mg L-1 SA caused an increase in stomatal conductance, transpiration rate, and sub-stomatal of water stressed plants of cv. S-24 whereas it was true for droughted plants of MH-97 only when 5 mg L-1 SA applied. Cultivar S-24 was generally higher in N and P contents of shoot and root than that in genotype MH-97 under both normal and water stress conditions. A decrease in shoot and root N contents of both genotypes and shoot and root P contents of genotype S-24 only was observed in stressed plants when 5 mg L-1 of SA was applied through the rooting medium, whereas the same was true for root P and shoot Ca2+ contents in the non-stressed plants of both cultivars. Application of salicylic acid through the rooting medium significantly reduced the root K+ of two cultivars under both normal and water deficit conditions. Although, exogenously applied SA through the rooting medium had growth promoting effects under non-stress conditions, it did not mitigate the adverse effects of drought stress on growth of both cultivars, though genotype MH-97 showed some recovery under water stress conditions.
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Claims 12
Claim · model-written summary
Salicylic acid applied through the rooting medium increased photosynthetic rate in both cultivars under non-stress conditions.
- Taxon
- wheat
Triticum aestivumt0 - Treatment
- SA applied through the rooting mediume1
- Outcome
- photosynthetic ratee1
- Direction
- increasede1
- Qualifier
- under non-stress conditionse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“drought tolerance of wheat”
e1“Different levels of SA applied through the rooting medium increased photosynthetic rate in both cultivars under non-stress conditions”
Claim · model-written summary
Salicylic acid applied through the rooting medium increased photosynthetic rate only in S-24 under water stress conditions.
- Taxon
- wheatTriticum aestivumt0
- Material
- S-24e2
- Treatment
- SA applied through the rooting mediume1
- Outcome
- photosynthetic ratee1
- Direction
- increasede1
- Qualifier
- under water stress conditionse2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“drought tolerance of wheat”
e1“Different levels of SA applied through the rooting medium increased photosynthetic rate in both cultivars under non-stress conditions”
e2“but only in S-24 under water stress conditions”
Claim · model-written summary
Exogenous application of 5 or 10 mg L-1 SA increased stomatal conductance, transpiration rate and sub-stomatal conductance of water-stressed cv. S-24 plants.
- Taxon
- wheatTriticum aestivumt0
- Material
- cv. S-24e3
- Treatment
- Exogenous application of 5 or 10 mg L-1 SAe3
- Outcome
- stomatal conductance, transpiration rate, and sub-stomatale3
- Direction
- increasee3
- Qualifier
- water stressed plantse3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“drought tolerance of wheat”
e3“Exogenous application of 5 or 10 mg L-1 SA caused an increase in stomatal conductance, transpiration rate, and sub-stomatal of water stressed plants of cv. S-24”
Claim · model-written summary
In droughted MH-97 plants, 5 mg L-1 SA increased stomatal conductance, transpiration rate and sub-stomatal conductance, but only at that concentration.
- Taxon
- wheatTriticum aestivumt0
- Material
- MH-97e4
- Treatment
- 5 mg L-1 SA appliede4
- Outcome
- stomatal conductance, transpiration rate, and sub-stomatale3
- Direction
- increasee3
- Qualifier
- droughted plantse4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“drought tolerance of wheat”
e3“Exogenous application of 5 or 10 mg L-1 SA caused an increase in stomatal conductance, transpiration rate, and sub-stomatal of water stressed plants of cv. S-24”
e4“whereas it was true for droughted plants of MH-97 only when 5 mg L-1 SA applied”
Claim · model-written summary
Cultivar S-24 had generally higher shoot and root N and P contents than genotype MH-97 under both normal and water stress conditions.
- Taxon
- wheatTriticum aestivumt0
- Material
- S-24e5
- Organ / stage
- shoot and roote5
- Outcome
- N and P contents of shoot and roote5
- Direction
- highere5
- Qualifier
- under both normal and water stress conditionse5
- Comparator
- genotype MH-97e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“drought tolerance of wheat”
e5“Cultivar S-24 was generally higher in N and P contents of shoot and root than that in genotype MH-97 under both normal and water stress conditions”
Claim · model-written summary
Under stress with 5 mg L-1 SA, shoot and root N contents of both genotypes decreased.
- Taxon
- wheatTriticum aestivumt0
- Material
- both genotypese6
- Treatment
- 5 mg L-1 of SA was applied through the rooting mediume6
- Outcome
- shoot and root N contentse6
- Direction
- decreasee6
- Qualifier
- in stressed plantse6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“drought tolerance of wheat”
e6“A decrease in shoot and root N contents of both genotypes and shoot and root P contents of genotype S-24 only was observed in stressed plants when 5 mg L-1 of SA was applied through the rooting medium”
Claim · model-written summary
Under stress with 5 mg L-1 SA, shoot and root P contents of genotype S-24 only decreased.
- Taxon
- wheatTriticum aestivumt0
- Material
- genotype S-24e6
- Treatment
- 5 mg L-1 of SA was applied through the rooting mediume6
- Outcome
- shoot and root P contentse6
- Direction
- decreasee6
- Qualifier
- in stressed plantse6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“drought tolerance of wheat”
e6“A decrease in shoot and root N contents of both genotypes and shoot and root P contents of genotype S-24 only was observed in stressed plants when 5 mg L-1 of SA was applied through the rooting medium”
Claim · model-written summary
Under non-stress conditions with 5 mg L-1 SA, root P and shoot Ca2+ contents of both cultivars decreased.
- Taxon
- wheatTriticum aestivumt0
- Material
- both cultivarse7
- Treatment
- 5 mg L-1 of SA was applied through the rooting mediume6
- Outcome
- root P and shoot Ca2+ contentse7
- Direction
- decreasee6
- Qualifier
- in the non-stressed plantse7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“drought tolerance of wheat”
e6“A decrease in shoot and root N contents of both genotypes and shoot and root P contents of genotype S-24 only was observed in stressed plants when 5 mg L-1 of SA was applied through the rooting medium”
e7“whereas the same was true for root P and shoot Ca2+ contents in the non-stressed plants of both cultivars”
Claim · model-written summary
Salicylic acid applied through the rooting medium significantly reduced root K+ of two cultivars under both normal and water deficit conditions.
- Taxon
- wheatTriticum aestivumt0
- Material
- two cultivarse1
- Treatment
- Application of salicylic acid through the rooting mediume1
- Outcome
- root K+e1
- Direction
- reducede1
- Qualifier
- under both normal and water deficit conditionse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“drought tolerance of wheat”
e1“Application of salicylic acid through the rooting medium significantly reduced the root K+ of two cultivars under both normal and water deficit conditions”
Claim · model-written summary
Exogenously applied salicylic acid through the rooting medium promoted growth under non-stress conditions.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- exogenously applied SA through the rooting mediume1
- Outcome
- growthe1
- Direction
- promotinge1
- Qualifier
- under non-stress conditionse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“drought tolerance of wheat”
e1“Although, exogenously applied SA through the rooting medium had growth promoting effects under non-stress conditions”
Claim · model-written summary
Salicylic acid applied through the rooting medium did not mitigate the adverse effects of drought stress on growth of both cultivars.
- Taxon
- wheatTriticum aestivumt0
- Material
- both cultivarse2
- Treatment
- exogenously applied SA through the rooting mediume1
- Outcome
- adverse effects of drought stress on growthe2
- Direction
- did not mitigatee2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“drought tolerance of wheat”
e1“Although, exogenously applied SA through the rooting medium had growth promoting effects under non-stress conditions”
e2“it did not mitigate the adverse effects of drought stress on growth of both cultivars”
Claim · model-written summary
Genotype MH-97 showed some recovery under water stress conditions.
- Taxon
- wheatTriticum aestivumt0
- Material
- genotype MH-97e1
- Outcome
- recoverye1
- Qualifier
- under water stress conditionse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“drought tolerance of wheat”
e1“though genotype MH-97 showed some recovery under water stress conditions”
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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.