Abstract
Effects of salicylic acid (SA,1.0 mmol/L) on membrane lipid peroxidation under osmotic stress in wheat seedling leaves was studied.SA was added in a series of PEG (6000) solutions with different osmotic potential.The results were as follows:(1) SA decreased CAT activities in leaves;(2) SA has some roles in stabilizing membrane structure and function under light osmotic stress;(3) After leaves been treated by severe osmotic stress plus SA.The water losing,relative membrane permeability,H 2O 2 and malondialdehyde (MDA) contents and O -· 2 production rate in leaves increased a little,but SOD and PPOD activities was still higher compared with osmotic stress treatments that no SA added.It is suggested that the effect of SA in enhancing tolerance of wheat leaves to osmotic stress be closely correlated with the strength of the stress.There may be discrepancies in SA signal transduction pathway and mechanisms of SA in plant metabolism regulation under different conditions.
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Claims 7
Claim · model-written summary
Salicylic acid decreased CAT activity in wheat leaves.
- Taxon
- wheat
Triticum aestivumt0 - Treatment
- SAe0
- Gene
- CATe0
- Outcome
- CAT activities in leavese0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SA decreased CAT activities in leaves”
t0“wheat”
t1“wheat”
Claim · model-written summary
Salicylic acid helped stabilize membrane structure and function under light osmotic stress.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- SAe0
- Outcome
- membrane structure and functione0
- Direction
- stabilizinge0
- Qualifier
- under light osmotic stresse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SA has some roles in stabilizing membrane structure and function under light osmotic stress”
t0“wheat”
t1“wheat”
Claim · model-written summary
Under severe osmotic stress, adding salicylic acid slightly increased water loss and relative membrane permeability.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- severe osmotic stress plus SAe0
- Outcome
- water losing,relative membrane permeabilitye0
- Direction
- increased a littlee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After leaves been treated by severe osmotic stress plus SA.The water losing,relative membrane permeability,H 2O 2 and malondialdehyde (MDA) contents and O -· 2 production rate in leaves increased a little”
t0“wheat”
t1“wheat”
Claim · model-written summary
Under severe osmotic stress, adding salicylic acid slightly increased H2O2 and malondialdehyde content and superoxide production.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- severe osmotic stress plus SAe0
- Outcome
- H 2O 2 and malondialdehyde (MDA) contents and O -· 2 production rate in leavese0
- Direction
- increased a littlee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After leaves been treated by severe osmotic stress plus SA.The water losing,relative membrane permeability,H 2O 2 and malondialdehyde (MDA) contents and O -· 2 production rate in leaves increased a little”
t0“wheat”
t1“wheat”
Claim · model-written summary
SOD and PPOD activities remained higher with salicylic acid than with osmotic stress alone.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- SAe0
- Gene
- SOD and PPODe0
- Outcome
- SOD and PPOD activitiese0
- Direction
- highere0
- Comparator
- osmotic stress treatments that no SA addede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SOD and PPOD activities was still higher compared with osmotic stress treatments that no SA added”
t0“wheat”
t1“wheat”
Claim · model-written summary
The authors suggest that salicylic acid enhancement of wheat leaf stress tolerance depends on stress strength.
- Taxon
- wheatTriticum aestivume0
- Treatment
- SAe0
- Outcome
- tolerance of wheat leaves to osmotic stresse0
- Direction
- enhancinge0
- Qualifier
- strength of the stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effect of SA in enhancing tolerance of wheat leaves to osmotic stress be closely correlated with the strength of the stress”
Claim · model-written summary
The authors suggest salicylic acid signalling and metabolic regulation may differ across conditions.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- SA signal transduction pathway and mechanisms of SA in plant metabolism regulatione0
- Qualifier
- under different conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There may be discrepancies in SA signal transduction pathway and mechanisms of SA in plant metabolism regulation under different conditions.”
t0“wheat”
t1“wheat”
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