Abstract
The effects of the high concentration of SA on the anti-oxidant enzymes reactivity of the rice seedling leaves under the drought stress have been surveyed.With the extension of the stress,the antioxidant enzymes reactivity and relative water content gradually decrease in the rice leaves.However,the water content of the rice seedlings pretreated by 10mmol.L-1 SA is lower than by H2O,but evidently higher than by H2O after four days under the drought stress.Moreover,the activity of catalase(CAT),peroxidase(POD) and superoxide dismutase(SOD) from the rice pretreated by SA are lower by H2O in the same time.The isozymes made up of CAT,POD and SOD from rice leaves are analyzed by non-denatured polyacrylamide gel electrophoresis and these figures show that the isozymes of SOD and POD do not change in bands pattern.Therefore,these results indicate that the high concentration of SA reduce the activity of anti-oxidative enzymes in leaves of the rice seedlings and weaken the tolerance of rice seedlings against drought-stress.
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Claims 6
Claim · model-written summary
Antioxidant enzyme activity and relative water content declined as drought stress extended.
- Taxon
- rice
Oryza sativae0 - Organ / stage
- leavese0
- Outcome
- antioxidant enzymes reactivity and relative water contente0
- Direction
- decreasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With the extension of the stress,the antioxidant enzymes reactivity and relative water content gradually decrease in the rice leaves”
Claim · model-written summary
SA-pretreated rice had lower water content than water-treated rice at an unspecified point.
- Taxon
- riceOryza sativae0
- Treatment
- 10mmol.L-1 SAe0
- Outcome
- water contente0
- Direction
- lowere0
- Comparator
- H2Oe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the water content of the rice seedlings pretreated by 10mmol.L-1 SA is lower than by H2O”
Claim · model-written summary
After four days of drought, SA-pretreated rice had higher water content than water-treated rice.
- Taxon
- riceOryza sativae1
- Treatment
- 10mmol.L-1 SAe1
- Outcome
- water contente1
- Direction
- highere0
- Qualifier
- after four days under the drought stresse0
- Comparator
- H2Oe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but evidently higher than by H2O after four days under the drought stress”
e1“the water content of the rice seedlings pretreated by 10mmol.L-1 SA is lower than by H2O”
Claim · model-written summary
SA pretreatment reduced CAT, POD, and SOD activities relative to water treatment.
- Taxon
- riceOryza sativae0
- Treatment
- SAe0
- Gene
- catalase(CAT),peroxidase(POD) and superoxide dismutase(SOD)e0
- Outcome
- activity of catalase(CAT),peroxidase(POD) and superoxide dismutase(SOD)e0
- Direction
- lowere0
- Comparator
- H2Oe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the activity of catalase(CAT),peroxidase(POD) and superoxide dismutase(SOD) from the rice pretreated by SA are lower by H2O in the same time”
Claim · model-written summary
SOD and POD isozyme band patterns did not change.
- Taxon
- riceOryza sativat0
- Gene
- SOD and PODe0
- Outcome
- bands patterne0
- Direction
- do not changee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the isozymes of SOD and POD do not change in bands pattern”
t0“Effects of SA on the Anti-oxidant Enzymes Reactivity of Rice Seedlings Under Drought Stress”
Claim · model-written summary
The authors concluded that high SA weakened rice-seedling drought tolerance.
- Taxon
- riceOryza sativae0
- Treatment
- high concentration of SAe0
- Outcome
- tolerance of rice seedlings against drought-stresse0
- Qualifier
- reduce the activity of anti-oxidative enzymese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the high concentration of SA reduce the activity of anti-oxidative enzymes in leaves of the rice seedlings and weaken the tolerance of rice seedlings against drought-stress”
The same questions in other papers
salicylic acid · physiology: antioxidant enzymes · Oryza sativa (rice)Results differ
3 papers in the same direction as this paper · 18 in the opposite direction
- positive
- positive
- positive
18 papers more in this group
See all 22 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.