Abstract
This paper studied the effects of exogenous salicylic acid(0,0.1,0.5,1.0,and 2.0 mmol·L-1) on the physiological characteristics of longan(Dimocarpus longana‘Fuyan’) seedlings under acid rain(pH 3.0) stress.Under the stress of the acid rain,the seedling’s leaf superoxide dismutase(SOD),peroxidase(POD),and catalase(CAT) activities as well as the leaf total chlorophyll,soluble protein,and soluble sugar contents decreased obviously,and the leaf malondialdedyde content had a remarkable increase,suggesting the toxic effect of the acid rain on the longan seedlings.Applying 0.1-1.0 mmol·L-1 of exogenous salicylic acid improved the SOD,POD,and CAT activities and the total chlorophyll,soluble protein,and soluble sugar contents significantly,and decreased the malondialdedyde content.Low concentrations of exogenous salicylic acid reduced the oxidative damage caused by the acid rain stress,and 0.5 mmol·L-1 of salicylic acid had the best effect.As compared with the acid rain stress alone,applying 0.5 mmol·L-1 of salicylic acid improved the SOD,POD,and CAT activities by 144%,440%,and 132%,and increased the total chlorophyll,soluble protein,and soluble sugar contents by 62%,105%,and 177%,respectively,and decreased the malondialdedyde content by 35%.It was suggested that low concentrations of exogenous salicylic acid(0.1-1.0 mmol·L-1) could alleviate the toxic effect of acid rain stress on longan seedlings via activating the seedlings leaf an-tioxidant enzyme activities and reducing oxidative stress,while high concentration of exogenous salicylic acid(2.0 mmol·L-1) lowered the mitigation effect.
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Claims 13
Claim · model-written summary
Acid rain lowered leaf antioxidant enzyme activities and chlorophyll, protein and sugar contents.
- Taxon
- longan
Dimocarpus longant0 - Treatment
- acid raine0
- Outcome
- leaf superoxide dismutase(SOD),peroxidase(POD),and catalase(CAT) activitiese0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under the stress of the acid rain,the seedling’s leaf superoxide dismutase(SOD),peroxidase(POD),and catalase(CAT) activities as well as the leaf total chlorophyll,soluble protein,and soluble sugar contents decreased obviously”
t0“longan seedlings”
Claim · model-written summary
Acid rain increased leaf malondialdedyde content.
- Taxon
- longanDimocarpus longant0
- Treatment
- acid raine1
- Outcome
- leaf malondialdedyde contente0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the leaf malondialdedyde content had a remarkable increase”
t0“longan seedlings”
e1“Under the stress of the acid rain”
Claim · model-written summary
Salicylic acid at 0.1–1.0 mmol·L-1 significantly increased SOD, POD and CAT activities.
- Taxon
- longanDimocarpus longant0
- Treatment
- 0.1-1.0 mmol·L-1 of exogenous salicylic acide0
- Outcome
- SOD,POD,and CAT activitiese0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Applying 0.1-1.0 mmol·L-1 of exogenous salicylic acid improved the SOD,POD,and CAT activities and the total chlorophyll,soluble protein,and soluble sugar contents significantly”
t0“longan seedlings”
Claim · model-written summary
Salicylic acid at 0.1–1.0 mmol·L-1 significantly increased chlorophyll, protein and sugar contents.
- Taxon
- longanDimocarpus longant0
- Treatment
- 0.1-1.0 mmol·L-1 of exogenous salicylic acide0
- Outcome
- total chlorophyll,soluble protein,and soluble sugar contentse0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Applying 0.1-1.0 mmol·L-1 of exogenous salicylic acid improved the SOD,POD,and CAT activities and the total chlorophyll,soluble protein,and soluble sugar contents significantly”
t0“longan seedlings”
Claim · model-written summary
Salicylic acid reduced malondialdedyde content.
- Taxon
- longanDimocarpus longant0
- Treatment
- 0.1-1.0 mmol·L-1 of exogenous salicylic acide1
- Outcome
- malondialdedyde contente0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“and decreased the malondialdedyde content.”
t0“longan seedlings”
e1“Applying 0.1-1.0 mmol·L-1 of exogenous salicylic acid”
Claim · model-written summary
At 0.5 mmol·L-1 salicylic acid, SOD activity improved by 144%.
- Taxon
- longanDimocarpus longant0
- Treatment
- 0.5 mmol·L-1 of salicylic acide0
- Outcome
- SODe0
- Direction
- improvede0
- Value
- 144%e0
- Comparator
- acid rain stress alonee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“applying 0.5 mmol·L-1 of salicylic acid improved the SOD,POD,and CAT activities by 144%,440%,and 132%”
e1“As compared with the acid rain stress alone”
t0“longan seedlings”
Claim · model-written summary
At 0.5 mmol·L-1 salicylic acid, POD activity improved by 440%.
- Taxon
- longanDimocarpus longant0
- Treatment
- 0.5 mmol·L-1 of salicylic acide0
- Outcome
- PODe0
- Direction
- improvede0
- Value
- 440%e0
- Comparator
- acid rain stress alonee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“applying 0.5 mmol·L-1 of salicylic acid improved the SOD,POD,and CAT activities by 144%,440%,and 132%”
e1“As compared with the acid rain stress alone”
t0“longan seedlings”
Claim · model-written summary
At 0.5 mmol·L-1 salicylic acid, CAT activity improved by 132%.
- Taxon
- longanDimocarpus longant0
- Treatment
- 0.5 mmol·L-1 of salicylic acide0
- Outcome
- CATe0
- Direction
- improvede0
- Value
- 132%e0
- Comparator
- acid rain stress alonee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“applying 0.5 mmol·L-1 of salicylic acid improved the SOD,POD,and CAT activities by 144%,440%,and 132%”
e1“As compared with the acid rain stress alone”
t0“longan seedlings”
Claim · model-written summary
At 0.5 mmol·L-1 salicylic acid, total chlorophyll increased by 62%.
- Taxon
- longanDimocarpus longant0
- Treatment
- 0.5 mmol·L-1 of salicylic acide1
- Outcome
- total chlorophylle0
- Direction
- increasede0
- Value
- 62%e0
- Comparator
- acid rain stress alonee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased the total chlorophyll,soluble protein,and soluble sugar contents by 62%,105%,and 177%”
e1“applying 0.5 mmol·L-1 of salicylic acid”
e2“As compared with the acid rain stress alone”
t0“longan seedlings”
Claim · model-written summary
At 0.5 mmol·L-1 salicylic acid, soluble protein increased by 105%.
- Taxon
- longanDimocarpus longant0
- Treatment
- 0.5 mmol·L-1 of salicylic acide1
- Outcome
- soluble proteine0
- Direction
- increasede0
- Value
- 105%e0
- Comparator
- acid rain stress alonee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased the total chlorophyll,soluble protein,and soluble sugar contents by 62%,105%,and 177%”
e1“applying 0.5 mmol·L-1 of salicylic acid”
e2“As compared with the acid rain stress alone”
t0“longan seedlings”
Claim · model-written summary
At 0.5 mmol·L-1 salicylic acid, soluble sugar increased by 177%.
- Taxon
- longanDimocarpus longant0
- Treatment
- 0.5 mmol·L-1 of salicylic acide1
- Outcome
- soluble sugar contentse0
- Direction
- increasede0
- Value
- 177%e0
- Comparator
- acid rain stress alonee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased the total chlorophyll,soluble protein,and soluble sugar contents by 62%,105%,and 177%”
e1“applying 0.5 mmol·L-1 of salicylic acid”
e2“As compared with the acid rain stress alone”
t0“longan seedlings”
Claim · model-written summary
At 0.5 mmol·L-1 salicylic acid, malondialdedyde decreased by 35%.
- Taxon
- longanDimocarpus longant0
- Treatment
- 0.5 mmol·L-1 of salicylic acide1
- Outcome
- malondialdedyde contente0
- Direction
- decreasede0
- Value
- 35%e0
- Comparator
- acid rain stress alonee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“decreased the malondialdedyde content by 35%”
e1“applying 0.5 mmol·L-1 of salicylic acid”
e2“As compared with the acid rain stress alone”
t0“longan seedlings”
Claim · model-written summary
The 2.0 mmol·L-1 salicylic acid concentration lowered mitigation of acid rain damage.
- Taxon
- longanDimocarpus longant0
- Treatment
- exogenous salicylic acid(2.0 mmol·L-1)e0
- Outcome
- mitigation effecte0
- Direction
- lowerede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“high concentration of exogenous salicylic acid(2.0 mmol·L-1) lowered the mitigation effect”
t0“longan seedlings”
The same questions in other papers
salicylic acid · physiology: antioxidant enzymes · Dimocarpus longan (longan)Results agree
1 paper in the same direction as this paper
- positive
rainfall · physiology: antioxidant enzymes · Dimocarpus longan (longan)Results agree
2 papers in the same direction as this paper
- negative
- negative
rainfall · molecular: metabolites · Dimocarpus longan (longan)Results agree
3 papers in the same direction as this paper
- negative
- negative
- negative
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.