Abstract
In order to explore the mechanism that spermidine( Spd) improves soybean seedlings resistance to salt stress,takeing Zhengdou 30 as material,we studied the effects of Spd with different concentration on photosynthetic character and antioxidant metabolism of soybean seedling leaves under salt stress( 100 mmol·L~(-1)Na Cl). The results are as follows: under salt stress,the relative drought matter increase rate( RDMTR),the activity of antioxidant enzymes( superoxide dismutase: SOD,peroxidase: POD,catalase: CAT,and ascorbic acid oxidase : APX) and photosynthetic parameters( net photosynthetic rate:Pn,stomatal conductance: Gs,intercellular CO_2concentration: Ci,transpiration rate: Tr) of soybean seedling leaves significantly decreased,however,relative electrolyte leakage rate( RELR),superoxide anion generation rate( O~-_2·),hydrogen peroxide( H_2O_2) and malondialdehyde( MDA) contents increased. But,exogenous Spd with different concentration increased RDMIR,the activity of antioxidant enzymes and photosynthetic parameters of soybean seedling leaves and decreased RELR,O~-_2·,H_2O_2 and MDA contents,and the increases or decreases are markedly at 0. 5mmol·L~(-1)Spd concentration. These results suggest that the appropriate concentration of Spd could decrease O~-_2· generation rate and the contents of H_2O_2 and MDA via increasing the activities of antioxidant enzymes in soybean seedlings and increase photosynthetic efficiency via improving photosynthetic parameters to alleviate the injury of salt stress to soybean seedlings and promote the growth of soybean seedlings.
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Claims 8
Claim · model-written summary
Salt stress significantly decreased relative dry matter increase rate in soybean leaves.
- Taxon
- soybean
Glycine maxe0 - Organ / stage
- seedling leavese0
- Treatment
- salt stresse0
- Outcome
- relative drought matter increase ratee0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“under salt stress,the relative drought matter increase rate( RDMTR),the activity of antioxidant enzymes( superoxide dismutase: SOD,peroxidase: POD,catalase: CAT,and ascorbic acid oxidase : APX) and photosynthetic parameters( net photosynthetic rate:Pn,stomatal conductance: Gs,intercellular CO_2concentration: Ci,transpiration rate: Tr) of soybean seedling leaves significantly decreased”
Claim · model-written summary
Salt stress significantly decreased antioxidant enzyme activity in soybean seedling leaves.
- Taxon
- soybeanGlycine maxe0
- Organ / stage
- seedling leavese0
- Treatment
- salt stresst0
- Outcome
- activity of antioxidant enzymese0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the activity of antioxidant enzymes( superoxide dismutase: SOD,peroxidase: POD,catalase: CAT,and ascorbic acid oxidase : APX) and photosynthetic parameters( net photosynthetic rate:Pn,stomatal conductance: Gs,intercellular CO_2concentration: Ci,transpiration rate: Tr) of soybean seedling leaves significantly decreased”
t0“Salt Stress”
Claim · model-written summary
Salt stress significantly decreased photosynthetic parameters in soybean seedling leaves.
- Taxon
- soybeanGlycine maxe0
- Organ / stage
- seedling leavese0
- Treatment
- Salt Stresst0
- Outcome
- photosynthetic parameterse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“photosynthetic parameters( net photosynthetic rate:Pn,stomatal conductance: Gs,intercellular CO_2concentration: Ci,transpiration rate: Tr) of soybean seedling leaves significantly decreased”
t0“Salt Stress”
Claim · model-written summary
Salt stress increased relative electrolyte leakage, superoxide generation, hydrogen peroxide, and malondialdehyde.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- Salt Stresst0
- Outcome
- relative electrolyte leakage rate( RELR),superoxide anion generation rate( O~-_2·),hydrogen peroxide( H_2O_2) and malondialdehyde( MDA) contentse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“relative electrolyte leakage rate( RELR),superoxide anion generation rate( O~-_2·),hydrogen peroxide( H_2O_2) and malondialdehyde( MDA) contents increased.”
t0“Soybean Seedling Leaves under Salt Stress”
Claim · model-written summary
Exogenous spermidine increased relative dry matter increase rate in salt-stressed soybean.
- Taxon
- soybeanGlycine maxe0
- Treatment
- exogenous Spde0
- Outcome
- RDMIRe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exogenous Spd with different concentration increased RDMIR,the activity of antioxidant enzymes and photosynthetic parameters of soybean seedling leaves”
Claim · model-written summary
Exogenous spermidine increased antioxidant enzyme activity and photosynthetic parameters.
- Taxon
- soybeanGlycine maxe0
- Treatment
- exogenous Spde0
- Outcome
- activity of antioxidant enzymes and photosynthetic parameterse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exogenous Spd with different concentration increased RDMIR,the activity of antioxidant enzymes and photosynthetic parameters of soybean seedling leaves”
Claim · model-written summary
Exogenous spermidine decreased electrolyte leakage, superoxide generation, hydrogen peroxide and malondialdehyde.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- Spde0
- Outcome
- RELR,O~-_2·,H_2O_2 and MDA contentse0
- Direction
- decreasede0
- Qualifier
- 0. 5mmol·L~(-1)Spd concentratione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“decreased RELR,O~-_2·,H_2O_2 and MDA contents,and the increases or decreases are markedly at 0. 5mmol·L~(-1)Spd concentration.”
t0“Soybean”
Claim · model-written summary
The authors propose that spermidine reduces oxidative injury through antioxidant enzymes and improves photosynthetic efficiency.
- Taxon
- soybeanGlycine maxe0
- Treatment
- Spde0
- Outcome
- photosynthetic efficiencye0
- Qualifier
- via improving photosynthetic parameterse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“appropriate concentration of Spd could decrease O~-_2· generation rate and the contents of H_2O_2 and MDA via increasing the activities of antioxidant enzymes in soybean seedlings and increase photosynthetic efficiency via improving photosynthetic parameters”
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