Abstract
Nitric oxide( NO) and hydrogen peroxide( H2O2) are key signaling molecules in plants. In recent years,the roles of the two compounds in the tolerance of plants to abiotic stress has received much attention,and increasing evidence indicates that NO and H2O2 play essential roles in aluminum( Al) tolerance. However,the physiological mechanism by which NO and H2O2 alleviate Al toxicity in soybean and their interactions remain unknown. In the present study,we examined the effect of Al on endogenous NO and H2O2 accumulation,the role of exogenous NO and H2O2 in Al tolerance,and enzyme activity related to NO and H2O2 accumulation in soybean root apices. Root elongation and Al content in root tips were used as indicators to detect the effects of NO and H2O2. Al concentration of50 or 100 μmolL significantly inhibited root growth,increased Al accumulation in root tips,and promoted endogenous NO production.Treatments with H2O2+ Al,sodium nitroprusside SNP + Al,or H2O2+ SNP + Al increased relative root length by 64. 6%,63. 5% and69. 5%,respectively,and decreased Al content in the root tips by 34. 6%,36. 8% and 32. 9%,respectively. This showed that an exogenous NO donor SNP and H2O2 both alleviated Al-induced root growth inhibition and Al accumulation in the root apex. Moreover,exogenous NO increased endogenous H2O2 accumulation and decreased peroxidase activity,whereas exogenous H2O2 had no significant effect on endogenous NO production. Collectively,the results showed that NO and H2O2 exhibited a synergistic effect on alleviating Al toxicity in soybean,and NO acted upstream of H2O2 in the signaling pathway through the increment of peroxidasedependent H2O2 accumulation.
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Claims 14
Claim · model-written summary
Al at 50 or 100 μmolL significantly inhibited root growth.
- Taxon
- Soybean
Glycine maxt0 - Treatment
- Al concentration of50 or 100 μmolLe0
- Outcome
- root growthe0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean Seedlings”
e0“Al concentration of50 or 100 μmolL significantly inhibited root growth”
Claim · model-written summary
Al increased accumulation in root tips.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- Al concentration of50 or 100 μmolLe0
- Outcome
- Al accumulation in root tipse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean Seedlings”
e0“Al concentration of50 or 100 μmolL significantly inhibited root growth,increased Al accumulation in root tips”
Claim · model-written summary
Al promoted endogenous NO production.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- Al concentration of50 or 100 μmolLe0
- Outcome
- endogenous NO productione0
- Direction
- promotede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean Seedlings”
e0“Al concentration of50 or 100 μmolL significantly inhibited root growth,increased Al accumulation in root tips,and promoted endogenous NO production”
Claim · model-written summary
H2O2 with Al increased relative root length by 64. 6%.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- H2O2+ Ale0
- Outcome
- relative root lengthe0
- Direction
- increasede0
- Value
- 64. 6%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean Seedlings”
e0“Treatments with H2O2+ Al,sodium nitroprusside SNP + Al,or H2O2+ SNP + Al increased relative root length by 64. 6%,63. 5% and69. 5%,respectively”
Claim · model-written summary
SNP with Al increased relative root length by 63. 5%.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- sodium nitroprusside SNP + Ale0
- Outcome
- relative root lengthe0
- Direction
- increasede0
- Value
- 63. 5%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean Seedlings”
e0“Treatments with H2O2+ Al,sodium nitroprusside SNP + Al,or H2O2+ SNP + Al increased relative root length by 64. 6%,63. 5% and69. 5%,respectively”
Claim · model-written summary
H2O2 plus SNP plus Al increased relative root length by 69. 5%.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- H2O2+ SNP + Ale0
- Outcome
- relative root lengthe0
- Direction
- increasede0
- Value
- 69. 5%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean Seedlings”
e0“Treatments with H2O2+ Al,sodium nitroprusside SNP + Al,or H2O2+ SNP + Al increased relative root length by 64. 6%,63. 5% and69. 5%,respectively”
Claim · model-written summary
H2O2 with Al decreased root-tip Al content by 34. 6%.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- H2O2+ Ale1
- Outcome
- Al content in the root tipse0
- Direction
- decreasede0
- Value
- 34. 6%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean Seedlings”
e0“decreased Al content in the root tips by 34. 6%,36. 8% and 32. 9%,respectively”
e1“Treatments with H2O2+ Al,sodium nitroprusside SNP + Al,or H2O2+ SNP + Al”
Claim · model-written summary
SNP with Al decreased root-tip Al content by 36. 8%.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- sodium nitroprusside SNP + Ale1
- Outcome
- Al content in the root tipse0
- Direction
- decreasede0
- Value
- 36. 8%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean Seedlings”
e0“decreased Al content in the root tips by 34. 6%,36. 8% and 32. 9%,respectively”
e1“sodium nitroprusside SNP + Al”
Claim · model-written summary
H2O2 plus SNP plus Al decreased root-tip Al content by 32. 9%.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- H2O2+ SNP + Ale1
- Outcome
- Al content in the root tipse0
- Direction
- decreasede0
- Value
- 32. 9%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean Seedlings”
e0“decreased Al content in the root tips by 34. 6%,36. 8% and 32. 9%,respectively”
e1“H2O2+ SNP + Al”
Claim · model-written summary
Exogenous NO increased endogenous H2O2 accumulation.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- exogenous NOe0
- Outcome
- endogenous H2O2 accumulatione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean Seedlings”
e0“exogenous NO increased endogenous H2O2 accumulation”
Claim · model-written summary
Exogenous NO decreased peroxidase activity.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- exogenous NOe0
- Outcome
- peroxidase activitye0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean Seedlings”
e0“exogenous NO increased endogenous H2O2 accumulation and decreased peroxidase activity”
Claim · model-written summary
Exogenous H2O2 had no significant effect on endogenous NO production.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- exogenous H2O2e0
- Outcome
- endogenous NO productione0
- Direction
- no significant effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean Seedlings”
e0“exogenous H2O2 had no significant effect on endogenous NO production”
Claim · model-written summary
NO and H2O2 were interpreted as synergistic in alleviating Al toxicity.
- Taxon
- soybeanGlycine maxe0
- Outcome
- alleviating Al toxicitye0
- Qualifier
- synergistic effecte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean Seedlings”
e0“NO and H2O2 exhibited a synergistic effect on alleviating Al toxicity in soybean”
Claim · model-written summary
NO was interpreted as upstream of H2O2 in the signaling pathway through peroxidase-dependent H2O2 accumulation.
- Taxon
- SoybeanGlycine maxt0
- Outcome
- H2O2 accumulatione0
- Qualifier
- upstream of H2O2 in the signaling pathwaye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean Seedlings”
e0“NO acted upstream of H2O2 in the signaling pathway through the increment of peroxidasedependent H2O2 accumulation”
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See all 14 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.