Abstract
The effects of salicylic acid (SA) on the activity of total peroxidase and the patterns of isoperoxidases of cultured tobacco cells were investigated. The total peroxidase activity of tobacco cells was inhibited by 70% when the cells were treated with 5 mM SA for one week. The peroxidase activity of tobacco cells is declined by 90% in the presence of 30 mM SA. Moreover, the activity of isoperoxidases C3, A1, and A3 decreased dramatically with increasing SA concentration, while, one of the anodic isoperoxidases, A2, was somewhat resistant to SA treatment. When isoperoxidase C3 was isolated, SA inhibited the activity of purified C3 in a concentration-dependent manner. The IC50 of isoperoxidase C3 was approximately 0.45 mM. However, the inhibition of isoperoxidase C3 activity was removed by the addition of Fe2+ ion. The possible mechanism of inhibition of peroxidase by SA is discussed.
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Claims 7
Claim · model-written summary
5 mM SA for one week inhibited total peroxidase activity in tobacco cells by 70%.
- Taxon
- tobacco
Nicotiana tabacume0 - Treatment
- 5 mM SA for one weeke0
- Outcome
- total peroxidase activitye0
- Direction
- inhibitede0
- Value
- 70%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The total peroxidase activity of tobacco cells was inhibited by 70% when the cells were treated with 5 mM SA for one week”
Claim · model-written summary
30 mM SA reduced tobacco cell peroxidase activity by 90%.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- 30 mM SAe0
- Outcome
- peroxidase activitye0
- Direction
- declinede0
- Value
- 90%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The peroxidase activity of tobacco cells is declined by 90% in the presence of 30 mM SA”
Claim · model-written summary
Activities of C3, A1, and A3 decreased as SA concentration increased.
- Taxon
- tobaccoNicotiana tabacume1
- Treatment
- SA concentratione0
- Gene
- isoperoxidases C3, A1, and A3e0
- Outcome
- activity of isoperoxidases C3, A1, and A3e0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“cultured tobacco cells”
e0“the activity of isoperoxidases C3, A1, and A3 decreased dramatically with increasing SA concentration”
Claim · model-written summary
Isoperoxidase A2 was somewhat resistant to SA treatment.
Not reportedTaxon
Verbatim
e0“one of the anodic isoperoxidases, A2, was somewhat resistant to SA treatment”
t0“Isoperoxidases”
Claim · model-written summary
SA inhibited purified C3 activity in a concentration-dependent manner.
Not reportedTaxonComparator
Verbatim
e0“SA inhibited the activity of purified C3 in a concentration-dependent manner”
Claim · model-written summary
The IC50 of isoperoxidase C3 was approximately 0.45 mM.
Not reportedTaxon
Verbatim
e0“The IC50 of isoperoxidase C3 was approximately 0.45 mM”
Claim · model-written summary
Fe2+ addition removed SA inhibition of isoperoxidase C3 activity.
- Treatment
- addition of Fe2+ ione0
- Gene
- isoperoxidase C3e0
- Outcome
- inhibition of isoperoxidase C3 activitye0
- Direction
- removede0
Not reportedTaxonComparator
Verbatim
e0“the inhibition of isoperoxidase C3 activity was removed by the addition of Fe2+ ion”
The same questions in other papers
salicylic acid · physiology: antioxidant enzymes · Nicotiana tabacum (tobacco)Results differ
1 paper in the same direction as this paper · 7 in the opposite direction
- positive
- positive
- positive
5 papers more in this group
See all 9 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.