Abstract
The role of superoxide dismutase (SOD) in defense against SO2 toxicity was investigated using leaves of poplar and spinach. Young poplar leaves having five times the SOD of the old leaves were more resistant to the toxicity of SO2. Spraying spinach leaves with diethyldithiocarbamate caused a marked loss of SOD activity which resulted in a decrease in their resistance to the toxic effects of SO2. The SOD activity in poplar leaves was increased by fumigation with 0.1 ppm SO2, and this was more evident in young leaves than in old ones. The increased SOD activity was inhibited by cyanide. The poplar leaves having high SOD activity induced with SO2 fumigation were more resistant to 2.0 ppm SO2 than the control leaves. These findings suggest that SO2 toxicity is in part due to the superoxide radical and that SOD participates in the defense mechanism against SO2 toxicity.
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Claims 8
Claim · model-written summary
Young poplar leaves with five times the SOD of old leaves were more resistant to SO2 toxicity.
- Organ / stage
- Young poplar leavese1
- Outcome
- the toxicity of SO2e1
- Direction
- more resistante1
- Value
- five timese1
- Comparator
- the old leavese1
PopulusOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Young poplar leaves having five times the SOD of the old leaves were more resistant to the toxicity of SO2”
Claim · model-written summary
Spraying spinach leaves with diethyldithiocarbamate reduced SOD activity.
- Taxon
- spinach
Spinacia oleraceae2 - Treatment
- diethyldithiocarbamatee2
- Outcome
- SOD activitye2
- Direction
- losse2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Spraying spinach leaves with diethyldithiocarbamate caused a marked loss of SOD activity which resulted in a decrease in their resistance to the toxic effects of SO2”
Claim · model-written summary
Diethyldithiocarbamate treatment decreased the resistance of spinach leaves to the toxic effects of SO2.
- Taxon
- spinachSpinacia oleraceae2
- Treatment
- diethyldithiocarbamatee2
- Outcome
- resistance to the toxic effects of SO2e2
- Direction
- decreasee2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Spraying spinach leaves with diethyldithiocarbamate caused a marked loss of SOD activity which resulted in a decrease in their resistance to the toxic effects of SO2”
Claim · model-written summary
Fumigation with 0.1 ppm SO2 increased SOD activity in poplar leaves.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“The SOD activity in poplar leaves was increased by fumigation with 0.1 ppm SO2, and this was more evident in young leaves than in old ones”
Claim · model-written summary
The SO2-induced increase in SOD activity was more evident in young poplar leaves than in old leaves.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“The SOD activity in poplar leaves was increased by fumigation with 0.1 ppm SO2, and this was more evident in young leaves than in old ones”
Claim · model-written summary
Cyanide inhibited the increase in SOD activity in poplar leaves.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“The SOD activity in poplar leaves was increased by fumigation with 0.1 ppm SO2, and this was more evident in young leaves than in old ones”
e4“The increased SOD activity was inhibited by cyanide”
Claim · model-written summary
Poplar leaves with SO2-induced high SOD activity were more resistant to 2.0 ppm SO2 than control leaves.
- Treatment
- SO2 fumigatione5
- Outcome
- resistant to 2.0 ppm SO2e5
- Direction
- more resistante5
- Comparator
- the control leavese5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“The poplar leaves having high SOD activity induced with SO2 fumigation were more resistant to 2.0 ppm SO2 than the control leaves”
Claim · model-written summary
SO2 toxicity is suggested to be partly due to the superoxide radical, and SOD participates in defense against it.
- Gene
- SODe6
- Compound
- superoxide radicale6
- Outcome
- SO2 toxicitye6
- Qualifier
- in part due to the superoxide radicale6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The role of superoxide dismutase (SOD) in defense against SO2 toxicity was investigated using leaves of poplar and spinach”
e6“These findings suggest that SO2 toxicity is in part due to the superoxide radical and that SOD participates in the defense mechanism against SO2 toxicity”
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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.