Abstract
Effect of external copper on enzyme activity in a soil and apple tree system was studied by using cinnamon soil and ^Fuji^ apple young tree. The results showed that perioxidase, PPO and ascorbic acid oxidase activity in the leaves and perioxidase activity in the roots were reinforced at low external copper levels and reduced at high. Adding Ca of Fe at high copper levels could mitigate copper toxicity in some degree. A significant curuilinear correlation was observed between soil perioxidase activity and the external copper concentration (y = x/(-11.26 + 0.75x), r = 2.95/(1 + 0.57exp(-5.02 * 10~(-5)x)), r = -0.9820~(**)). Urease was very sensitive to copper and it lost activity at levels > Cu100.
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Claims 6
Claim · model-written summary
Low external copper reinforced leaf peroxidase, PPO and ascorbic acid oxidase activities; high copper reduced them.
- Taxon
- apple
Malus domesticae0 - Organ / stage
- leavese1
- Treatment
- external coppere1
- Outcome
- perioxidase, PPO and ascorbic acid oxidase activity in the leavese1
- Direction
- reinforcede1
- Comparator
- low external copper levelse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“apple young tree”
e1“perioxidase, PPO and ascorbic acid oxidase activity in the leaves and perioxidase activity in the roots were reinforced at low external copper levels and reduced at high.”
Claim · model-written summary
Low external copper reinforced root peroxidase activity; high copper reduced it.
- Taxon
- appleMalus domesticae0
- Organ / stage
- rootse1
- Treatment
- external coppere1
- Outcome
- perioxidase activity in the rootse1
- Direction
- reinforcede1
- Comparator
- low external copper levelse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“apple young tree”
e1“perioxidase, PPO and ascorbic acid oxidase activity in the leaves and perioxidase activity in the roots were reinforced at low external copper levels and reduced at high.”
Claim · model-written summary
Adding calcium at high copper levels partly mitigated copper toxicity.
- Taxon
- appleMalus domesticae0
- Treatment
- Cae1
- Outcome
- copper toxicitye1
- Direction
- mitigatee1
- Qualifier
- in some degreee1
- Comparator
- high copper levelse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“apple young tree”
e1“Adding Ca of Fe at high copper levels could mitigate copper toxicity in some degree.”
Claim · model-written summary
Adding iron at high copper levels partly mitigated copper toxicity.
- Taxon
- appleMalus domesticae0
- Treatment
- Fee1
- Outcome
- copper toxicitye1
- Direction
- mitigatee1
- Comparator
- high copper levelse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“apple young tree”
e1“Adding Ca of Fe at high copper levels could mitigate copper toxicity in some degree.”
Claim · model-written summary
Soil peroxidase activity showed a significant curvilinear correlation with external copper concentration.
- Taxon
- appleMalus domesticae0
- Treatment
- external copper concentratione1
- Outcome
- soil perioxidase activitye1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“apple young tree”
e1“A significant curuilinear correlation was observed between soil perioxidase activity and the external copper concentration”
Claim · model-written summary
Soil urease was very sensitive to copper and lost activity above Cu100.
- Taxon
- appleMalus domesticae0
- Treatment
- coppere1
- Outcome
- Ureasee1
- Direction
- lost activitye1
- Qualifier
- levels > Cu100e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“apple young tree”
e1“Urease was very sensitive to copper and it lost activity at levels > Cu100.”
The same questions in other papers
iron atom · pest · Malus domestica (apple)Positive and negative results
1 in the opposite direction
- negative
calcium atom · pest · Malus domestica (apple)Positive and negative results
2 papers in the same direction as this paper · 2 in the opposite direction
- no effect
- no effect
- positive
1 paper more in this group
See all 5 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.