Abstract
'Morden' sunflower (Helianthus annuus L.) was grown in refined sand at a copper supply ranging from acute deficiency (0.00065 mg/litre) to excess (6.5 mg/litre) to study the effect of variable copper on growth, biomass,oil yield,etc. The oil content in seeds was highest at 0.065 mg Cu/litre and compared to this, it decreased more in deficiency (<0,065 mg/litre) than in excess of copper (6.5 mg/litre). High copper also reduced the biomass, total seed weight and the activities of polyphenol oxidase, ascorbic acid oxidase and cytochrome C oxidase in leaves. In sunflower, low copper (<0.065 mg Cu/litre) induced the characteristic visible deficiency symptoms and drastically reduced the growth. biomass and seea yield accompanied 'by 'lOW sugar concentratiOn and 'lowered activities Of polyphenol oxidase. ascorbic acid oxidase and cytochrome C oxidase in leaves
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Claims 10
Claim · model-written summary
Seed oil content was highest at 0.065 mg Cu/litre.
- Taxon
- sunflower
Helianthus annuuse0 - Treatment
- copper supplye0
- Outcome
- oil content in seedse1
- Direction
- higheste1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“'Morden' sunflower (Helianthus annuus L.) was grown in refined sand at a copper supply ranging from acute deficiency (0.00065 mg/litre) to excess (6.5 mg/litre)”
e1“The oil content in seeds was highest at 0.065 mg Cu/litre”
Claim · model-written summary
Seed oil content decreased more under copper deficiency than under excess copper.
- Taxon
- sunflowerHelianthus annuuse0
- Treatment
- deficiencye2
- Outcome
- oil content in seedse1
- Direction
- decreased moree2
- Comparator
- excess of copper (6.5 mg/litre)e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“'Morden' sunflower (Helianthus annuus L.) was grown in refined sand at a copper supply ranging from acute deficiency (0.00065 mg/litre) to excess (6.5 mg/litre)”
e1“The oil content in seeds was highest at 0.065 mg Cu/litre”
e2“it decreased more in deficiency (<0,065 mg/litre) than in excess of copper (6.5 mg/litre)”
Claim · model-written summary
High copper reduced sunflower biomass.
- Taxon
- sunflowerHelianthus annuuse0
- Treatment
- High coppere3
- Outcome
- biomasse3
- Direction
- reducede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“'Morden' sunflower (Helianthus annuus L.) was grown in refined sand at a copper supply ranging from acute deficiency (0.00065 mg/litre) to excess (6.5 mg/litre)”
e3“High copper also reduced the biomass, total seed weight and the activities of polyphenol oxidase, ascorbic acid oxidase and cytochrome C oxidase in leaves”
Claim · model-written summary
High copper reduced total seed weight.
- Taxon
- sunflowerHelianthus annuuse0
- Treatment
- High coppere3
- Outcome
- total seed weighte3
- Direction
- reducede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“'Morden' sunflower (Helianthus annuus L.) was grown in refined sand at a copper supply ranging from acute deficiency (0.00065 mg/litre) to excess (6.5 mg/litre)”
e3“High copper also reduced the biomass, total seed weight and the activities of polyphenol oxidase, ascorbic acid oxidase and cytochrome C oxidase in leaves”
Claim · model-written summary
High copper reduced leaf activities of polyphenol oxidase, ascorbic acid oxidase and cytochrome C oxidase.
- Taxon
- sunflowerHelianthus annuuse0
- Organ / stage
- leavese3
- Treatment
- High coppere3
- Outcome
- the activities of polyphenol oxidase, ascorbic acid oxidase and cytochrome C oxidasee3
- Direction
- reducede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“'Morden' sunflower (Helianthus annuus L.) was grown in refined sand at a copper supply ranging from acute deficiency (0.00065 mg/litre) to excess (6.5 mg/litre)”
e3“High copper also reduced the biomass, total seed weight and the activities of polyphenol oxidase, ascorbic acid oxidase and cytochrome C oxidase in leaves”
Claim · model-written summary
Low copper induced characteristic visible deficiency symptoms in sunflower.
- Taxon
- sunflowerHelianthus annuuse0
- Treatment
- low copper (<0.065 mg Cu/litre)e4
- Outcome
- characteristic visible deficiency symptomse4
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“'Morden' sunflower (Helianthus annuus L.) was grown in refined sand at a copper supply ranging from acute deficiency (0.00065 mg/litre) to excess (6.5 mg/litre)”
e4“low copper (<0.065 mg Cu/litre) induced the characteristic visible deficiency symptoms and drastically reduced the growth”
Claim · model-written summary
Low copper drastically reduced sunflower growth.
- Taxon
- sunflowerHelianthus annuuse0
- Treatment
- low copper (<0.065 mg Cu/litre)e4
- Outcome
- growthe4
- Direction
- drastically reducede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“'Morden' sunflower (Helianthus annuus L.) was grown in refined sand at a copper supply ranging from acute deficiency (0.00065 mg/litre) to excess (6.5 mg/litre)”
e4“low copper (<0.065 mg Cu/litre) induced the characteristic visible deficiency symptoms and drastically reduced the growth”
Claim · model-written summary
Low copper drastically reduced biomass and seed yield.
- Taxon
- sunflowerHelianthus annuuse0
- Treatment
- low copper (<0.065 mg Cu/litre)e4
- Outcome
- biomass and seea yielde5
- Direction
- drastically reducede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“'Morden' sunflower (Helianthus annuus L.) was grown in refined sand at a copper supply ranging from acute deficiency (0.00065 mg/litre) to excess (6.5 mg/litre)”
e4“low copper (<0.065 mg Cu/litre) induced the characteristic visible deficiency symptoms and drastically reduced the growth”
e5“drastically reduced the growth. biomass and seea yield accompanied 'by 'lOW sugar concentratiOn”
Claim · model-written summary
Low copper was accompanied by low sugar concentration in sunflower.
- Taxon
- sunflowerHelianthus annuuse0
- Treatment
- low copper (<0.065 mg Cu/litre)e4
- Outcome
- sugar concentratiOne5
- Direction
- lOWe5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“'Morden' sunflower (Helianthus annuus L.) was grown in refined sand at a copper supply ranging from acute deficiency (0.00065 mg/litre) to excess (6.5 mg/litre)”
e4“low copper (<0.065 mg Cu/litre) induced the characteristic visible deficiency symptoms and drastically reduced the growth”
e5“drastically reduced the growth. biomass and seea yield accompanied 'by 'lOW sugar concentratiOn”
Claim · model-written summary
Low copper lowered leaf activities of polyphenol oxidase, ascorbic acid oxidase and cytochrome C oxidase.
- Taxon
- sunflowerHelianthus annuuse0
- Organ / stage
- leavese6
- Treatment
- low copper (<0.065 mg Cu/litre)e4
- Outcome
- activities Of polyphenol oxidase. ascorbic acid oxidase and cytochrome C oxidasee6
- Direction
- lowerede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“'Morden' sunflower (Helianthus annuus L.) was grown in refined sand at a copper supply ranging from acute deficiency (0.00065 mg/litre) to excess (6.5 mg/litre)”
e4“low copper (<0.065 mg Cu/litre) induced the characteristic visible deficiency symptoms and drastically reduced the growth”
e6“'lowered activities Of polyphenol oxidase. ascorbic acid oxidase and cytochrome C oxidase in leaves”
The same questions in other papers
copper atom · growth · Helianthus annuus (common sunflower)Results differ
5 papers in the same direction as this paper
- negative
- no effect
- negative
2 papers more in this group
See all 6 papers →copper atom · quality: oil · Helianthus annuus (common sunflower)Positive and negative results
1 in the opposite direction
- no effect
copper atom · physiology: antioxidant enzymes · Helianthus annuus (common sunflower)Positive and negative results
2 in the opposite direction
- positive
- positive
copper atom · disease · Helianthus annuus (common sunflower)Positive and negative results
2 in the opposite direction
- positive
- positive
copper atom · yield · Helianthus annuus (common sunflower)Results agree
1 paper in the same direction as this paper
- no effect
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.