Abstract
Sunflower can be used for the remediation of metal-contaminated soils. Its high biomass production makes this plant species interestingfor phytoextraction and using sunflower oil for a technical purpose may improve the economic balance of phytoremediation. The aim of the present field study was to screen 15 commercial cultivars of Helianthus annuus L. grown on metal-contaminated soil, to find out the variety with the highest metal extraction, which can be further improved by mutation or in vitro breeding procedures. Two different fertilizers (ammonium sulphate and ammonium nitrate) were also used to enhance the bioavailability of metals in soil Highly significant differences were observed within tested varieties for metal accumulation and extraction efficiency. Furthermore, ammonium nitrate increased cadmium extraction, whereas ammonium sulphate enhanced zinc and lead uptake in most tested cultivars. In this field-based sunflower screening, we found enhanced cumulative Cd, Zn, and Pb extraction efficiency by a factor 4.4 for Salut cultivar. We therefore emphasize that prior to any classical breeding or genetic engineering enhancing metal uptake potential, a careful screening of various genotypes should be done to select the cultivar with the naturally highest metal uptake and to start the genetic improvement with the best available plant material.
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Claims 5
Claim · model-written summary
Sunflower cultivars differed significantly in metal accumulation and extraction efficiency in the field
- Taxon
- sunflower
Helianthus annuust0 - Material
- 15 commercial cultivarse5
- Outcome
- metal accumulation and extraction efficiencye1
- Qualifier
- within tested varietiese1
- Setting
- fielde5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Screening of sunflower cultivars”
e5“The aim of the present field study was to screen 15 commercial cultivars of Helianthus annuus L. grown on metal-contaminated soil”
e1“Highly significant differences were observed within tested varieties for metal accumulation and extraction efficiency”
Claim · model-written summary
Ammonium nitrate increased cadmium extraction in sunflower
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- ammonium nitratee2
- Outcome
- cadmium extractione2
- Direction
- increasede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Screening of sunflower cultivars”
e2“ammonium nitrate increased cadmium extraction, whereas ammonium sulphate enhanced zinc and lead uptake in most tested cultivars”
Claim · model-written summary
Ammonium sulphate enhanced zinc and lead uptake in most tested cultivars
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- ammonium sulphatee2
- Outcome
- zinc and lead uptakee2
- Direction
- enhancede2
- Qualifier
- in most tested cultivarse2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Screening of sunflower cultivars”
e2“ammonium nitrate increased cadmium extraction, whereas ammonium sulphate enhanced zinc and lead uptake in most tested cultivars”
Claim · model-written summary
Salut cultivar enhanced cumulative Cd, Zn and Pb extraction efficiency by a factor 4.4
- Taxon
- sunflowerHelianthus annuust0
- Material
- Salute3
- Outcome
- cumulative Cd, Zn, and Pb extraction efficiencye3
- Direction
- enhancede3
- Value
- a factor 4.4e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Screening of sunflower cultivars”
e3“we found enhanced cumulative Cd, Zn, and Pb extraction efficiency by a factor 4.4 for Salut cultivar”
Claim · model-written summary
Careful screening of various genotypes should precede classical breeding or genetic engineering for metal uptake
- Taxon
- sunflowerHelianthus annuust0
- Outcome
- a careful screening of various genotypese4
- Qualifier
- prior to any classical breeding or genetic engineering enhancing metal uptake potentiale4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Screening of sunflower cultivars”
e4“prior to any classical breeding or genetic engineering enhancing metal uptake potential, a careful screening of various genotypes should be done to select the cultivar with the naturally highest metal uptake”
The same questions in other papers
ammonium nitrate · nutrient: content · Helianthus annuus (common sunflower)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
- no effect
ammonium sulfate · nutrient: content · Helianthus annuus (common sunflower)Results agree
2 papers in the same direction as this paper
- positive
- positive
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.