Abstract
Seeds of 5 sunflower cultivars viz., Nstt-160, Mehran-II, Hyssun-33, M-3260 and SF-187 were exposed to a range of nickel levels (0, 10, 20, 30, 40, 50 and 60 mg L -1 ) prepared in Hoagland’s nutrient solution. The low concentration (10 and 20 mg L -1 ) of nickel significantly promoted seed germination and improved early seedling growth while higher levels (40, 20 and 60 mg L -1 ) caused a significant inhibition in germination and resulted in a considerable delay to achieve 50% germination. Although, plumule and radicle length, and fresh and dry weights of germinating seeds were also improved at lower concentrations, they were significantly reduced in all cultivars at higher levels of nickel. Magnesium (Mg) contents in plumule and radicle also increased at lower levels of nickel but they were significantly reduced at higher Ni levels. However, plumule and radicle K contents consistently reduced with increasing concentration of Ni in the growth medium. The maximum nickel tolerance level in all cultivars appeared to be 40 mg L -1 at which all parameters were reduced more than 50%. Overall, cv. Hysun-33 was more tolerant whereas, Nust-160 the sensitive. All other cultivars were intermediate in nickel tolerance at the germination stage.
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Claims 15
Claim · model-written summary
Low nickel concentrations significantly promoted sunflower seed germination.
- Taxon
- SUNFLOWER
Helianthus annuust0 - Treatment
- 10 and 20 mg L -1e0
- Outcome
- seed germinatione0
- Direction
- promotede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The low concentration (10 and 20 mg L -1 ) of nickel significantly promoted seed germination”
t0“SUNFLOWER (HELIANTHUS ANNUUS L.)”
Claim · model-written summary
Low nickel concentrations improved early sunflower seedling growth.
- Taxon
- SUNFLOWERHelianthus annuust0
- Treatment
- 10 and 20 mg L -1e0
- Outcome
- early seedling growthe0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The low concentration (10 and 20 mg L -1 ) of nickel significantly promoted seed germination and improved early seedling growth”
t0“SUNFLOWER (HELIANTHUS ANNUUS L.)”
Claim · model-written summary
Higher nickel concentrations significantly inhibited sunflower germination.
- Taxon
- SUNFLOWERHelianthus annuust0
- Treatment
- higher levels (40, 20 and 60 mg L -1 )e0
- Outcome
- germinatione0
- Direction
- inhibitione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher levels (40, 20 and 60 mg L -1 ) caused a significant inhibition in germination”
t0“SUNFLOWER (HELIANTHUS ANNUUS L.)”
Claim · model-written summary
Higher nickel concentrations delayed sunflower 50% germination.
- Taxon
- SUNFLOWERHelianthus annuust0
- Treatment
- higher levels (40, 20 and 60 mg L -1 )e0
- Outcome
- achieve 50% germinatione0
- Direction
- delaye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher levels (40, 20 and 60 mg L -1 ) caused a significant inhibition in germination and resulted in a considerable delay to achieve 50% germination”
t0“SUNFLOWER (HELIANTHUS ANNUUS L.)”
Claim · model-written summary
Lower nickel concentrations improved plumule and radicle length and fresh weight.
- Taxon
- SUNFLOWERHelianthus annuust0
- Treatment
- lower concentrationse0
- Outcome
- plumule and radicle length, and freshe0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plumule and radicle length, and fresh and dry weights of germinating seeds were also improved at lower concentrations”
t0“SUNFLOWER (HELIANTHUS ANNUUS L.)”
Claim · model-written summary
Lower nickel concentrations improved dry weight of germinating sunflower seeds.
- Taxon
- SUNFLOWERHelianthus annuust0
- Treatment
- lower concentrationse0
- Outcome
- dry weights of germinating seedse0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“fresh and dry weights of germinating seeds were also improved at lower concentrations”
t0“SUNFLOWER (HELIANTHUS ANNUUS L.)”
Claim · model-written summary
Higher nickel concentrations significantly reduced plumule and radicle length and seed fresh weight.
- Taxon
- SUNFLOWERHelianthus annuust0
- Treatment
- higher levels of nickele0
- Outcome
- plumule and radicle length, and freshe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plumule and radicle length, and fresh and dry weights of germinating seeds were also improved at lower concentrations, they were significantly reduced in all cultivars at higher levels of nickel”
t0“SUNFLOWER (HELIANTHUS ANNUUS L.)”
Claim · model-written summary
Higher nickel concentrations significantly reduced seed dry weight.
- Taxon
- SUNFLOWERHelianthus annuust0
- Treatment
- higher levels of nickele0
- Outcome
- dry weights of germinating seedse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“fresh and dry weights of germinating seeds were also improved at lower concentrations, they were significantly reduced in all cultivars at higher levels of nickel”
t0“SUNFLOWER (HELIANTHUS ANNUUS L.)”
Claim · model-written summary
Lower nickel levels increased magnesium content in plumule and radicle.
- Taxon
- SUNFLOWERHelianthus annuust0
- Treatment
- lower levels of nickele0
- Outcome
- Magnesium (Mg) contents in plumule and radiclee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Magnesium (Mg) contents in plumule and radicle also increased at lower levels of nickel”
t0“SUNFLOWER (HELIANTHUS ANNUUS L.)”
Claim · model-written summary
Higher nickel levels significantly reduced magnesium content in plumule and radicle.
- Taxon
- SUNFLOWERHelianthus annuust0
- Treatment
- higher Ni levelse0
- Outcome
- Magnesium (Mg) contents in plumule and radiclee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Magnesium (Mg) contents in plumule and radicle also increased at lower levels of nickel but they were significantly reduced at higher Ni levels”
t0“SUNFLOWER (HELIANTHUS ANNUUS L.)”
Claim · model-written summary
Plumule and radicle K content declined with rising nickel concentration.
- Taxon
- SUNFLOWERHelianthus annuust0
- Treatment
- increasing concentration of Nie0
- Outcome
- plumule and radicle K contentse0
- Direction
- reducede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plumule and radicle K contents consistently reduced with increasing concentration of Ni in the growth medium”
t0“SUNFLOWER (HELIANTHUS ANNUUS L.)”
Claim · model-written summary
At 40 mg L -1 nickel, all measured parameters fell more than 50% in all cultivars.
- Taxon
- SUNFLOWERHelianthus annuust0
- Treatment
- 40 mg L -1e0
- Outcome
- all parameterse0
- Direction
- reducede0
- Value
- more than 50%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The maximum nickel tolerance level in all cultivars appeared to be 40 mg L -1 at which all parameters were reduced more than 50%”
t0“SUNFLOWER (HELIANTHUS ANNUUS L.)”
Claim · model-written summary
Hysun-33 was the most nickel tolerant cultivar.
- Taxon
- SUNFLOWERHelianthus annuust0
- Material
- Hysun-33e0
- Outcome
- more tolerante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cv. Hysun-33 was more tolerant whereas, Nust-160 the sensitive”
t0“SUNFLOWER (HELIANTHUS ANNUUS L.)”
Claim · model-written summary
Nust-160 was the nickel sensitive cultivar.
- Taxon
- SUNFLOWERHelianthus annuust0
- Material
- Nust-160e0
- Outcome
- the sensitivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cv. Hysun-33 was more tolerant whereas, Nust-160 the sensitive”
t0“SUNFLOWER (HELIANTHUS ANNUUS L.)”
Claim · model-written summary
Other cultivars had intermediate nickel tolerance at germination.
- Taxon
- SUNFLOWERHelianthus annuust0
- Material
- other cultivarse0
- Organ / stage
- germination stagee0
- Outcome
- intermediate in nickel tolerancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All other cultivars were intermediate in nickel tolerance at the germination stage”
t0“SUNFLOWER (HELIANTHUS ANNUUS L.)”
The same questions in other papers
nickel atom · nutrient: content · Helianthus annuus (common sunflower)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
nickel atom · growth · Helianthus annuus (common sunflower)Results agree
3 papers in the same direction as this paper
- negative
- negative
- negative
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.