Abstract
Nickel (Ni2+) performs a number of vital functions in plants, but at high concentrations it causes toxic effects and inhibits their growth and development. The problem of nickel contamination has a special place in environmental physiology, since the refuse to use nickel alloys and therefore the reduction of Ni2+ release into the biosphere are practically impossible today. In nature one of the mechanisms of adaptation to the excessive nickel content in the medium is increased synthesis of histidine, which forms chelates with Ni2+. In the present work, for the first time, a detailed analysis of the effects of nickel and nickel-histidine complexes on the growth and development of sunflower roots (Helianthus annuus L.) of Belarusian selection (variety Orion) was carried out. It was established that Ni2+, starting from its level in the medium of 0.3 mmol/L, caused a significant growth inhibition of this agricultural plant. At a nickel concentration in the medium above 3 mmol/L, the growth of sunflower stopped completely. Histidine, introduced together with Ni2+, caused a decrease in the toxicity of this metal for the root system, in some cases shifting by single-order nickel concentrations, causing the same effect. Nickel treatment caused a significant increase in the percentage of cells with programmed cell death symptoms, while histidine inhibited the development of these symptoms. Thus, the concentration dependences of nickel and nickel-histidine complexes effects on root growth and the processes of programmed cell death in the sunflower root were first demonstrated.
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Claims 5
Claim · model-written summary
Nickel ions at 0.3 mmol/L and above caused a significant growth inhibition of sunflower roots.
- Taxon
- Helianthus annuus L.
Helianthus annuust0 - Material
- Orione5
- Organ / stage
- rootse5
- Treatment
- Ni2+e0
- Outcome
- growthe0
- Direction
- decreaseinferrede0
- Qualifier
- starting from its level in the medium of 0.3 mmol/Le0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in the root of Helianthus annuus L.”
e5“sunflower roots (Helianthus annuus L.) of Belarusian selection (variety Orion)”
e0“Ni2+, starting from its level in the medium of 0.3 mmol/L, caused a significant growth inhibition of this agricultural plant”
Claim · model-written summary
Nickel above 3 mmol/L completely stopped sunflower growth.
- Taxon
- Helianthus annuus L.Helianthus annuust0
- Treatment
- nickele1
- Outcome
- growth of sunflowere1
- Direction
- decreaseinferrede1
- Qualifier
- At a nickel concentration in the medium above 3 mmol/Le1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in the root of Helianthus annuus L.”
e1“At a nickel concentration in the medium above 3 mmol/L, the growth of sunflower stopped completely”
Claim · model-written summary
Histidine applied with Ni2+ decreased the toxicity of nickel for the sunflower root system.
- Taxon
- Helianthus annuus L.Helianthus annuust0
- Organ / stage
- root systeme2
- Treatment
- Histidinee2
- Outcome
- toxicity of this metal for the root systeme2
- Direction
- decreasee2
- Qualifier
- in some cases shifting by single-order nickel concentrationse2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in the root of Helianthus annuus L.”
e2“Histidine, introduced together with Ni2+, caused a decrease in the toxicity of this metal for the root system, in some cases shifting by single-order nickel concentrations, causing the same effect”
Claim · model-written summary
Nickel treatment significantly increased the percentage of sunflower root cells with programmed cell death symptoms.
- Taxon
- Helianthus annuus L.Helianthus annuust0
- Treatment
- Nickel treatmente3
- Outcome
- percentage of cells with programmed cell death symptomse3
- Direction
- increasee3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in the root of Helianthus annuus L.”
e3“Nickel treatment caused a significant increase in the percentage of cells with programmed cell death symptoms, while histidine inhibited the development of these symptoms”
Claim · model-written summary
Histidine inhibited the development of programmed cell death symptoms in sunflower roots exposed to nickel.
- Taxon
- Helianthus annuus L.Helianthus annuust0
- Treatment
- histidinee4
- Outcome
- development of these symptomse4
- Direction
- decreaseinferrede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in the root of Helianthus annuus L.”
e4“histidine inhibited the development of these symptoms”
e3“Nickel treatment caused a significant increase in the percentage of cells with programmed cell death symptoms, while histidine inhibited the development of these symptoms”
The same questions in other papers
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.