Abstract
The effect of nickel (Ni) on growth and some tolerance strategies with regard to heavy metal tolerance mechanism was investigated in radish (Raphanus sativus) seedlings. The protective effect of histidine on nickel stress conditions was also monitored. The seedling growth decreased with an increase in metal concentrations. The inhibitory effect was more pronounced in the root elongation than in the shoot elongation. Increasing Ni supply showed a progressive increase of Ni concentrations in the roots and shoots. Ni content was higher in the shoots than in the roots. In the presence of nickel, radish exhibited an antioxidative defense mechanism, as evidenced by the elevated malondialdehyde(MDA), showing that nickel is an efficient inducer of lipid peroxidation. Exposure of radish to elevated concentrations of nickel was accompanied by an increase in the proline content. Supplemental histidine in the presence of Ni ameliorated metal-induced growth inhibition and lipid peroxidation. Combinations of Ni and histidine resulted in a significant decline in proline content compared with Ni stress alone, indicating that histidine may provide protection against the adverse effect of Ni stress. From the results it is suggested that histidine is an efficient chelator by complexing metal ion within the plant and may playa role in nickel tolerance implicated in metal detoxification.
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Claims 10
Claim · model-written summary
Seedling growth of radish decreased as metal concentrations increased.
- Taxon
- Raphanus sativus
Raphanus sativust0 - Treatment
- increase in metal concentrationse2
- Outcome
- seedling growthe2
- Direction
- decreasede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Raphanus sativus”
e2“The seedling growth decreased with an increase in metal concentrations”
Claim · model-written summary
Nickel inhibited root elongation more strongly than shoot elongation in radish.
- Taxon
- Raphanus sativusRaphanus sativust0
- Treatment
- nickele1
- Outcome
- root elongatione3
- Direction
- more pronouncede3
- Comparator
- shoot elongatione3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Raphanus sativus”
e1“The effect of nickel (Ni) on growth and some tolerance strategies with regard to heavy metal tolerance mechanism was investigated in radish (Raphanus sativus) seedlings”
e3“The inhibitory effect was more pronounced in the root elongation than in the shoot elongation”
Claim · model-written summary
Ni concentrations in roots and shoots increased progressively as Ni supply increased.
- Taxon
- Raphanus sativusRaphanus sativust0
- Organ / stage
- roots and shootse4
- Treatment
- Increasing Ni supplye4
- Outcome
- Ni concentrationse4
- Direction
- progressive increasee4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Raphanus sativus”
e4“Increasing Ni supply showed a progressive increase of Ni concentrations in the roots and shoots”
Claim · model-written summary
Ni content was higher in radish shoots than in roots.
- Taxon
- Raphanus sativusRaphanus sativust0
- Organ / stage
- shootse5
- Outcome
- Ni contente5
- Direction
- highere5
- Comparator
- rootse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Raphanus sativus”
e5“Ni content was higher in the shoots than in the roots”
Claim · model-written summary
Nickel elevated malondialdehyde (MDA), indicating that nickel induces lipid peroxidation in radish.
- Taxon
- Raphanus sativusRaphanus sativust0
- Treatment
- In the presence of nickele6
- Outcome
- malondialdehyde(MDA)e6
- Direction
- elevatede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Raphanus sativus”
e6“In the presence of nickel, radish exhibited an antioxidative defense mechanism, as evidenced by the elevated malondialdehyde(MDA), showing that nickel is an efficient inducer of lipid peroxidation”
Claim · model-written summary
Radish exhibits an antioxidative defense mechanism under nickel stress.
- Taxon
- Raphanus sativusRaphanus sativust0
- Treatment
- In the presence of nickele6
- Outcome
- antioxidative defense mechanisme6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Raphanus sativus”
e6“In the presence of nickel, radish exhibited an antioxidative defense mechanism, as evidenced by the elevated malondialdehyde(MDA), showing that nickel is an efficient inducer of lipid peroxidation”
Claim · model-written summary
Elevated nickel increased proline content in radish.
- Taxon
- Raphanus sativusRaphanus sativust0
- Treatment
- elevated concentrations of nickele7
- Outcome
- proline contente7
- Direction
- an increasee7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Raphanus sativus”
e7“Exposure of radish to elevated concentrations of nickel was accompanied by an increase in the proline content”
Claim · model-written summary
Supplemental histidine ameliorated nickel-induced growth inhibition and lipid peroxidation.
- Taxon
- Raphanus sativusRaphanus sativust0
- Treatment
- Supplemental histidinee1
- Outcome
- metal-induced growth inhibition and lipid peroxidatione1
- Direction
- amelioratede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Raphanus sativus”
e1“Supplemental histidine in the presence of Ni ameliorated metal-induced growth inhibition and lipid peroxidation”
Claim · model-written summary
Combined nickel and histidine significantly reduced proline content compared with nickel alone.
- Taxon
- Raphanus sativusRaphanus sativust0
- Treatment
- Combinations of Ni and histidinee2
- Outcome
- proline contente2
- Direction
- declinee2
- Comparator
- Ni stress alonee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Raphanus sativus”
e2“Combinations of Ni and histidine resulted in a significant decline in proline content compared with Ni stress alone”
Claim · model-written summary
Histidine may act as a chelator that complexes metal ions within the plant and so play a role in nickel tolerance.
- Taxon
- Raphanus sativusRaphanus sativust0
- Compound
- histidinee3
- Outcome
- nickel tolerancee3
- Qualifier
- complexing metal ion within the plante3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Raphanus sativus”
e3“histidine is an efficient chelator by complexing metal ion within the plant and may playa role in nickel tolerance”
The same questions in other papers
nickel atom · growth · Raphanus sativus (radish)Positive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- 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.