Abstract
Application of exogenous putrescine (Put) increases nickel accumulation in rape shoots (Brassica napus), improving potential for phytoremediation of contaminated soils. Plants were grown within a growth chamber in water culture for five weeks, then 250-500 microM NiCl2 was added to rooting media. Within 5 days of treatment, damaging effects of nickel manifested as a reduction of root system size and a decrease of Cu and especially Fe content in young leaves. Spraying leaves of adult plants with Put markedly reduced toxic effects of Ni on root growth, enhanced leaf supply with Fe, and increased Ni content in young leaves by 2.5 times. Plant growth in medium with elevated levels of Ni stimulated accumulation of endogenous spermidine (Spd), spermine (Spm), and especially Put (by 4 times as compared with the control). Results suggest that Ni-induced accumulation of endogenous polyamines in rape leaves is caused by activation of long-distance metal transport within the plant and reduction of its toxicity due to Put chelating action.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 8
Claim · model-written summary
Nickel reduced rape root system size within five days.
- Taxon
- Rape
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napust0 - Treatment
- nickele0
- Outcome
- root system sizee0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
e0“Within 5 days of treatment, damaging effects of nickel manifested as a reduction of root system size”
t0“Rape Shoots”
Claim · model-written summary
Nickel decreased Cu and Fe contents in young rape leaves.
- Taxon
- RapeBrassica napust0
- Organ / stage
- young leavese0
- Treatment
- nickele1
- Outcome
- Cu and especially Fe contente0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a decrease of Cu and especially Fe content in young leaves”
e1“damaging effects of nickel”
t0“Rape Shoots”
Claim · model-written summary
Putrescine spraying reduced nickel toxicity to rape root growth.
- Taxon
- RapeBrassica napust0
- Treatment
- Spraying leaves of adult plants with Pute0
- Outcome
- toxic effects of Ni on root growthe0
- Direction
- markedly reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Spraying leaves of adult plants with Put markedly reduced toxic effects of Ni on root growth”
t0“Rape Shoots”
Claim · model-written summary
Putrescine spraying enhanced iron supply to rape leaves.
- Taxon
- RapeBrassica napust0
- Treatment
- Spraying leaves of adult plants with Pute0
- Outcome
- leaf supply with Fee0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Spraying leaves of adult plants with Put markedly reduced toxic effects of Ni on root growth, enhanced leaf supply with Fe”
t0“Rape Shoots”
Claim · model-written summary
Putrescine spraying increased nickel content of young rape leaves by 2.5 times.
- Taxon
- RapeBrassica napust0
- Treatment
- Spraying leaves of adult plants with Pute0
- Outcome
- Ni content in young leavese0
- Direction
- increasede0
- Value
- 2.5 timese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Spraying leaves of adult plants with Put markedly reduced toxic effects of Ni on root growth, enhanced leaf supply with Fe, and increased Ni content in young leaves by 2.5 times”
t0“Rape Shoots”
Claim · model-written summary
Elevated nickel increased endogenous spermidine, spermine and putrescine accumulation in rape.
- Taxon
- RapeBrassica napust0
- Treatment
- elevated levels of Nie0
- Outcome
- accumulation of endogenous spermidine (Spd), spermine (Spm)e0
- Direction
- stimulatede0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant growth in medium with elevated levels of Ni stimulated accumulation of endogenous spermidine (Spd), spermine (Spm), and especially Put (by 4 times as compared with the control)”
t0“Rape Shoots”
Claim · model-written summary
Elevated nickel increased endogenous putrescine accumulation fourfold in rape.
- Taxon
- RapeBrassica napust0
- Treatment
- elevated levels of Nie0
- Outcome
- Pute0
- Direction
- stimulatede0
- Value
- 4 timese0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant growth in medium with elevated levels of Ni stimulated accumulation of endogenous spermidine (Spd), spermine (Spm), and especially Put (by 4 times as compared with the control)”
t0“Rape Shoots”
Claim · model-written summary
Authors suggest putrescine chelation reduces nickel toxicity during long-distance metal transport.
- Taxon
- rapeBrassica napuse0
- Outcome
- reduction of its toxicitye0
- Qualifier
- Put chelating actione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ni-induced accumulation of endogenous polyamines in rape leaves is caused by activation of long-distance metal transport within the plant and reduction of its toxicity due to Put chelating action”
The same questions in other papers
nickel atom · growth · Brassica napus (oilseed rape)Positive and negative results
3 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
- negative
1 paper more in this group
See all 5 papers →putrescine · growth · Brassica napus (oilseed rape)Results agree
1 paper in the same direction as this paper
- positive
nickel atom · nutrient: content · Brassica napus (oilseed rape)Results agree
1 paper in the same direction as this paper
- no effect
application · nutrient: content · Brassica napus (oilseed rape)Positive and negative results
14 papers in the same direction as this paper · 3 in the opposite direction
- no effect
- no effect
- no effect
14 papers more in this group
See all 18 papers →application · growth · Brassica napus (oilseed rape)Positive and negative results
37 papers in the same direction as this paper · 8 in the opposite direction · 1 reporting no difference from an alternative
- negative
- no effect
- negative
43 papers more in this group
See all 47 papers →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.