Abstract
Soil contamination with cadmium (Cd) poses risk to human health. Metal hyperaccumulator plants play an important role in phytoextraction of heavy metals from such contaminated sites. Accumulation of Cd and its influence on the induction of phytochelatins in Brassica napus was investigated. Brassica napus plants were grown in nutrient culture with 1 and 5 microM Cd for 10 days. The biomass negatively correlates with Cd concentration in the nutrient solution and the reduction in dry weight was significantly higher for the root than the shoot. Cadmium accumulation positively correlates with the Cd concentration in the nutrient solution and the Cd accumulation in root is significantly higher than the shoot. High-performance liquid chromatography (HPLC) analysis revealed the induction of PC2, PC3 and PC4 in response to Cd in B. napus and their concentrations vary with the Cd level in the external solution. In 1 microM Cd treated plants; PC2 was the dominant thiol fraction in the root, followed by PC3 and PC4, whereas in the shoot, PC3 is the dominant species followed by PC4 and PC2. In 5 microM Cd treated plants, the concentration of both PC3 and PC4 are higher than that of PC2 in the roots. In the shoot, the concentration of PC3 and PC4 was higher than the PC2 irrespective of the quantity of Cd uptake, implying that the detoxification of Cd involves higher molecular weight thiol complexes in the shoot. Considering the high aboveground biomass and Cd accumulation in the shoot, B. napus can be a potential candidate for the phytoextraction of Cd.
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Claims 10
Claim · model-written summary
Biomass declined as nutrient-solution cadmium concentration rose.
- Taxon
- BRASSICA NAPUS
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napust0 - Treatment
- Cd concentration in the nutrient solutione0
- Outcome
- biomasse0
- Direction
- negatively correlatese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
e0“The biomass negatively correlates with Cd concentration in the nutrient solution”
t0“BRASSICA NAPUS”
Claim · model-written summary
Cadmium reduced root dry weight significantly more than shoot dry weight.
- Taxon
- Brassica napusBrassica napuse1
- Organ / stage
- roote0
- Treatment
- 1 and 5 microM Cde1
- Outcome
- dry weighte0
- Direction
- reductione0
- Comparator
- shoote0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the reduction in dry weight was significantly higher for the root than the shoot”
e1“Brassica napus plants were grown in nutrient culture with 1 and 5 microM Cd for 10 days”
Claim · model-written summary
Cadmium accumulation increased with cadmium concentration in nutrient solution.
- Taxon
- Brassica napusBrassica napuse1
- Treatment
- Cd concentration in the nutrient solutione0
- Outcome
- Cadmium accumulatione0
- Direction
- positively correlatese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cadmium accumulation positively correlates with the Cd concentration in the nutrient solution”
e1“in Brassica napus”
Claim · model-written summary
Roots accumulated significantly more cadmium than shoots.
- Taxon
- Brassica napusBrassica napuse1
- Organ / stage
- roote0
- Outcome
- Cd accumulatione0
- Direction
- highere0
- Comparator
- shoote0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the Cd accumulation in root is significantly higher than the shoot”
e1“in Brassica napus”
Claim · model-written summary
Cadmium induced PC2, PC3 and PC4 in Brassica napus, with concentrations varying by external cadmium level.
- Taxon
- B. napusBrassica napuse0
- Treatment
- Cde0
- Outcome
- PC2, PC3 and PC4e0
- Direction
- inductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the induction of PC2, PC3 and PC4 in response to Cd in B. napus and their concentrations vary with the Cd level in the external solution”
Claim · model-written summary
At 1 microM cadmium, PC2 dominated root thiols, followed by PC3 and PC4.
- Taxon
- Brassica napusBrassica napuse1
- Organ / stage
- roote0
- Treatment
- 1 microM Cde0
- Outcome
- PC2 was the dominant thiol fractione0
- Qualifier
- followed by PC3 and PC4e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 1 microM Cd treated plants; PC2 was the dominant thiol fraction in the root, followed by PC3 and PC4”
e1“Brassica napus plants”
Claim · model-written summary
At 1 microM cadmium, PC3 dominated shoot thiols, followed by PC4 and PC2.
- Taxon
- Brassica napusBrassica napuse2
- Organ / stage
- shoote0
- Treatment
- 1 microM Cde1
- Outcome
- PC3 is the dominant speciese0
- Qualifier
- followed by PC4 and PC2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in the shoot, PC3 is the dominant species followed by PC4 and PC2”
e1“In 1 microM Cd treated plants”
e2“Brassica napus plants”
Claim · model-written summary
At 5 microM cadmium, root PC3 and PC4 concentrations exceeded PC2.
- Taxon
- Brassica napusBrassica napuse1
- Organ / stage
- rootse0
- Treatment
- 5 microM Cde0
- Outcome
- concentration of both PC3 and PC4e0
- Direction
- highere0
- Comparator
- PC2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 5 microM Cd treated plants, the concentration of both PC3 and PC4 are higher than that of PC2 in the roots”
e1“Brassica napus plants”
Claim · model-written summary
Shoot PC3 and PC4 concentrations exceeded PC2 regardless of cadmium uptake.
- Taxon
- Brassica napusBrassica napuse1
- Organ / stage
- shoote0
- Outcome
- concentration of PC3 and PC4e0
- Direction
- highere0
- Qualifier
- irrespective of the quantity of Cd uptakee0
- Comparator
- PC2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the shoot, the concentration of PC3 and PC4 was higher than the PC2 irrespective of the quantity of Cd uptake”
e1“Brassica napus plants”
Claim · model-written summary
The authors propose Brassica napus as a candidate for cadmium phytoextraction.
- Taxon
- B. napusBrassica napuse0
- Outcome
- phytoextraction of Cde0
- Qualifier
- potential candidatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“B. napus can be a potential candidate for the phytoextraction of Cd”
The same questions in other papers
cadmium atom · growth · Brassica napus (oilseed rape)Results differ
18 papers in the same direction as this paper · 3 in the opposite direction
- positive
- positive
- positive
18 papers more in this group
See all 22 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.