Abstract
In this study, an experiment was carried out to study the process of stress adaptation in Lemna gibba grown under nickel stress (0-20 mg Ni L(-1)). The results showed that Ni concentrations in plants increased with increasing Ni supply levels and reached a maximum of 142.82 mg.kg1 DW at 0.5 mg x L(-1) Ni treatments. The level of photosynthetic pigments (Chl a, Chi b, and total Chl) and soluble proteins increased upon exposure to high Ni concentrations. At the same time, the level of malondialdehyde (MDA) increased with increasing Ni concentration. These results suggested an alleviation of stress that was presumably the results of antioxidants such as superoxide dismutase (SOD), catalase (CAT) which generally increased linearly with increasing Ni levels. In addition, the proline content in L. gibba increased with increasing nickel levels. Our present work concluded that Lemna gibba has a high level of nickel tolerance and accumulation. We also found that moderate nickel treatment (0.05-5 mg x L(-1)) alleviated oxidative stress in plants, while the addition of higher amounts of nickel (10-20 mg x L(-1)) could cause an increasing generation of ROS, which was effectively scavenged by the antioxidative system. Therefore, L. gibba may be used as a phytoremediator in moderately polluted aquatic ecosystems.
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Claims 9
Claim · model-written summary
Plant Ni concentration increased with supply and reached 142.82 mg.kg1 DW at 0.5 mg x L(-1).
- Taxon
- Lemna gibba
Lemna gibbat0 - Treatment
- 0.5 mg x L(-1) Ni treatmentse0
- Outcome
- Ni concentrations in plantse0
- Direction
- increasede0
- Value
- 142.82 mg.kg1 DWe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ni concentrations in plants increased with increasing Ni supply levels and reached a maximum of 142.82 mg.kg1 DW at 0.5 mg x L(-1) Ni treatments”
t0“Lemna Gibba”
Claim · model-written summary
Photosynthetic pigments and soluble proteins increased under high Ni concentrations.
- Taxon
- Lemna gibbaLemna gibbat0
- Treatment
- high Ni concentrationse0
- Outcome
- photosynthetic pigments (Chl a, Chi b, and total Chl) and soluble proteinse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The level of photosynthetic pigments (Chl a, Chi b, and total Chl) and soluble proteins increased upon exposure to high Ni concentrations”
t0“Lemna Gibba”
Claim · model-written summary
MDA increased with Ni concentration.
- Taxon
- Lemna gibbaLemna gibbat0
- Treatment
- Ni concentratione0
- Outcome
- malondialdehyde (MDA)e0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the level of malondialdehyde (MDA) increased with increasing Ni concentration”
t0“Lemna Gibba”
Claim · model-written summary
SOD and CAT generally increased linearly with Ni levels.
- Taxon
- Lemna gibbaLemna gibbat0
- Treatment
- Ni levelse0
- Outcome
- superoxide dismutase (SOD), catalase (CAT)e0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“superoxide dismutase (SOD), catalase (CAT) which generally increased linearly with increasing Ni levels”
t0“Lemna Gibba”
Claim · model-written summary
Proline content increased with Ni levels.
- Taxon
- L. gibbaLemna gibbae0
- Treatment
- nickel levelse0
- Outcome
- proline contente0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the proline content in L. gibba increased with increasing nickel levels”
Claim · model-written summary
Moderate nickel treatment alleviated oxidative stress.
- Taxon
- Lemna gibbaLemna gibbat0
- Treatment
- moderate nickel treatment (0.05-5 mg x L(-1))e0
- Outcome
- oxidative stresse0
- Direction
- alleviatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“moderate nickel treatment (0.05-5 mg x L(-1)) alleviated oxidative stress in plants”
t0“Lemna Gibba”
Claim · model-written summary
Higher nickel amounts increased ROS generation.
- Taxon
- Lemna gibbaLemna gibbat0
- Treatment
- higher amounts of nickel (10-20 mg x L(-1))e0
- Outcome
- generation of ROSe0
- Direction
- increasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher amounts of nickel (10-20 mg x L(-1)) could cause an increasing generation of ROS”
t0“Lemna Gibba”
Claim · model-written summary
The antioxidative system effectively scavenged ROS.
- Taxon
- Lemna gibbaLemna gibbat0
- Outcome
- ROSe0
- Qualifier
- antioxidative systeme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ROS, which was effectively scavenged by the antioxidative system”
t0“Lemna Gibba”
Claim · model-written summary
L. gibba may be used to remediate moderately polluted aquatic ecosystems.
- Taxon
- L. gibbaLemna gibbae0
- Outcome
- used as a phytoremediatore0
- Setting
- moderately polluted aquatic ecosystemse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“L. gibba may be used as a phytoremediator in moderately polluted aquatic ecosystems”