Abstract
Eco-toxicity of nanomaterials was subject to more and more attention recently. The toxicity of copper oxide nanoparticles(22~75 nm, the average 43 nm) to seed germination of Chinese cabbage was investigated, and the counterpart investigation of copper oxide micron particle and copper ions were compared. The results showed that the effect of copper oxide nanoparticles within the concentrations of 0.2, 0.5, 1, 2, 4 mg·L-1 and 8 mg·L-1 on seed germination rate of Chinese cabbage showed no significant difference compared with control(P0.05), but the inhibitation of root elongation and shoot elongation was observed in lower concentrations. With the increasing concentrations of copper oxide nanoparticles, inhibition rate increased significantly for root elongation but slowly for shoot elongation, with half-inhibitory concentration (IC50) of 11.4 mg·L-1 and 1 309.4 mg·L-1, respectively. The toxicity of copper oxide nanoparticles was stronger than that of copper oxide micron particle. However the copper ion(Cu2+, 0.22 mg·L-1) dissolved from 8 mg·L-1 of copper oxide nanoparticles contributed to the inhibitation only 4.6% for root elongation and almost zero for shoot elongation.
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Claims 8
Claim · model-written summary
Copper oxide nanoparticles from 0.2 to 8 mg·L-1 did not significantly change cabbage seed germination rate versus control.
- Taxon
- Chinese cabbage
Brassica rapa subsp. pekinensise0 - Treatment
- copper oxide nanoparticles within the concentrations of 0.2, 0.5, 1, 2, 4 mg·L-1 and 8 mg·L-1e0
- Outcome
- seed germination ratee0
- Direction
- no significant differencee0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effect of copper oxide nanoparticles within the concentrations of 0.2, 0.5, 1, 2, 4 mg·L-1 and 8 mg·L-1 on seed germination rate of Chinese cabbage showed no significant difference compared with control(P0.05)”
e1“the effect of copper oxide nanoparticles within the concentrations of 0.2, 0.5, 1, 2, 4 mg·L-1 and 8 mg·L-1 on seed germination rate of Chinese cabbage showed no significant difference compared with control(P0.05)”
Claim · model-written summary
Low nanoparticle concentrations inhibited root elongation.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Treatment
- lower concentrationse0
- Outcome
- root elongatione0
- Direction
- inhibitatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the inhibitation of root elongation and shoot elongation was observed in lower concentrations.”
e1“the inhibitation of root elongation and shoot elongation was observed in lower concentrations.”
t0“Chinese Cabbage”
Claim · model-written summary
Low nanoparticle concentrations inhibited shoot elongation.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Treatment
- lower concentrationse0
- Outcome
- shoot elongatione0
- Direction
- inhibitatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the inhibitation of root elongation and shoot elongation was observed in lower concentrations.”
e1“the inhibitation of root elongation and shoot elongation was observed in lower concentrations.”
t0“Chinese Cabbage”
Claim · model-written summary
Increasing nanoparticle concentration significantly increased root elongation inhibition; root IC50 was 11.4 mg·L-1.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Organ / stage
- roote0
- Treatment
- increasing concentrations of copper oxide nanoparticlese0
- Outcome
- inhibition ratee0
- Direction
- increasede0
- Value
- 11.4 mg·L-1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With the increasing concentrations of copper oxide nanoparticles, inhibition rate increased significantly for root elongation but slowly for shoot elongation, with half-inhibitory concentration (IC50) of 11.4 mg·L-1 and 1 309.4 mg·L-1, respectively.”
e1“With the increasing concentrations of copper oxide nanoparticles, inhibition rate increased significantly for root elongation but slowly for shoot elongation, with half-inhibitory concentration (IC50) of 11.4 mg·L-1 and 1 309.4 mg·L-1, respectively.”
t0“Chinese Cabbage”
Claim · model-written summary
Increasing nanoparticle concentration slowly increased shoot elongation inhibition; shoot IC50 was 1 309.4 mg·L-1.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Organ / stage
- shoote0
- Treatment
- increasing concentrations of copper oxide nanoparticlese0
- Outcome
- inhibition ratee0
- Direction
- increasede0
- Value
- 1 309.4 mg·L-1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With the increasing concentrations of copper oxide nanoparticles, inhibition rate increased significantly for root elongation but slowly for shoot elongation, with half-inhibitory concentration (IC50) of 11.4 mg·L-1 and 1 309.4 mg·L-1, respectively.”
e1“With the increasing concentrations of copper oxide nanoparticles, inhibition rate increased significantly for root elongation but slowly for shoot elongation, with half-inhibitory concentration (IC50) of 11.4 mg·L-1 and 1 309.4 mg·L-1, respectively.”
t0“Chinese Cabbage”
Claim · model-written summary
Copper oxide nanoparticles were more toxic than copper oxide micron particles.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Treatment
- copper oxide nanoparticlese0
- Outcome
- toxicitye0
- Direction
- strongere0
- Comparator
- copper oxide micron particlee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The toxicity of copper oxide nanoparticles was stronger than that of copper oxide micron particle.”
e1“The toxicity of copper oxide nanoparticles was stronger than that of copper oxide micron particle.”
t0“Chinese Cabbage”
Claim · model-written summary
Dissolved copper ions contributed only 4.6% of root elongation inhibition.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Treatment
- copper ion(Cu2+, 0.22 mg·L-1)e0
- Outcome
- inhibitation only 4.6% for root elongatione0
- Value
- 4.6%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the copper ion(Cu2+, 0.22 mg·L-1) dissolved from 8 mg·L-1 of copper oxide nanoparticles contributed to the inhibitation only 4.6% for root elongation”
e1“the copper ion(Cu2+, 0.22 mg·L-1) dissolved from 8 mg·L-1 of copper oxide nanoparticles contributed to the inhibitation only 4.6% for root elongation”
t0“Chinese Cabbage”
Claim · model-written summary
Dissolved copper ions contributed almost zero shoot elongation inhibition.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Treatment
- copper ione2
- Outcome
- almost zero for shoot elongatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“almost zero for shoot elongation.”
e1“almost zero for shoot elongation.”
e2“the copper ion(Cu2+, 0.22 mg·L-1) dissolved from 8 mg·L-1 of copper oxide nanoparticles contributed to the inhibitation only 4.6% for root elongation”
t0“Chinese Cabbage”
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See all 15 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.