Abstract
Silicon (Si) is beneficial for plant growth and aids in stress tolerance. In this study, the effects of Si on long-term copper (Cu) toxicity in the low Si accumulator Nicotiana tabacum were evaluated. Silicon supplementation alleviated growth inhibition in roots and shoots of N. tabacum exposed to Cu toxicity. Alleviation of Cu toxicity correlated with increased Si accumulation in roots and leaves, suggesting N. tabacum contains a stress-regulated mechanism for Si transport. Root Cu concentration decreased in Si-supplemented plants exposed to Cu toxicity. Interestingly, Copper Transporter 1 (COPT1) expression decreased in roots of Si-supplemented plants exposed to Cu toxicity, which may contribute to Cu uptake reduction. Decreases in ethylene (ET) biosynthetic gene expression were previously implicated in Si-mediated stress alleviation. In the present study, Si-mediated alleviation of Cu toxicity corresponded with increased ET biosynthetic gene expression.
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Claims 7
Claim · model-written summary
Silicon supplementation alleviated copper-related growth inhibition in tobacco roots and shoots.
- Taxon
- Nicotiana tabacum
Nicotiana tabacumt0 - Organ / stage
- roots and shootse0
- Treatment
- Silicon supplementatione0
- Outcome
- growth inhibition in roots and shootse0
- Direction
- alleviatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Silicon supplementation alleviated growth inhibition in roots and shoots of N. tabacum exposed to Cu toxicity”
t0“Nicotiana tabacum”
Claim · model-written summary
Alleviation of copper toxicity correlated with greater silicon accumulation in tobacco roots and leaves.
- Taxon
- Nicotiana tabacumNicotiana tabacumt0
- Organ / stage
- roots and leavese0
- Outcome
- Si accumulation in roots and leavese0
- Direction
- increasede0
- Qualifier
- Alleviation of Cu toxicitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Alleviation of Cu toxicity correlated with increased Si accumulation in roots and leaves”
t0“Nicotiana tabacum”
Claim · model-written summary
The authors suggest tobacco has a stress-regulated mechanism for silicon transport.
- Taxon
- Nicotiana tabacumNicotiana tabacumt0
- Outcome
- Si transporte0
- Qualifier
- stress-regulated mechanisme0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“suggesting N. tabacum contains a stress-regulated mechanism for Si transport”
t0“Nicotiana tabacum”
Claim · model-written summary
Root copper concentration declined in silicon-supplemented tobacco exposed to copper toxicity.
- Taxon
- Nicotiana tabacumNicotiana tabacumt0
- Organ / stage
- Roote0
- Treatment
- Si-supplementede0
- Outcome
- Root Cu concentratione0
- Direction
- decreasede0
- Qualifier
- exposed to Cu toxicitye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root Cu concentration decreased in Si-supplemented plants exposed to Cu toxicity”
t0“Nicotiana tabacum”
Claim · model-written summary
COPT1 expression declined in roots of silicon-supplemented tobacco exposed to copper toxicity.
- Taxon
- Nicotiana tabacumNicotiana tabacumt0
- Organ / stage
- rootse0
- Treatment
- Si-supplementede0
- Gene
- Copper Transporter 1 (COPT1)e0
- Outcome
- Copper Transporter 1 (COPT1) expressione0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Copper Transporter 1 (COPT1) expression decreased in roots of Si-supplemented plants exposed to Cu toxicity”
t0“Nicotiana tabacum”
Claim · model-written summary
The authors suggest reduced COPT1 expression may contribute to reduced copper uptake.
- Taxon
- Nicotiana tabacumNicotiana tabacumt0
- Gene
- Copper Transporter 1 (COPT1)e0
- Outcome
- Cu uptake reductione0
- Qualifier
- may contributee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Copper Transporter 1 (COPT1) expression decreased in roots of Si-supplemented plants exposed to Cu toxicity, which may contribute to Cu uptake reduction”
t0“Nicotiana tabacum”
Claim · model-written summary
Silicon-mediated alleviation of copper toxicity corresponded with increased ethylene biosynthetic gene expression.
- Taxon
- Nicotiana tabacumNicotiana tabacumt0
- Gene
- ET biosynthetic genee0
- Outcome
- ET biosynthetic gene expressione0
- Direction
- increasede0
- Qualifier
- Si-mediated alleviation of Cu toxicitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Si-mediated alleviation of Cu toxicity corresponded with increased ET biosynthetic gene expression”
t0“Nicotiana tabacum”
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See all 8 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.