Abstract
Soil arsenic (As) contamination poses a significant threat to food security and human health. Diatomaceous earth (DE) as a representative exogenous mineral silicon can effectively regulate the migration and transformation of As in the soil-rice system. However, the mechanisms underlying the effects of DE application on As uptake, translocation, and stress regulation in rice remain unclear. In this study, pot experiments were conducted to investigate the effects of applying different amounts of DE on As uptake, translocation, and key physiological and biochemical indicators in rice. The results demonstrated that the application of DE significantly inhibited As uptake and translocation in rice, and reduced As content in brown rice by 40.96-85.88 %. The application of DE promoted As adsorption by iron plaque formation on rice root surface, increased the capacity of cell wall for As immobilization, and promoted greater As accumulation in husk by regulating the expression of transporter genes, thereby reducing As content in brown rice. The application of DE regulated antioxidant enzyme activities, and alleviated the toxic effects of As in rice. This study has deepened our understanding of the mechanisms by which DE inhibits As uptake and translocation in rice, and provided more biological knowledge for reducing arsenic accumulation and mitigating As stress in rice.
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Claims 6
Claim · model-written summary
DE significantly inhibited arsenic uptake and translocation in rice.
- Taxon
- rice
Oryza sativae0 - Treatment
- application of DEe0
- Outcome
- As uptake and translocatione0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the application of DE significantly inhibited As uptake and translocation in rice”
Claim · model-written summary
DE reduced arsenic content in brown rice by 40.96-85.88 %.
- Taxon
- riceOryza sativae0
- Treatment
- DEe1
- Outcome
- As content in brown ricee0
- Direction
- reducede0
- Value
- 40.96-85.88 %e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reduced As content in brown rice by 40.96-85.88 %”
t0“exogenous mineral silicon”
e1“Diatomaceous earth (DE) as a representative exogenous mineral silicon”
Claim · model-written summary
DE promoted arsenic adsorption through root iron plaque formation.
- Taxon
- riceOryza sativae0
- Treatment
- application of DEe0
- Outcome
- As adsorptione0
- Direction
- promotede0
- Qualifier
- iron plaque formation on rice root surfacee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of DE promoted As adsorption by iron plaque formation on rice root surface”
Claim · model-written summary
DE increased cell-wall capacity for arsenic immobilization.
- Taxon
- riceOryza sativat0
- Outcome
- capacity of cell wall for As immobilizatione0
- Direction
- increasede0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased the capacity of cell wall for As immobilization”
t0“rice”
Claim · model-written summary
DE promoted arsenic accumulation in husks by regulating transporter-gene expression.
- Taxon
- riceOryza sativat0
- Gene
- transporter genese0
- Outcome
- As accumulation in huske0
- Direction
- greatere0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“promoted greater As accumulation in husk by regulating the expression of transporter genes”
t0“rice”
Claim · model-written summary
DE regulated antioxidant enzymes and alleviated arsenic toxicity in rice.
- Taxon
- riceOryza sativae0
- Treatment
- application of DEe0
- Outcome
- antioxidant enzyme activities, and alleviated the toxic effects of Ase0
- Direction
- alleviatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of DE regulated antioxidant enzyme activities, and alleviated the toxic effects of As in rice”
The same questions in other papers
diatomaceous earth · nutrient: content · Oryza sativa (rice)Positive and negative results
3 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
- positive
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See all 5 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.