Abstract
Mitigating arsenic (As) accumulation in rice while maintaining yield is a critical challenge for food safety. This study demonstrates that in-situ reactive oxygen species (ROS) generation, driven by hydrogen peroxide (H 2 O 2 ) from natural rain and anthropogenic source (urea hydrogen peroxide, UHP), effectively addresses this challenge. A pot experiment revealed that both H 2 O 2 sources, especially UHP, significantly induced in-situ production of ROS levels (H 2 O 2 and hydroxyl radicals (•OH). The ROS burst effectively suppressed the mobility of As by oxidizing 57-83% of the mobile As(III) to the less bioavailable As(V) in soil porewater during the heading stage, thereby significantly reduced As accumulation in both aboveground and belowground tissues by 15.3-34.7%. Critically, total As concentration in rice grains was markedly decreased by 17.7-30.1% under both H 2 O 2 sources, with UHP being more effective than rain, and showed significant negative correlations with both H 2 O 2 and •OH levels. Simultaneously, rice yield was significantly improved, showing the greatest enhancement under UHP amendment, and demonstrating a strong positive correlation with ROS levels. These findings confirm that H 2 O 2 -driven ROS generation, particularly from UHP amendment, provides a promising in-situ strategy for the dual goals of reducing grain As accumulation and enhancing yield in As-contaminated paddy fields. • Rainwater-borne H 2 O 2 triggered hydroxyl radical ( ● OH) production in paddy soils • Application of urea hydrogen peroxide (UHP) also generated in-soil ● OH • UHP application resulted in stronger in-soil ROS generation compared to rain • Elevated ● OH levels concurrently enhanced rice yield and reduced grain-As • Findings have implications for managing As contamination in paddy rice systems
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Claims 11
Claim · model-written summary
Both peroxide sources, particularly UHP, significantly increased in-soil ROS.
- Taxon
- rice
Oryza sativat0 - Treatment
- both H 2 O 2 sourcese0
- Outcome
- ROS levelse0
- Direction
- inducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both H 2 O 2 sources, especially UHP, significantly induced in-situ production of ROS levels (H 2 O 2 and hydroxyl radicals (•OH)”
t0“rice”
Claim · model-written summary
ROS oxidized 57-83% of mobile As(III) to As(V) in porewater at heading.
- Taxon
- riceOryza sativat0
- Organ / stage
- heading stagee0
- Outcome
- mobile As(III)e0
- Direction
- oxidizinge0
- Value
- 57-83%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“oxidizing 57-83% of the mobile As(III) to the less bioavailable As(V) in soil porewater during the heading stage”
t0“rice”
Claim · model-written summary
ROS reduced arsenic accumulation in aboveground and belowground rice tissues by 15.3-34.7%.
- Taxon
- riceOryza sativat0
- Organ / stage
- aboveground and belowground tissuese0
- Treatment
- ROS burste1
- Outcome
- As accumulatione0
- Direction
- reducede0
- Value
- 15.3-34.7%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significantly reduced As accumulation in both aboveground and belowground tissues by 15.3-34.7%”
e1“ROS burst”
t0“rice”
Claim · model-written summary
Both peroxide sources decreased total rice grain As by 17.7-30.1%, with UHP more effective than rain.
- Taxon
- riceOryza sativae0
- Treatment
- both H 2 O 2 sourcese0
- Outcome
- total As concentration in rice grainse0
- Direction
- decreasede0
- Value
- 17.7-30.1%e0
- Comparator
- raine0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“total As concentration in rice grains was markedly decreased by 17.7-30.1% under both H 2 O 2 sources, with UHP being more effective than rain”
Claim · model-written summary
Rice grain As was significantly negatively correlated with H2O2 and hydroxyl radical levels.
- Taxon
- riceOryza sativae0
- Compound
- H 2 O 2 and •OHe1
- Outcome
- total As concentration in rice grainse0
- Direction
- negativee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“total As concentration in rice grains”
e1“showed significant negative correlations with both H 2 O 2 and •OH levels”
Claim · model-written summary
Rice yield improved significantly under peroxide, most under UHP.
- Taxon
- riceOryza sativae0
- Treatment
- UHP amendmente0
- Outcome
- rice yielde0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“rice yield was significantly improved, showing the greatest enhancement under UHP amendment”
Claim · model-written summary
Rice yield was strongly positively correlated with ROS levels.
- Taxon
- riceOryza sativae0
- Compound
- ROSe1
- Outcome
- rice yielde0
- Direction
- positivee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Simultaneously, rice yield”
e1“demonstrating a strong positive correlation with ROS levels”
Claim · model-written summary
Rainwater peroxide triggered hydroxyl radical production in paddy soils.
- Taxon
- riceOryza sativat0
- Treatment
- Rainwater-borne H 2 O 2e0
- Outcome
- hydroxyl radical ( ● OH) productione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rainwater-borne H 2 O 2 triggered hydroxyl radical ( ● OH) production in paddy soils”
t0“rice”
Claim · model-written summary
UHP application produced hydroxyl radicals in soil.
- Taxon
- riceOryza sativat0
- Treatment
- urea hydrogen peroxide (UHP)e0
- Outcome
- in-soil ● OHe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of urea hydrogen peroxide (UHP) also generated in-soil ● OH”
t0“rice”
Claim · model-written summary
UHP generated more soil ROS than rain.
- Taxon
- riceOryza sativat0
- Treatment
- UHP applicatione0
- Outcome
- in-soil ROS generatione0
- Direction
- strongere0
- Comparator
- raine0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“UHP application resulted in stronger in-soil ROS generation compared to rain”
t0“rice”
Claim · model-written summary
The authors propose peroxide-driven ROS as a strategy to reduce grain As and increase yield.
- Taxon
- riceOryza sativat0
- Treatment
- UHP amendmente0
- Outcome
- reducing grain As accumulation and enhancing yielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“H 2 O 2 -driven ROS generation, particularly from UHP amendment, provides a promising in-situ strategy for the dual goals of reducing grain As accumulation and enhancing yield in As-contaminated paddy fields”
t0“rice”
The same questions in other papers
reactive oxygen species · nutrient: content · Oryza sativa (rice)Positive and negative results
1 in the opposite direction
- negative
hydrogen peroxide · nutrient: content · Oryza sativa (rice)Positive and negative results
2 papers in the same direction as this paper · 3 in the opposite direction
- negative
- negative
- negative
2 papers more in this group
See all 6 papers →urea hydrogen peroxide · yield · Oryza sativa (rice)Results agree
2 papers in the same direction as this paper
- positive
- positive
other · yield · Oryza sativa (rice)Positive and negative results
160 papers in the same direction as this paper · 5 in the opposite direction
- no effect
- no effect
- no effect
162 papers more in this group
See all 166 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.