Abstract
Accumulation of noxious elements in the edible part of crops and its impact on food safety is of increasing concern. Rice is one of the major staple food crops worldwide, including arsenic (As)-polluted areas, in which dietary As exposure is becoming a widespread health threat. Plant chemical priming has been shown to be an effective strategy to enhance tolerance to environmental stresses, including metal(loid) exposure. The priming effect of ascorbic acid (AsA) was assessed in rice seedlings exposed to As(V) in a hydroponics experiment. AsA treatment (co-addition to the growing media concomitantly (t0) or 24 h in advance (t24)) prevented an excessive accumulation of As in the roots (that decreased ∼ 60%) and stimulated the activities of photosynthetic and antioxidant attributes (∼1.2-fold) in the aerial part of the plants. The increase in proline levels in both shoots (∼2.1-fold) and roots (∼2.4-fold) was found to be the most sensitive stress parameter, and was able to reflect the AsA-induced reduction of As toxic effects (concentrations back to Control levels, both simultaneously added or added as a pretreatment) in the aerial part of the plants. However, the phytotoxic effects related to As exposure were not fully prevented by priming with AsA, and further research is needed to find alternative priming approaches.
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Claims 6
Claim · model-written summary
AsA priming reduced root As accumulation by about 60%.
- Taxon
- Oryza sativa L.
Oryza sativat0 - Treatment
- AsA treatmente0
- Outcome
- accumulation of As in the rootse0
- Direction
- decreasede0
- Value
- ∼ 60%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Oryza sativa L.”
e0“AsA treatment (co-addition to the growing media concomitantly (t0) or 24 h in advance (t24)) prevented an excessive accumulation of As in the roots (that decreased ∼ 60%)”
Claim · model-written summary
AsA priming stimulated photosynthetic and antioxidant attributes about 1.2-fold in aerial tissue.
- Taxon
- Oryza sativa L.Oryza sativat0
- Treatment
- AsAt0
- Outcome
- activities of photosynthetic and antioxidant attributese0
- Direction
- stimulatede0
- Value
- ∼1.2-folde0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Oryza sativa L.”
e0“stimulated the activities of photosynthetic and antioxidant attributes (∼1.2-fold) in the aerial part of the plants”
Claim · model-written summary
Shoot proline increased about 2.1-fold with AsA priming.
- Taxon
- Oryza sativa L.Oryza sativat0
- Treatment
- ascorbic acidt1
- Outcome
- proline levels in both shootse0
- Direction
- increasee0
- Value
- ∼2.1-folde0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Oryza sativa L.”
t1“ascorbic acid”
e0“The increase in proline levels in both shoots (∼2.1-fold) and roots (∼2.4-fold)”
Claim · model-written summary
Root proline increased about 2.4-fold with AsA priming.
- Taxon
- Oryza sativa L.Oryza sativat0
- Treatment
- ascorbic acidt1
- Outcome
- proline levels in both shootse0
- Direction
- increasee0
- Value
- ∼2.4-folde0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Oryza sativa L.”
t1“ascorbic acid”
e0“The increase in proline levels in both shoots (∼2.1-fold) and roots (∼2.4-fold)”
Claim · model-written summary
AsA priming reduced aerial As toxic effects to control levels.
- Taxon
- Oryza sativa L.Oryza sativat0
- Treatment
- AsAe0
- Outcome
- As toxic effectse0
- Direction
- reductione0
- Comparator
- Controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Oryza sativa L.”
e0“AsA-induced reduction of As toxic effects (concentrations back to Control levels, both simultaneously added or added as a pretreatment) in the aerial part of the plants”
Claim · model-written summary
AsA priming did not fully prevent As phytotoxicity.
- Taxon
- Oryza sativa L.Oryza sativat0
- Treatment
- priming with AsAe0
- Outcome
- phytotoxic effects related to As exposuree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Oryza sativa L.”
e0“the phytotoxic effects related to As exposure were not fully prevented by priming with AsA”
The same questions in other papers
L-ascorbic acid · molecular: metabolites · Oryza sativa (rice)Results agree
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L-ascorbic acid · physiology: photosynthesis · Oryza sativa (rice)Results agree
4 papers in the same direction as this paper
- positive
- positive
- positive
1 paper more in this group
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.