Abstract
Abstract Iron (Fe) toxicity is a constraint commonly encountered in waterlogged conditions. Under anaerobic conditions, reduced Fe is massively absorbed by plants and may induce the generation of reactive oxygen species. This oxidative stress is responsible for physiological perturbations, growth reduction and yield losses. Rice is known as a silicon (Si) accumulator. Although Si is not considered as essential, it is known to play a beneficial role in the resistance to biotic and abiotic stresses through diverse and sometimes unknown mechanisms. The aim of this study was to determine the alleviation of Fe toxicity through Si application in different genotypes. Therefore, cultivars of both cultivated rice species ( Oryza sativa and Oryza glaberrima ) and lines from a segregating population issued from a cross between IR 64 ( O. sativa subsp. indica ) and Azucena ( O. sativa subsp. japonica ) were grown in hydroponics under standard or excessive Fe( II ) conditions, with or without the addition of Si. The application of Si on Fe‐treated plants strongly alleviated Fe toxicity symptoms. The reduced Fe uptake by Si‐treated plants suggested that an avoidance mechanism would be involved in this alleviation. Moreover, an additive effect of the Si and Fe treatments on the absorption of other nutrients by plants was revealed. These promising results gave insights into the understanding of rice resistance mechanisms to Fe toxicity, opening new perspectives in its management through Si fertilization. Finally, plant response to Si application was greatly influenced by the genotype. Thus, selection of stronger Si‐accumulating varieties could also be of valuable interest in the improvement of rice resistance to Fe toxicity.
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Claims 6
Claim · model-written summary
Applying Si strongly alleviated Fe toxicity symptoms in Fe-treated rice plants.
- Taxon
- rice
Oryza sativae1 - Material
- cultivarse1
- Treatment
- application of Sie0
- Outcome
- Fe toxicity symptomse0
- Direction
- alleviatede0
- Qualifier
- Fe‐treated plantse0
- Comparator
- without the addition of Sie1
- Setting
- hydroponicse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of Si on Fe‐treated plants strongly alleviated Fe toxicity symptoms”
e1“cultivars of both cultivated rice species ( Oryza sativa and Oryza glaberrima ) and lines from a segregating population issued from a cross between IR 64 ( O. sativa subsp. indica ) and Azucena ( O. sativa subsp. japonica ) were grown in hydroponics under standard or excessive Fe( II ) conditions, with or without the addition of Si”
Claim · model-written summary
Si-treated rice plants took up less Fe than plants without added Si.
- Taxon
- riceOryza sativae1
- Treatment
- Sie0
- Outcome
- Fe uptakee0
- Direction
- reducede0
- Comparator
- without the addition of Sie1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The reduced Fe uptake by Si‐treated plants suggested that an avoidance mechanism would be involved in this alleviation”
e1“cultivars of both cultivated rice species ( Oryza sativa and Oryza glaberrima ) and lines from a segregating population issued from a cross between IR 64 ( O. sativa subsp. indica ) and Azucena ( O. sativa subsp. japonica ) were grown in hydroponics under standard or excessive Fe( II ) conditions, with or without the addition of Si”
Claim · model-written summary
An avoidance mechanism is suggested to be involved in the alleviation of Fe toxicity by Si in rice.
- Taxon
- riceOryza sativae1
- Outcome
- alleviatione0
- Qualifier
- avoidance mechanisme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The reduced Fe uptake by Si‐treated plants suggested that an avoidance mechanism would be involved in this alleviation”
e1“cultivars of both cultivated rice species ( Oryza sativa and Oryza glaberrima ) and lines from a segregating population issued from a cross between IR 64 ( O. sativa subsp. indica ) and Azucena ( O. sativa subsp. japonica ) were grown in hydroponics under standard or excessive Fe( II ) conditions, with or without the addition of Si”
Claim · model-written summary
Si and Fe treatments had an additive effect on the absorption of other nutrients by rice plants.
- Taxon
- riceOryza sativae1
- Outcome
- absorption of other nutrientse0
- Qualifier
- an additive effect of the Si and Fe treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“an additive effect of the Si and Fe treatments on the absorption of other nutrients by plants was revealed”
e1“cultivars of both cultivated rice species ( Oryza sativa and Oryza glaberrima ) and lines from a segregating population issued from a cross between IR 64 ( O. sativa subsp. indica ) and Azucena ( O. sativa subsp. japonica ) were grown in hydroponics under standard or excessive Fe( II ) conditions, with or without the addition of Si”
Claim · model-written summary
The response of rice plants to Si application was strongly influenced by genotype.
- Taxon
- riceOryza sativae1
- Material
- genotypee0
- Treatment
- Si applicatione0
- Outcome
- plant response to Si applicatione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plant response to Si application was greatly influenced by the genotype”
e1“cultivars of both cultivated rice species ( Oryza sativa and Oryza glaberrima ) and lines from a segregating population issued from a cross between IR 64 ( O. sativa subsp. indica ) and Azucena ( O. sativa subsp. japonica ) were grown in hydroponics under standard or excessive Fe( II ) conditions, with or without the addition of Si”
Claim · model-written summary
Selecting stronger Si-accumulating rice varieties is suggested to be of value for improving rice resistance to Fe toxicity.
- Taxon
- riceOryza sativae0
- Material
- Si‐accumulating varietiese0
- Outcome
- improvement of rice resistance to Fe toxicitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“selection of stronger Si‐accumulating varieties could also be of valuable interest in the improvement of rice resistance to Fe toxicity”
The same questions in other papers
silicon atom · nutrient: content · Oryza sativa (rice)Results differ
163 papers in the same direction as this paper · 13 in the opposite direction
- positive
- no effect
- no effect
173 papers more in this group
See all 177 papers →silicon atom · crop injury · Oryza sativa (rice)Results agree
1 paper in the same direction as this paper
- positive
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.