Abstract
Silicon (Si) and arsenite (iAsIII) share the same pathway of uptake and translocation in rice (Oryza sativa L.), and it has been reported that Si can decrease arsenic (As) uptake by rice in hydroponic culture. Due to the competitive sorption between Si and As for the soil minerals, different extents of effects on As toxicity and uptake by rice as influenced by soil Si application were found. In order to avoid the competitive sorption between Si and As for the soil minerals, foliar applications of Si might be a more efficient alternative to reduce As uptake by rice. Therefore, the aim of this study was to investigate the effects of Si foliar and soil applications on the growth and As accumulation in rice seedlings. In this study, three application rates of Si (as sodium silicate) were applied to (1) the foliage and (2) the soil, of rice grown in two soils with different Si retention capacities and As contents. The results showed that there were no significant differences in Si concentrations in shoots among different Si foliar applications, and it had no significant effect on the growth and As accumulation in rice seedlings. In contrast, soil applications of Si caused a decrease in As accumulation in shoots grown in the tested soils, resulting from a high Si/As ratio in the soil pore water allowing enough Si to out-compete the As for uptake by roots. These results were further supported by the significant negative correlation found between Si and As in the shoots. However, a growth inhibition of rice plants was also observed due to As toxicity from the addition of excessive treatments of Si into As-contaminated soils. Therefore, the results of this study suggest that foliar applications of Si are not able to decrease As accumulation in rice seedlings, but that the application of moderate amounts of Si into As-contaminated soils could effectively reduce As uptake by rice seedlings.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 5
Claim · model-written summary
Foliar silicon rates did not significantly change silicon concentrations in rice shoots.
- Taxon
- rice
Oryza sativae1 - Organ / stage
- shootse0
- Treatment
- Si foliar applicationse0
- Outcome
- Si concentrations in shootse0
- Direction
- no significant differencese0
- Comparator
- different Si foliar applicationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there were no significant differences in Si concentrations in shoots among different Si foliar applications”
e1“rice (Oryza sativa L.)”
Claim · model-written summary
Foliar silicon did not significantly affect rice seedling growth.
- Taxon
- rice seedlingsOryza sativae0
- Treatment
- Si foliar applicationse1
- Outcome
- growthe0
- Direction
- no significant effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it had no significant effect on the growth and As accumulation in rice seedlings”
e1“Si foliar applications”
Claim · model-written summary
Foliar silicon did not significantly affect arsenic accumulation in rice seedlings.
- Taxon
- rice seedlingsOryza sativae0
- Treatment
- Si foliar applicationse1
- Outcome
- As accumulatione0
- Direction
- no significant effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it had no significant effect on the growth and As accumulation in rice seedlings”
e1“Si foliar applications”
Claim · model-written summary
Excessive soil silicon treatments inhibited rice growth because of arsenic toxicity.
- Taxon
- rice plantsOryza sativae0
- Treatment
- excessive treatments of Si into As-contaminated soilse0
- Outcome
- growthe0
- Direction
- inhibitione0
- Qualifier
- due to As toxicitye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a growth inhibition of rice plants was also observed due to As toxicity from the addition of excessive treatments of Si into As-contaminated soils”
Claim · model-written summary
The authors recommend moderate soil silicon application to reduce arsenic uptake by rice seedlings.
- Taxon
- rice seedlingsOryza sativae0
- Treatment
- application of moderate amounts of Si into As-contaminated soilse0
- Outcome
- reduce As uptakee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the application of moderate amounts of Si into As-contaminated soils could effectively reduce As uptake by rice seedlings”
The same questions in other papers
silicon atom · growth · Oryza sativa (rice)Results differ
13 papers in the same direction as this paper · 157 in the opposite direction
- positive
- positive
- positive
167 papers more in this group
See all 171 papers →silicon atom · nutrient: content · Oryza sativa (rice)Results differ
12 papers in the same direction as this paper · 164 in the opposite direction
- positive
- positive
- positive
173 papers more in this group
See all 177 papers →application · nutrient: content · Oryza sativa (rice)Positive and negative results
9 papers in the same direction as this paper · 212 in the opposite direction
- positive
- positive
- positive
218 papers more in this group
See all 222 papers →application · growth · Oryza sativa (rice)Positive and negative results
38 papers in the same direction as this paper · 274 in the opposite direction
- positive
- positive
- positive
309 papers more in this group
See all 313 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.