Abstract
Silicon has versatile functions in plant biology, especially in plant defense and tolerance to both biotic and abiotic stressors. In this study, it was investigated if silicon could reduce the toxic effect of aluminum on rice. Aluminum was applied to OM4900 rice seedlings, and then their growth and sugar metabolism were determined. At doses of aluminum chloride of 100 and 200 µM, plant height was significantly enhanced and root elongation was reduced. The accumulation of photosynthetic pigments was tightly correlated with the aluminum concentration showing highest amounts at 400 µM. Sugar levels in roots and endosperm decreased upon aluminum addition. Aluminum toxicity in rice seedlings was relieved by addition of silicon in the form of sodium silicate. In the presence of 200 µM aluminum chloride, the addition of 100 mg/L sodium silicate to the hydroponic solution showed no contribution to plant growth or buildup of photosynthetic pigments. At this concentration, root development was not affected while it was at higher concentrations. Sodium silicate addition did not alter the reduction in sugar levels by aluminum. The presence of 200 µM aluminum chloride with or without sodium silicate in the growing solution significantly decreased silicon content in rice husks. Key words: Cultivar, metal, root, silicon, sugar.
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Claims 9
Claim · model-written summary
Aluminum chloride at 100 and 200 µM significantly enhanced rice seedling height.
- Taxon
- rice
Oryza sativat0e0 - Material
- OM4900t0
- Treatment
- aluminum chloride of 100 and 200 µMe0
- Outcome
- plant heighte0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At doses of aluminum chloride of 100 and 200 µM, plant height was significantly enhanced and root elongation was reduced.”
t0“OM4900 rice seedlings”
Claim · model-written summary
Aluminum chloride at 100 and 200 µM reduced root elongation.
- Taxon
- riceOryza sativat0e0
- Treatment
- aluminum chloride of 100 and 200 µMe0
- Outcome
- root elongatione0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At doses of aluminum chloride of 100 and 200 µM, plant height was significantly enhanced and root elongation was reduced.”
t0“OM4900 rice seedlings”
Claim · model-written summary
Photosynthetic pigment accumulation was correlated with aluminum concentration and peaked at 400 µM.
- Taxon
- riceOryza sativat0e0
- Treatment
- aluminum concentratione0
- Outcome
- accumulation of photosynthetic pigmentse0
- Direction
- higheste0
- Value
- 400 µMe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The accumulation of photosynthetic pigments was tightly correlated with the aluminum concentration showing highest amounts at 400 µM.”
t0“OM4900 rice seedlings”
Claim · model-written summary
Aluminum addition decreased sugar levels in roots and endosperm.
- Taxon
- riceOryza sativat0e0
- Organ / stage
- roots and endosperme0
- Treatment
- aluminum additione0
- Outcome
- Sugar levelse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sugar levels in roots and endosperm decreased upon aluminum addition.”
t0“OM4900 rice seedlings”
Claim · model-written summary
Sodium silicate relieved aluminum toxicity in rice seedlings.
- Taxon
- rice seedlingsOryza sativae0
- Treatment
- addition of silicon in the form of sodium silicatee0
- Outcome
- Aluminum toxicitye0
- Direction
- relievede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Aluminum toxicity in rice seedlings was relieved by addition of silicon in the form of sodium silicate.”
Claim · model-written summary
At 200 µM aluminum chloride, 100 mg/L sodium silicate did not contribute to plant growth or pigment buildup.
- Taxon
- riceOryza sativat0e0
- Treatment
- addition of 100 mg/L sodium silicatee0
- Outcome
- plant growth or buildup of photosynthetic pigmentse0
- Direction
- no contributione0
- Qualifier
- In the presence of 200 µM aluminum chloridee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the presence of 200 µM aluminum chloride, the addition of 100 mg/L sodium silicate to the hydroponic solution showed no contribution to plant growth or buildup of photosynthetic pigments.”
t0“OM4900 rice seedlings”
Claim · model-written summary
At 100 mg/L sodium silicate, root development was unaffected, whereas it was affected at higher concentrations.
- Taxon
- riceOryza sativat0e0
- Treatment
- this concentratione0
- Outcome
- root developmente0
- Direction
- not affectede0
- Comparator
- higher concentrationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At this concentration, root development was not affected while it was at higher concentrations.”
t0“OM4900 rice seedlings”
Claim · model-written summary
Sodium silicate did not alter aluminum-induced reduction in sugar levels.
- Taxon
- riceOryza sativat0e0
- Treatment
- Sodium silicate additione0
- Outcome
- reduction in sugar levelse0
- Direction
- did not altere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sodium silicate addition did not alter the reduction in sugar levels by aluminum.”
t0“OM4900 rice seedlings”
Claim · model-written summary
The presence of 200 µM aluminum chloride, with or without sodium silicate, significantly decreased silicon content in rice husks.
- Taxon
- riceOryza sativae0
- Organ / stage
- rice huskse0
- Treatment
- 200 µM aluminum chloride with or without sodium silicatee0
- Outcome
- silicon contente0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The presence of 200 µM aluminum chloride with or without sodium silicate in the growing solution significantly decreased silicon content in rice husks.”
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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.