Abstract
Rice blast disease caused by Magnaporthe grisea (Hebert) Barr [teleomorph] is one of the most devastating diseases in rice plantation areas. Silicon is considered as a useful element for a large variety of plants. Rice variety MR219 was grown in the glasshouse to investigate the function of silicon in conferring resistance against blast. Silica gel was applied to soil while sodium silicate was used as foliar spray at the rates of 0, 60, 120, 180 g/5 kg soil and 0, 1, 2, 3 ml/l respectively. The treatments were arranged in a completely randomized design. Disease severity and silicon content of leaves were compared between the non-amended controls and rice plants receiving the different rates and sources of silicon. Silicon at all rates of application significantly (${\alpha}$ = 0.05) reduced the severity of disease with highest reduction (75%) recorded in treatments receiving 120 g of silica gel. SEM/EDX observations demonstrated a significant difference in weight concentration of silicon in silica cells on the leaf epidermis between silicon treated (25.79%) and non treated plants (7.87%) indicating that Si-fertilization resulted in higher deposition of Si in silica cells in comparison with non-treated plants. Application of silicon also led to a significant increase in Si contents of leaves. Contrast procedures indicated higher efficiency of silica gel in comparison to sodium silicate in almost all parameters assessed. The results suggest that mitigated levels of disease were associated with silicification and fortification of leaf epidermal cells through silicon fertilization.
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Claims 7
Claim · model-written summary
All silicon application rates significantly reduced blast severity.
- Taxon
- Rice variety MR219
Oryza sativae1 - Treatment
- Silicon at all rates of applicatione0
- Interactor
- Magnaporthe grisea
Pyricularia griseae3pathogen - Outcome
- severity of diseasee0
- Direction
- reducede0
- Comparator
- non-amended controlse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Silicon at all rates of application significantly (${\alpha}$ = 0.05) reduced the severity of disease”
e1“Rice variety MR219”
e2“non-amended controls”
e3“Magnaporthe grisea”
Claim · model-written summary
Silica gel at 120 g produced the largest disease reduction, 75%.
- Taxon
- riceOryza sativat0
- Treatment
- 120 g of silica gele0
- Interactor
- Magnaporthe griseaPyricularia griseae3pathogen
- Outcome
- diseasee4
- Direction
- reductione0
- Value
- 75%e0
- Comparator
- non-amended controlse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“highest reduction (75%) recorded in treatments receiving 120 g of silica gel”
t0“Rice Blast Fungus”
e1“Rice variety MR219”
e2“non-amended controls”
e3“Magnaporthe grisea”
e4“Silicon at all rates of application significantly (${\alpha}$ = 0.05) reduced the severity of disease”
Claim · model-written summary
Silicon treated plants had significantly greater silicon concentration in silica cells, 25.79% versus 7.87% untreated.
- Taxon
- riceOryza sativat0
- Treatment
- silicon treatede0
- Outcome
- weight concentration of silicon in silica cells on the leaf epidermise0
- Value
- 25.79%e0
- Qualifier
- 7.87%e0
- Comparator
- non treated plantse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significant difference in weight concentration of silicon in silica cells on the leaf epidermis between silicon treated (25.79%) and non treated plants (7.87%)”
t0“MR219 Rice Variety”
Claim · model-written summary
Silicon fertilization increased silicon deposition in silica cells compared with untreated plants.
- Taxon
- riceOryza sativat0
- Treatment
- Si-fertilizatione0
- Outcome
- deposition of Si in silica cellse0
- Direction
- highere0
- Comparator
- non-treated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Si-fertilization resulted in higher deposition of Si in silica cells in comparison with non-treated plants”
t0“MR219 Rice Variety”
Claim · model-written summary
Silicon application significantly increased leaf silicon content.
- Taxon
- riceOryza sativat0
- Treatment
- Application of silicone0
- Outcome
- Si contents of leavese0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of silicon also led to a significant increase in Si contents of leaves”
t0“MR219 Rice Variety”
Claim · model-written summary
Silica gel was more efficient than sodium silicate for almost all assessed parameters.
- Taxon
- riceOryza sativat0
- Treatment
- silica gele0
- Outcome
- efficiencye0
- Direction
- highere0
- Qualifier
- almost all parameters assessede0
- Comparator
- sodium silicatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher efficiency of silica gel in comparison to sodium silicate in almost all parameters assessed”
t0“MR219 Rice Variety”
Claim · model-written summary
The authors associated reduced disease with silicon fortified leaf epidermal cells.
- Taxon
- riceOryza sativat0
- Organ / stage
- leaf epidermal cellse0
- Treatment
- silicon fertilizatione0
- Interactor
- Magnaporthe griseaPyricularia griseae3pathogen
- Outcome
- mitigated levels of diseasee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mitigated levels of disease were associated with silicification and fortification of leaf epidermal cells through silicon fertilization”
t0“MR219 Rice Variety”
e1“Rice variety MR219”
e2“non-amended controls”
e3“Magnaporthe grisea”
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See all 7 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.