Silicon and rice disease management

Rodrigues, Fabrício Ávila; Datnoff, Lawrence E.

doi:10.1590/s0100-41582005000500001

Cited by 60 publications

(39 citation statements)

References 30 publications

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“…The results of this study showed that application of silica gel and sodium silicate effectively reduced the severity and incidence of rice leaf blast. These results further confirm previous reports (Cai et al, 2008;Datnoff et al, 1997;Rodrigues and Datnoff, 2005). The results also revealed that plants treated with silica gel suffered lower levels of disease severity as compared with those treated with sodium silicate.…”

Section: Discussionsupporting

confidence: 92%

Effect of Foliar and Root Application of Silicon Against Rice Blast Fungus in MR219 Rice Variety

Abed-Ashtiani¹,

Kadir²,

Selamat³

et al. 2012

The Plant Pathology Journal

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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 (α = 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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Section: Discussionsupporting

confidence: 92%

Effect of Foliar and Root Application of Silicon Against Rice Blast Fungus in MR219 Rice Variety

Abed-Ashtiani¹,

Kadir²,

Selamat³

et al. 2012

The Plant Pathology Journal

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“…This indicates that Si application reduces the expansion of lesion as score 4 and 5 only appeared on Si-treatment. This might be as a result of physical barrier created by Si in the cuticle layer to reduce lesion, through organo silicon compound that accumulated in the wall of epidermal cell (Volk et al, 1958;Rodrigues et al, 2001). …”

Section: Discussionmentioning

confidence: 99%

Empirical Study on Effect of Silicon Application on Rice Blast Disease and Plant Morphology in Indonesia

Siregar¹,

Husnain²,

Sato³

et al. 2016

JAS

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Si fertilizer was never used in rice cultivation by farmers in Indonesia. To evaluate the effect of Si application on blast disease, plant morphologies, and stomata formation on rice plant, a field experiment was conducted in West Java, Indonesia. Two treatments, Si+ (with 1000 kg·ha -1 of silica gel) and Si-(without Si application) were set in a randomized complete block design. The results showed that Si application in soil with high available Si 426 mg SiO 2 kg -1 significantly reduce leaf (p < 0.01) and neck (p < 0.05) blast disease infection and increased stomata density (p < 0.01). Si-had severer leaf blast infection than Si+ which could reach up to score 4 and 5. Si deposited on the tissue surface acts as a physical barrier by thickening the Si layer in cuticle which could decrease the number of blast lessions on leaf blades by limiting hypa penetration and invasion. Recently there was no report to prove whether Si deposition improves or changes the stomata density. The results confirmed that Si application have the potential of improving rice growth and yield through the increase of resistance to blast infection and increment in stomata density although they did not result in the yield increment in the present study.

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“…Silicium forms insoluble (phytoliths) and soluble aggregates (orthosilicic acid polymers), intertwined with cellulose and cell wall components, making them strong and flexible, thus protecting plant tissue against water, air and microorganisms action (Rodrigues and Datnoff, 2005). Vegetable physiologists consider silicium as an essential element for plants, however, has been reported that the presence of silicium benefit crops, by induction of resistance and protection against various biotic and abiotic factors attributed in part to the accumulation and polymerization in the cell walls, which constitutes a mechanical barrier against attack by pathogens and insects (Epstein, 1999).…”

Section: Discussionmentioning

confidence: 99%

Secondary Metabolite Changes in Pecan (<i>Carya illinoensis</i>) Tissue Damaged by <i>Euplatypus segnis</i> Chapuis and Associated Fungi

Alvidrez-Villarreal¹,

Hernández-Castillo²,

García-Martínez³

et al. 2011

American Journal of Agricultural and Biological Sciences

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Problem statement:The borer insect Euplatypus segnis Chapuis is associated to Fusarium solani, Fusarium oxysporum, Alternariaalternata and Botryodiplodia theobromae fungi which produce regressive death in pecan (Carya illinoensis) trees. In the Mexico northern have been reported loses estimatesof more than 20% in production by the combination of insects and phytopathogen organisms. It also has been observed that some trees can survive with or without chemical treatment. Approach: The aim of present study was to determine the biochemical changes (contained of nitrogen, crude protein, terpen, condensed and hydrolyzable tannins, cellulose, lignin and silicium) in tissue of pecan trees cv. Western colonized by Ambrosia Borer (Euplatypus segnis Chapuis) and associated fungi complex. Three damaged trees and three healthy trees were sampled in three different plantations in each one of three Coahuila State localities. The responses variables were analyzed under a nested design, Tukey s test (p<0.05) was used to compare mean treatment differences. Results: Dataindicated that content of: terpenes, hydrolyzables tannins, cellulose, lignin and silicium increased significantly in the damaged trees in comparison to healthy trees. Conclusion: This results allowed inferring that these components increased as a chemical defense answer to insect invasion and to the enzymatic action of the associated phyto-pathogenic fungi.

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Silicon and rice disease management

Cited by 60 publications

References 30 publications

Effect of Foliar and Root Application of Silicon Against Rice Blast Fungus in MR219 Rice Variety

Effect of Foliar and Root Application of Silicon Against Rice Blast Fungus in MR219 Rice Variety

Empirical Study on Effect of Silicon Application on Rice Blast Disease and Plant Morphology in Indonesia

Secondary Metabolite Changes in Pecan (<i>Carya illinoensis</i>) Tissue Damaged by <i>Euplatypus segnis</i> Chapuis and Associated Fungi

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