Some significant functions of silicon to higher plants

Cheng, B. T.

doi:10.1080/01904168209363068

Cited by 35 publications

(23 citation statements)

References 27 publications

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“…However, these results should be viewed with care, since the amounts of iron plaque formed on root surface of rice plants grown in soil varied between root sections (Conlin and Crowder, 1989;Liu et al, 2005), and also between different growth stages even on the same root. Furthermore, Si application may promote the oxidation power of rice roots, which may lead to more deposition of iron oxides on the root surface under field conditions (Okuda and Takahashi, 1962;Cheng, 1982).…”

Section: Discussionmentioning

confidence: 99%

Is the effect of silicon on rice uptake of arsenate (AsV) related to internal silicon concentrations, iron plaque and phosphate nutrition?

Guo

Zhu

Liu

et al. 2007

Environmental Pollution

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Arsenate uptake by rice seedlings is affected by both Si (internal and external) and iron plaque on root surface. AbstractSolution culture experiments were conducted to investigate the effects of silicon (Si) on arsenate (As V ) uptake by rice. The addition of Si to the pretreatment or uptake solution significantly decreased shoot and root As concentrations (P < 0.001 and P < 0.05). The presence of Si in the pretreatment or uptake solution also significantly decreased shoot P concentrations (P < 0.001). The data demonstrated that both internal and external Si inhibited the uptake of As and P. Results of As uptake kinetics showed that the mechanism of the effect of Si on arsenate uptake is not caused by direct competition for active sites of transporters with As. The effect of Si on As uptake was not entirely mediated through the effect of Si on P uptake. Although the addition of Si to pretreatment solutions still significantly decreased shoot and root As concentrations, the extent of reduction became smaller when rice roots were coated with iron plaque.

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Section: Discussionmentioning

confidence: 99%

Is the effect of silicon on rice uptake of arsenate (AsV) related to internal silicon concentrations, iron plaque and phosphate nutrition?

Guo

Zhu

Liu

et al. 2007

Environmental Pollution

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“…These pH values were important to provide an adequate range (4.7-7.6) to maximum silicon absorption by rice (Cheong, 1982). The pH increase is explained by enhanced hydroxyl (OH -) concentration from the materials (Alcarde, 1992).…”

Section: Resultsmentioning

confidence: 99%

“…Among these factors, soil pH can be altered with liming materials, modifying the solubility of the monosilicic acid. This fact is important for rice, once maximum silicon absorption occurs within the 4.7-7.6 pH range (Cheong, 1982).…”

Section: Introductionmentioning

confidence: 99%

Soil reaction and absorption of silicon by rice

Camargo¹,

Pereira

Korndörfer

et al. 2007

Sci. agric. (Piracicaba, Braz.)

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The solubility and availability of silicon can be influenced by soil reaction. A pot experiment with a clayey textured Rhodic Acrustox was conducted under greenhouse conditions to evaluate the effect of soil reaction on silicon availability to rice plants. The experiment was set up in a completely randomized design, using a factorial scheme (4 × 4) with four materials (calcitic lime, calcium and magnesium silicate, pure silicic acid, and wollastonite), four rates (0, 2500, 5000 and 7500 mg per 5 kg-pot) and four replicates. After 60 days, dry matter yield and silicon absorption by the rice shoot plants, pH CaCl2 , and soluble silicon (0.5 mol L -1 acetic acid and 0.01 mol L -1CaCl 2 ) in the soil were evaluated. The materials increased soil pH as the applied rates increased, except silicic acid. Soluble silicon extracted by 0.5 mol L -1 acetic acid also increased with applied rates. For calcium chloride, soluble silicon increased in the soil only with wollastonite and calcium and magnesium silicate, agreeing with its total content. Silicon absorption by the above-ground part of the rice plants was linearly correlated with rates of wollastonite, followed by calcium and magnesium silicate, silicic acid and calcitic lime. Soil pH increase with lime was not sufficient to provide silicon to the rice. The 0.01 mol L -1 CaCl 2 soluble silicon had the best correlation with silicon absorption by plants. More studies are necessary under field conditions and other soils to corroborate the presented results. Key words: Oriza sativa, soil, calcitic lime, silicate REAÇÃO DO SOLO E ABSORÇÃO DE SILÍCIO PELO ARROZRESUMO: A solubilidade e disponibilidade de silício podem ser influenciadas pela reação do solo. Com o objetivo de estudar o efeito da reação do solo sobre a disponibilidade de silício para a cultura do arroz, foi conduzido experimento em Latossolo Vermelho álico textura argilosa em casa-de-vegetação. O experimento foi conduzido em fatorial 4 × 4, delineamento em blocos inteiramente casualizados e quatro repetições. Quatro materiais (calcário, silicato de cálcio e magnésio, ácido silícico puríssimo e wollastonita) foram aplicados em doses equivalentes a 0, 2500, 5000, 7500 mg por vaso de 5 kg. Após 60 dias, foram avaliadas produção de matéria seca, absorção de silício da parte aérea do arroz, pH CaCl2 , silício extraído em ácido acético (0,5 mol L ) no solo. Os materiais aumentaram o pH do solo com as doses, exceto o ácido silícico. O silício solúvel em ácido acético foi crescente com as doses dos materiais. Para o CaCl 2 , apenas houve aumento de silício solúvel no solo com as doses de wollastonita e silicato de cálcio e magnésio, concordando com seu teor total. A absorção de silício pela parte aérea do arroz foi linearmente crescente com as doses da wollastonita, seguida do silicato de cálcio e magnésio, ácido silícico e calcário. O aumento do pH do solo com calcário não foi suficiente para fornecer silício ao arroz. O silício extraído com CaCl 2 0,01 mol L -1 apresentou maior correlação com a absorção de si...

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“…O silício, embora não seja considerado um nutriente (MAlAvoltA, 2006), pode trazer inúmeras vantagens ao crescimento e desenvolvimento das plantas devido à melhoria da sua capacidade fotossintética, com aumento da clorofila das folhas (ElAwAd et al, 1982) e ao posicionamento mais ereto das folhas, tolerância ao estresse hídrico pela redução da transpiração (fAriA et al, 2000), redução do acamamento (Cheong, 1982;ElAwAd et al, 1982), da incidência de doenças (RAid et al,1992) e pragas (Meyer e Keeping, 2005;KvedArAs et al, 2005a,b).…”

Section: Introductionunclassified

Absorção de silício, produtividade e incidência de Diatraea saccharalis em cultivares de cana-de-açúcar

Camargo¹,

Korndörfer

Foltran³

et al. 2010

Bragantia

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RESUMOA variabilidade na acumulação de silício entre cultivares de cana-de-açúcar pode estar associada à produtividade e incidência da broca-da-cana-de-açúcar, Diatraea saccharalis, mas são escassas as informações sobre o tema. Assim, o objetivo foi avaliar a absorção de Si pelas folhas diagnósticas e acúmulo na parte aérea e sua relação com produtividade, qualidade e infestação da broca-da-cana-de-açúcar em cultivares de cana-de-açúcar. O experimento foi desenvolvido em Tietê (SP), no período de março de 2007 a julho de 2008, em blocos casualizados com quatro repetições e nove cultivares (IAC 86 2480, IAC 91 1099, IAC 87 3396, IACSP 94 4004, IACSP 93 6006, IACSP 93 3046, IACSP 94 2094, IACSP 94 2101. A produtividade aos 16 meses foi superior a 100 t ha -1 , sendo maior para IAC 91-1099 e RB 86-7515, com maior altura e diâmetro respectivamente. A cultivar IAC 91-1099 propiciou maior teor de açúcares e menor de fibra. Não houve diferença no Si das folhas aos seis meses e, aos oito meses, 'IACSP 93-3046', 'IACSP 93-6006' e 'IAC 91-1099' proporcionaram maiores valores, superiores a 10 g kg -1 de Si. Maiores acúmulos de Si nas folhas foram verificados em 'IAC 91-1099' aos 10, 14 e 16 meses e, no colmo, para 'RB 86-7515' e 'IAC 91-1099' aos 10 e 12 meses. A análise das folhas diagnósticas aos seis meses e da planta inteira colhida aos 16 meses foi eficiente para caracterizar as diferenças na absorção de silício entre as cultivares. Não houve relação entre Si absorvido e produtividade e infestação da broca, que foi reduzida com o aumento do teor de fibra das cultivares.Palavras-chave: produção; nutrição; solo; broca-da-cana-de-açúcar. ABSTRACT SILICON UPTAKE, YIELD AND DIATRAEA SACCHARALIS INCIDENCE IN SUGARCANE CULTIVARSThe variability of silicon absorption in sugarcane cultivars can be associate with its yield and sugarcane borer (D. saccharalis) incidence. The objective of this work was to evaluate silicon uptake by the leaves and accumulation in total aerial plant and its relationship to yield, quality and stalk borer in sugarcane cultivars. The experiment was carried out at Tietê, SP during March 2007 to July 2008, randomized complete blocks design with four replications and nine cultivars (IAC 86-2480, IAC 91-1099, IAC 87-3396, IACSP 94-4004, IACSP 93-6006, IACSP-93-3046, IACSP-94-2094, IACSP 94-2101. Yields were superior to 100 t ha -1 at 16 months of age and IAC 91-1099 and RB 86 7515 cultivars showed the highest diameter and height, respectively. The IAC 91-1099 showed the highest values of sugar and lowest to fiber content. Silicon content in leaves collected at 6 months showed not significant differences. The IACSP 93-3046, IACSP 93-6006 and IAC 91-1099 showed the highest silicon content in the leaves at 8 months and they were superior to 10 g kg -1 Si. Higher silicon content in the leaves was found for IAC 91-1099 at 10, 14 and 16 months and, in bagasse, to RB 86-7515 at 10 and 12 months. The foliar analysis collected at 8 months and the total aerial plant, collected just before harvest, were efficient t...

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Some significant functions of silicon to higher plants

Cited by 35 publications

References 27 publications

Is the effect of silicon on rice uptake of arsenate (AsV) related to internal silicon concentrations, iron plaque and phosphate nutrition?

Is the effect of silicon on rice uptake of arsenate (AsV) related to internal silicon concentrations, iron plaque and phosphate nutrition?

Soil reaction and absorption of silicon by rice

Absorção de silício, produtividade e incidência de Diatraea saccharalis em cultivares de cana-de-açúcar

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