Silício no progresso da mancha marrom na folha bandeira do trigo

Domiciano, Gisele Pereira; Rodrigues, Fabrício Ávila; Moreira, Wiler Ribas; Oliveira, Henrique Vaz de; Vale, Francisco; Filha, Maria Santina Xavier

doi:10.1590/s1982-56762010000300009

Cited by 9 publications

(8 citation statements)

References 12 publications

(15 reference statements)

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“…Na testemunha, que não recebeu tratamento, o silício foi encontrado de forma localizada. Domiciano et al (2010) estudando adubação com silício nas cultivares de trigo, BR-18 e BRS-208, detectaram que a concentração de sílica nas folhas bandeira das plantas adubadas foi 90,5% superior ao resultado obtido nas plantas não supridas com esse elemento.…”

Section: Resultsunclassified

Detecção de sílica em folha bandeira de trigo

Andrade

Miglioranza

2012

Sem. Ci. Agr.

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ResumoO silício é considerado um elemento benéfico às plantas, podendo trazer incrementos na produtividade e sanidade de diversas culturas. Nos vegetais, acumula-se principalmente nas áreas de máxima transpiração. Este trabalho teve por objetivo comparar o acúmulo de silício nas folhas bandeira de diferentes genótipos de trigo (Triticum aestivum L.), com o auxílio da Microscopia Eletrônica de Varredura (MEV). O experimento foi conduzido a campo, durante o ano agrícola de 2010, aonde foram utilizados oito genótipos de trigo (cultivares BRS 208, IPR 85, BRS Pardela, BRS 210, IPR 130, CD 104, BRS 220 e a linhagem WT 07106). Aos três meses após a semeadura, retiraram-se amostras das folhas para a análise de silício em MEV e espectroscopia de energia dispersiva de raios-X (EDS). Todos os genótipos avaliados acumularam corpos silicosos em suas epidermes foliares, sendo que esses corpos apresentaram formato arredondado e deposição diferenciada entre os diversos genótipos. Palavras-chave: Silício, Triticum aestivum, corpos silicosos, microscopia eletrônica de varredura, espectroscopia de energia dispersiva de raios-X AbstractSilicon is considered a beneficial element to plants and may increase productivity and health of many crops. In plants, silicon accumulates mainly in the areas of maximum transpiration. This study aimed to investigate and compare silicon accumulation in flag leaves of different genotypes of wheat (Triticum aestivum) with the aid of scanning electron microscopy (SEM). The experiment was conducted in the field during the growing season 2010, eight wheat genotypes (BRS 208, RPI 85, BRS Pardela, BRS 210, RPI 130, CD 104, BRS 220 and WT 07106 lineage) were used. Three months after sowing, the samples were collected from the leaves to perform the silicon analysis by SEM and energy dispersive X-ray (EDS). All genotypes accumulated silica bodies in their leaf epidermis, the bodies had a rounded shape and were deposited differently from one genotype to another.

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Section: Resultsunclassified

Detecção de sílica em folha bandeira de trigo

Andrade

Miglioranza

2012

Sem. Ci. Agr.

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“…It also offered protection from fungal attacks by providing greater resistance for flag leaves against the fungus Bipolaris sorokiniana (DOMICIANO et al, 2010). Other authors have also had positive results applying silicon to several crops, in adverse biotic and abiotic environments (NERI et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Foliar Application of Silicon on Yield Components of Wheat Crop

et al. 2017

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-Wheat is a major winter crop in southern Brazil. To maximize its productivity, there should be no biotic or abiotic restrictions that can affect the yield components. Thus, the objective was to evaluate the changes caused in the wheat crop yield components by silicon foliar application. The experiment was conducted in two growing seasons. In the first year, five wheat cultivars (Quartzo, Campo Real, Onix and Fundacep Lineage) were assessed and in the second year four were assessed (Mirante, Campo Real, Horizonte and Quartzo). In both years the crops were subjected to three doses of silicon (0, 3 and 6 L of silicon ha -1 ). The silicon was applied during the tillering, booting and anthesis stages. The yield components assessed were the number of plants, number of ears, number of fertile tillers, dry matter per plant, hectoliter weight, number of spikelets, number of grains per spike, weight of hundred grains, grain yield and harvest index. Most yield components did not respond to the silicon foliar application. The harvest index (first year) and the number of tillers (second year) however presented a quadratic relationship with the supply of silicon. The remaining differences were attributed to variations among the wheat cultivars.Keywords: Triticum aestivum L.. Cultivars. Nutritional management. APLICAÇÃO FOLIAR DE SILÍCIO NOS COMPONENTES DO RENDIMENTO DO TRIGORESUMO -O trigo é uma das principais culturas de inverno na região Sul do Brasil e para que a sua produtividade seja maximizada necessita que não haja restrições bióticas ou abióticas que possam afetar seus componentes de rendimento. Dessa forma, objetivou-se com esse trabalho avaliar as alterações provocadas nos componentes do rendimento da cultura de trigo pela aplicação de silício via foliar. O experimento foi conduzido em dois anos agrícolas. No primeiro ano foram avaliadas cinco cultivares de trigo (Quartzo, Campo Real, Horizonte, Ônix e Linhagem Fundacep), e quatro cultivares no segundo ano (Mirante, Campo Real, Horizonte e Quartzo), em ambos os anos foram submetidas a três doses de silício (0, 3 e 6 L de silício ha -1 ). As aplicações de silício foram realizadas nas fases do afilhamento, alongamento e antese. Os componentes de rendimento avaliados foram o número de plantas, o número de espigas e o número afilhos férteis, matéria seca por planta, massa de hectolítro, número de espiguetas, número de grãos por espiga, massa de cem grãos, produção de grãos e índice de colheita. A maioria dos componentes de rendimento não respondeu a aplicação foliar de silício. Contudo, o índice de colheita (primeiro ano) e o número de afilhos (segundo ano) apresentaram incrementos de suas características com a adição da adubação com silício via foliar. As demais diferenças observadas são atribuídas às variações entre as cultivares de trigo. Palavras-chave:Triticum aestivum L.. Cultivares. Manejo nutricional.

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“…This analysis confirms the increase of veinal and interveinal silica bodies in the front view of the epidermis. Andrade, Andrade and Miglioranza (2012) and Domiciano et al (2010) detected a large concentration of silica in silicatefertilized wheat leaves, about 90% higher than in plants that did not receive this fertilizer.…”

Section: Silicon Mn Espessura Abaxial Epidermis Adaxial Epidermis Chlmentioning

confidence: 92%

Toxidez de manganês na planta de arroz atenuada pela ação do silício nos tecidos foliares

Júnior

Fontes

Dias-Pereira

et al. 2019

SCA

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Anatomical modifications of leaves and other organs associated with mineral nutrition have been observed in many plants. However, little is known about the quantitative effects of Si and Mn on the anatomy of plant leaves, especially in rice. This study aimed to quantify the tissue thickness of rice leaves and the density of silica bodies in rice leaves grown in a nutrient solution supplemented with Si and Mn and evaluate the possible effects of Si on Mn toxicity. Treatments were arranged in a 2×3 factorial scheme = six combinations of treatments, two doses of Si (0 and 2 mmol L-1), and three doses of Mn (0.5, 2.5, and 10 µmol L-1) in randomized complete block design with four replications. After 39 days in the nutrient solution with the respective treatments, anatomical and micromorphometric measures of the leaf blade were carried out to determine the thickness and area of leaf tissues. The data were submitted to analysis of variance (ANOVA) and Tukey’s multiple comparisons test of means(p?0,05). The abaxial and adaxial epidermal thickness, as well as the density of silica bodies increased with the addition of Si to the nutrient solution. This study demonstrated that Si reduced the number of vascular bundles and Mn reduced the thickness of the chlorenchyma with increasing doses. Manganese doses of up to 10 ?mol L-1 do not inhibit the uptake and deposition of silicon in rice leaf tissues. Higher Si concentration in the solution caused anatomical changes in the leaf, which was associated with a possible alleviation of Mn toxicity due to the higher concentration of Si in plants since this effect was observed mainly when Si was present in the nutrient solution.

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Silício no progresso da mancha marrom na folha bandeira do trigo

Cited by 9 publications

References 12 publications

Detecção de sílica em folha bandeira de trigo

Detecção de sílica em folha bandeira de trigo

Foliar Application of Silicon on Yield Components of Wheat Crop

Toxidez de manganês na planta de arroz atenuada pela ação do silício nos tecidos foliares

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