Ácido cianídrico em tecidos de mandioca em função da idade da planta e adubação nitrogenada

Oliveira, Natália Trajano de; Uchôa, Sandra Cátia Pereira; Alves, José Maria Arcanjo; Albuquerque, José de Anchieta Alves de; Souza, Everton Diel; Melville, Cirano Cruz

doi:10.1590/s0100-204x2012001000004

Cited by 12 publications

(9 citation statements)

References 21 publications

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“…In a study conducted by Oliveira et al (2012) it was concluded that the hydrocyanic acid (HCN) content in the 'Aciolina' cultivar had a positive response to increased doses of topdress N (30, 60, 150, and 330 kg ha -1 ). The synthesis of plant secondary compounds is more influenced by agricultural practices (fertilizers, application of manure, and burning of crop residues) than by seasonal factors.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen fertilization in the contents of secondary compounds in cassava cultivars

Gazola

Zucareli

Ringenberg

et al. 2018

SCA

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The production of chemical substances is a strategy of plants to defend against the attack of pest insects. The synthesis of secondary compounds in plants is influenced by genotype and cultural management, such as the use of nitrogen fertilizers. Thus, the objective of this work is to evaluate the effect of doses of nitrogen fertilizer over time on the production of secondary compounds in two industrial cassava cultivars. The experiment was carried out in a greenhouse (25 ± 5 °C) of Embrapa Soybean in Londrina, Paraná, with the cultivation of potted plants (4l) in a 2 × 4 × 3 factorial scheme, with five replications. Two genotypes of industrial cassava ('Baianinha' and 'Caiuá') and four different nitrogen doses (0, 30, 60, and 90 kg ha -1 ) were used, with sampling at 15, 30, and 45 d after fertilization. Nitrogen fertilization was performed 50 d after sprouting. In the apical leaves, the levels of rutin, caffeic, p-coumaric and ferulic acids were evaluated in a high performance liquid chromatograph (HPLC). Exploratory analyses were performed on the data variables to verify the assumptions for analysis of variance (ANOVA), such as the independence and normality of errors, homogeneity of treatment variances and non-additivity of the model (they were submitted to analysis of homogeneity and normality, respectively. After these tests, ANOVA and Tukey's test (p ≤ 0.05) were performed. For the quantitative data concerning the N rates, regression study analyzes were performed. The Caiuá cultivar was found to have a higher ferulic acid content. The caffeic acid content decreased over time after the application of N in both cultivars. The rutin content in both cultivars did not increase with an increase in nitrogen dose. At a dose of 90 kg ha -1 , both cultivars presented a lower p-coumaric acid content after 30 d. Key words: Caffeic acid. P-coumaric acid. Ferulic acid. Defensive compounds. Manihot esculenta. Rutin. ResumoA produção de substâncias químicas é uma estratégia de defesa das plantas ao ataque de insetos praga. A síntese de compostos secundários em plantas é influenciada pelo genótipo e pelo manejo cultural, como o uso de fertilizantes nitrogenados. Deste modo, o trabalho tem como objetivo avaliar o efeito de doses de nitrogênio sobre a produção de compostos secundários em duas cultivares industriais de mandioca ao longo do tempo. O experimento foi realizado em casa de vegetação semiclimatizada (25°±5°C) da

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Section: Introductionmentioning

confidence: 99%

Nitrogen fertilization in the contents of secondary compounds in cassava cultivars

Gazola

Zucareli

Ringenberg

et al. 2018

SCA

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“…There are several factors that can influence the concentration of glycosides among cultivars, among them, genetic, environmental, soil type, location, time of year, which may result in the concentration of up to 2000 mg kg -1 in tubers, as well as in leaves. Oliveira et al (2012), highlight that nitrogen fertilization and harvest time can influence the HCN content in plant parts. When N doses were between 219 and 241 kg ha -1 , there were higher accumulations of HCN (401 mg kg -1 ) in the cortex, and lower accumulation (332 mg kg -1 ) in the root pulp.…”

Section: Relevant Aspects Of Cassava Culturementioning

confidence: 99%

The importance of agro-economic characteristics for minimal cassava processing: A review

Barata

Gatti

Silva

et al. 2021

RSD

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Cassava (Manihot esculenta Crantz) is a crop of extreme economic and agronomic value because it has several varieties, it is highly nutritious and extremely important in the food industry in the generation of products for human consumption. The objective of the present study was to characterize the culture of cassava by means of its peculiarities, potential of the product called minimally processed cassava, to describe the methods used in the generation of this product to understand the dynamics of consumption of this product. Because it is a relatively easy crop and has low nutritional requirements, cassava is grown in most of the national territory, with a growing increase in production every year. The products generated from cassava are appreciated and sold in the national and international territory, the minimally processed cassava is among the products generated by this culture, of great economic value and of great acceptance in the consumer market. The work was carried out by means of a bibliographic survey that address relevant issues about cassava and generated products, mainly minimally processed table cassava to provide an assembled and relevant knowledge to the scientific community in agri-food technologies.

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“…Fertilizers application in cassava cultivation proved to be another factor limiting the production. When analyzing different levels of [17] observed there is a direct relationship between applied dosages with root production and length. Experiments performed by [18] corroboraterelation between macronutrientdosages with the increase of root diameter.…”

Section: Fertilization Managementmentioning

confidence: 99%

Technological Analyze of Cassava Production in the City of Campos Dos Goytacazes – RJ

Borsoi¹,

Freitas

Souza

et al. 2019

JEAI

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This study analyzes the technological conditioning factors of cassava production in the municipality of Campos dos Goytacazes-RJ, seeking to elucidate the limitations and technological barriers that have contributed to the decline of crop production and productivity. A descriptive and quantitative methodology was adopted, in which the Survey method was used to analyze the technological factors through a questionnaire applied to 157 cassava producers in the field. The results evidenced the low degree of modernization of cassava in the municipality of Campos-RJ, intensive and extractive land use, generally produced on a small scale and with a low level of capitalization and productivity of work and land. This context seems to stimulate a vicious cycle, of low performance of the crops and profitability, low capacity of accumulation of resources, and capital and technological possibilities, favoring a gradual process of discouragement of the production. Without the possibility of gains and accumulation of income, the degree of uncertainty and risk tend to increase, as adversities and external forces make the permanence and perpetuation of the activity even more difficult, to emphasize the climatic factors and obstacles of commercialization and market. Thus, the research reinforces the need to evaluate technological alternatives that fit the local culture, as well as mechanisms that make them accessible to producers, such as: technical assistance, rural credit, social organization, among other public policies which aim to reduce the aggravation of rural activity in the municipality.

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Ácido cianídrico em tecidos de mandioca em função da idade da planta e adubação nitrogenada

Cited by 12 publications

References 21 publications

Nitrogen fertilization in the contents of secondary compounds in cassava cultivars

Nitrogen fertilization in the contents of secondary compounds in cassava cultivars

The importance of agro-economic characteristics for minimal cassava processing: A review

Technological Analyze of Cassava Production in the City of Campos Dos Goytacazes – RJ

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