Atividade antioxidante de Hibiscus sabdariffa L. em função do espaçamento entre plantas e da adubação orgânica

Ramos, Diovany Doffinger; Vieira, Maria do Carmo; Formagio, Anelise Samara Nazari; Cardoso, Cláudia Andréa Lima; Carnevali, Thiago de Oliveira

doi:10.1590/s0103-84782011005000107

Cited by 32 publications

(16 citation statements)

References 14 publications

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“…The spacing did not influence on content of constituents, but the addition of poultry litter has enhanced the responses both in aqueous and ethanolic extract. The ethanolic extract has higher antioxidant activity (Ramos et al, 2011). The data indicate the importance of the continuity of phytochemical and cultivation studies and especially in the evaluation of other biological activities.…”

Section: Introductionmentioning

confidence: 78%

Phenolic compounds of Hibiscus sabdariffa and influence of organic residues on its antioxidant and antitumoral properties

et al. 2015

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The aim of this study was to evaluate the phenolic and flavonoids contents and the antioxidant and antitumoral activity of leaf and calyx methanolic extracts from Hibiscus sabdariffa (roselle) cultivated with poultry litter and organosuper  under three modes of application. The total phenolic content in the each extract was determined using the Folin-Ciocalteu reagent and for aluminium chloride flavonoids. The antioxidant parameters were analyzed using a 2, 2-diphenyl-1-picrylhydrazyl (DPPH . ) free radical scavenging assay. An antitumor colorimetric assay using sulforhodamine B. The highest contents of phenolic and flavonoids were observed in leaf extracts (389.98 ) demonstrou que ambos têm substâncias que podem contribuir para a ação seqüestradora de radicais livres. O extrato metanólico dos cálices mostrou seletividade na linhagem de leucemia (K-562), com valores de IC 50 de 0,12 mg mL -1 (organosuper  ) e 1,16 mg mL -1 (cama-de-

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Section: Introductionmentioning

confidence: 78%

Phenolic compounds of Hibiscus sabdariffa and influence of organic residues on its antioxidant and antitumoral properties

et al. 2015

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“…This suggests that the content of this secondary compound is related to genetic factors of the cassava plants, as indicated by Ramos et al (2011). This acid is present in plant tissues, and has inhibitory effects on the growth of fungi and the production of mycotoxins.…”

Section: Thementioning

confidence: 94%

“…In the interaction between the fertilization and time of leaf collection, a quadratic fit was only obtained at 30 d after nitrogen fertilization ( Figure 1), with the minimum response of the compound occurring at a dose of 70 kg ha -1 . Data obtained by Ramos et al (2011) showed that the contents of antioxidant flavonoids, including ferulic acid, in the ethanolic extract and in the hot aqueous extract of rosella leaves were significantly affected by the addition of poultry litter (substrate rich in N) to the plant crop. On average, there was a 18% increase in the hot aqueous extract content and a 16% increase in the ethanolic extract content between data obtained with and without poultry litter.…”

Section: Thementioning

confidence: 99%

“…This may be explained by the way it was applied to the pots, because although the irrigation performed after the addition of N favored the availability of the nutrient to the plants during this period, daily irrigation may have favored leaching over time. Plant secondary compounds are significantly affected by the fertilization, environmental conditions, and degree of maturation of the plant, in addition to genetic factors (RAMOS et al, 2011). This was the case with caffeic acid, which, regardless of the cultivar, exhibited an increasing linear response to the doses of N at 15 d after the application of N, with a content peak at a dose of 90 kg ha -1 .…”

Section: Thementioning

confidence: 99%

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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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“…Produz flores e folhas muito utilizadas como fonte para confecção de produtos fitoterápicos e alimentícios, sendo as flores boa fonte de vitaminas A, B e C, de cálcio, ferro, fósforo e aminoácidos (Freitas et al, 2013). As folhas e flores apresentam efeitos terapêuticos como antioxidantes (Ramos et al, 2011) e antibacterianas (Maciel et al, 2012).…”

Section: Introductionunclassified

Produtividade de vinagreira, pimenta rosa e carobinha cultivadas em sucessão a mucuna preta e feijão de porco

Moreira

Vieira

Heredia

et al. 2016

Rev. bras. plantas med.

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RESUMO: O uso de adubos verdes e/ou de plantas de cobertura é uma técnica que vem sendo difundida para o cultivo de espécies medicinais, por garantir a sustentabilidade do solo agrícola, ser flexível em seu uso e por melhorar a atividade biológica do solo. O objetivo do trabalho foi avaliar o uso de culturas de cobertura para incrementar a produção de massa de plantas de vinagreira, pimenta rosa e carobinha. Foram avaliadas duas espécies de leguminosas tropicais (mucuna preta e feijão de porco) como cobertura do solo e uma testemunha (sem cultura de cobertura) e três espécies medicinais (vinagreira, pimenta rosa e carobinha). O experimento foi arranjado em esquema de parcelas subdivididas, tendo nas parcelas as coberturas vegetais e nas subparcelas, as plantas medicinais. As plantas para a cobertura vegetal foram propagadas por semeadura direta no local de cultivo, enquanto as medicinais foram transplantadas diretamente entre a palhada da cobertura vegetal. A produção da mucuna preta foi de 8,37 t ha -1 de massa seca e do feijão de porco, de 14,37 t ha -1 de massa seca. O uso das culturas de cobertura contribuiu para uma maior biomassa microbiana do solo. As produções de massas frescas de folhas, caules e frutos de vinagreira e de frutos da pimenta rosa foram maiores quando cultivadas em sucessão às coberturas vegetais do solo, independente da espécie. As produções da carobinha foram semelhantes quando cultivadas em áreas com ou sem a cobertura. Visando à maior produtividade da vinagreira e pimenta rosa, são indicadas as culturas antecessoras feijão de porco e mucuna preta.Palavras-chave: plantas medicinais, Hibiscus sabdariffa, Schinus terebinthifolius, Jacaranda decurrens Cham. subsp. symmetrifoliolata.ABSTRACT: Productivity of roselle, Brazilian peppertree, and carobinha grown in succession to black velvet bean and jack bean. The use of green manure and/or cover crops is a technique that has been widespread for the cultivation of medicinal species, since it ensures the sustainability of agricultural soil, is flexible in its use, and improves biological activity in the soil. The purpose of this study was to evaluate the use of cover crops to increase biomass production of roselle, Brazilian peppertree, and carobinha plants. Two species of tropical legumes (black velvet bean and jack bean) were evaluated as ground covers, and also assessed were one control plot (without cover crops) and three medicinal species (roselle, Brazilian peppertree, and carobinha). The experiment was arranged in a split-plot design, where the plots had cover crops and the subplots contained the medicinal plants. The plants for the cover crop were propagated by direct sowing in the growing site, while the medicinal ones were transplanted directly between the cover crop. The dry mass production of the velvet beans and jack beans were 8.37 t ha-1 and 14.37 t, respectively. The use of cover crops contributed to the increased microbial biomass of the soil. The production of dry mass of leaves, stems, and fruits of roselle and fruits of Braz...

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Atividade antioxidante de Hibiscus sabdariffa L. em função do espaçamento entre plantas e da adubação orgânica

Cited by 32 publications

References 14 publications

Phenolic compounds of Hibiscus sabdariffa and influence of organic residues on its antioxidant and antitumoral properties

Phenolic compounds of Hibiscus sabdariffa and influence of organic residues on its antioxidant and antitumoral properties

Nitrogen fertilization in the contents of secondary compounds in cassava cultivars

Produtividade de vinagreira, pimenta rosa e carobinha cultivadas em sucessão a mucuna preta e feijão de porco

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