Determinação de nitrito em águas utilizando extrato de flores

Ramos, Luiz Antônio; Cavalheiro, Carla Cristina Schmitt; Cavalheiro, Éder Tadeu Gomes

doi:10.1590/s0100-40422006000500037

Cited by 18 publications

(16 citation statements)

References 19 publications

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“…Macroptilium lathyroides, popularly known as phasey bean, (Ramos, 2006) or wild bean, originates from the tropical part of South America and was introduced in tropical and subtropical India, Australia, Africa and Southeast North America (Ferreira, 2002). It is characterized as a legume with great nitrogen fixing capacity, and can be used as green fertilizer (Lorenzi, 2000); In several regions of Brazil it is used as forage for grazing (Vasconcelos et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Cytotoxic and Genotoxic Effects of Macroptilium lathyroides

et al. 2018

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The monitoring of phytochemicals with potentially toxic properties can be assessed by observing the physiological and cellular alterations of the test organism exposed. This present study aimed to evaluate the cytotoxic and genotoxic potential of aqueous extracts of leaves and roots of Macroptilium lathyroides weed on the cell cycle of lettuce. Bioassays were conducted in a germinator (25 oC) with aqueous extract at concentrations of 0, 5, 10, 20 and 40% p v-1, obtained from fresh leaves and roots. For biological, lettuce root meristems were used for the preparation of slides using the technique of squashing. All blades were observed with an optical microscope at a magnitude of 400x. A total of 5,000 cells were analyzed for each treatment, and the number of cells in each phase of mitosis was recorded. Possible presence of chromosomal abnormalities was verified, such as chromatid breaks, anafasic bridges, loss of whole chromosomes or micronuclei formation. These analyzes were conducted only on a qualitative level. Results showed that aqueous extracts of M. lathyroides mitotic caused reduced index with increased concentration. Genotoxic activity was also observed for both extracts tested, since composition resulted in cell cycle changes and chromosomal abnormalities.

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Section: Introductionmentioning

confidence: 99%

Cytotoxic and Genotoxic Effects of Macroptilium lathyroides

et al. 2018

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“…Macroptilium lathyroides é uma planta daninha popularmente conhecida como feijão-de-porco ou feijão selvagem (RAMOS, 2006). Caracteriza-se por ser uma espécie leguminosa com grande capacidade de fixação de nitrogênio, podendo ser utilizada até como adubo verde (LORENZI, 2000;VASCONCELOS et al, 2011).…”

Section: Introductionunclassified

Potencial alelopático do extrato aquoso das folhas e raízes frescas de Macroptilium lathyroides na germinação e no desenvolvimento inicial de alface

Silva

Yamashita

Rossi

et al. 2018

Rev. Ciênc. Agroamb.

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Resumo: A alelopatia caracteriza-se por efeitos na germinação ou no desenvolvimento das plantas, causados por substâncias químicas que são produzidas e liberadas por outras plantas. O presente trabalho teve como objetivo verificar o potencial alelopático do extrato aquoso de material vegetal fresco das folhas e raízes de Macroptilium lathyroides na germinação e no desenvolvimento inicial de plântulas de alface. Foram avaliadas concentrações na proporção peso/ volume (p.v-¹) 0, 5, 10, 20 e 40% dos extratos das folhas e raízes. O experimento foi organizado em esquema fatorial 2 x 5-o extrato de 2 partes da planta e 5 concentrações-, com 4 repetições de 25 sementes. As sementes foram mantidas em caixas gerbox sobre papéis umedecidos com os extratos das folhas e raízes. Diariamente foram realizadas avaliações de germinação e índice de velocidade de germinação (IVG) e, no fim de dez dias, de comprimento da parte aérea, comprimento radicular e massa seca de plântula. Os resultados demonstraram que os extratos de folhas e raízes dessa espécie possuem potencial alelopático, provocando interferência na germinação e no crescimento de alface, sendo que a ação inibitória exercida pelos extratos das folhas foi mais drástica sobre as variáveis analisadas. Palavras-chave: aleloquímicos; Lactuca sativa; inibição; plantas daninhas. Allelopathic potential of aqueous extract of fresh leaves and roots of Macroptilium lathyroides on germination and early growth of lettuce Abstract: Allelopathy is characterized by effects on plant development, caused by chemical substances produced and released by other plants. This study aimed at verifying the allelopathic potential of aqueous extract of fresh plant material from leaves and roots of Macroptilium lathyroides on germination and early development of lettuce. Concentrations were evaluated in weight / volume 0, 5, 10, 20 and in 40% of the extracts of leaves and roots. The experiment was organized in a 2x5 factorial scheme, with two parts of the plant and concentrations with four replicates of 25 seeds. The seeds were kept in gerboxes germibox on moistened paper with extracts of leaves and roots daily. Reviews of germination, IVG and, by the end of ten days, shoot length, root length and plantlet dry weight were performed. The results showed that the extracts of leaves and roots of this species present allelopathic effects, interfering on lettuce's germination and growth, and the inhibitory action exerted by the leaf extracts were analyzed on more drastic variables.

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“…A síndrome do bebê-azul ocorre porque o nitrito oxida os íons ferrosos da hemoglobina a íons férricos, gerando a meta-hemoglobina, que é menos eficiente na absorção e transferência de oxigênio para as células e favorece a formação potencial de nitrosaminas e nitrosamidas carcinogênicas, dois efeitos adversos à saú-de, potencializadores do aparecimento de células cancerígenas (Alaburda & Nishihara, 1998;Ramos et al, 2006).…”

Section: Introductionunclassified