Avaliação do potencial fungicida de extratos etanólicos de Senna alata contra Monosparacus cannonballus / Evaluation of the fungicide potential of ethanolic extracts of Senna alata against Monosporascus cannonballus

Objetivou-se, neste trabalho, avaliar in vitro a atividade dos extratos alcoólicos de Senna alata (L.) Roxb. sobre Monosporascus cannonballus. O delineamento experimental foi inteiramente casualizado com esquema fatorial 3 x 6 + 1, sendo constituído por três partes da planta (caule, raiz e vagem), por seis concentrações (0,25; 0,50; 50; 75; 250; 500 ppm ) mais a testemunha, com quatro repetições por tratamento. As variáveis avaliadas foram: taxa de crescimento micelial (TCM), inibição do crescimento micelial (ICM) e área abaixo da curva do crescimento micelial (AACCM). A concentração de 500 ppm foi a mais eficiente, nas três partes vegetais avaliadas. O porcentual de inibição na referida concentração foi de 28,60 por cento, 36,70 por cento e 27,99 por cento para caule, raiz e vagem respectivamente. Diante dos resultados, observa-se que os extratos de S. alata indicam um forte potencial de controle para o fungo Monosporascus cannonballus.

The aim of this work was to evaluate the activity in vitro of the ethanolic extracts of Senna alata (L.) Roxb. over Monosporascus cannonballus. The experimental design was entirely randomized with factorial scheme 3 x 7 + 1, being constituted by three parts of the plant (root, stalk and green bean) for six different concentrations (0.25; 0.50, 50, 75, 250,500 ppm) plus the control, with four repeatitons for treatment. The available variables were: rate of micelial growth (TCM), inhibition of the growth micelial (ICM) and area under the curve of the growth micelial (AACCM). The concentration of 500 ppm was the most efficient ,in the three available vegetal parts. The percentual of inhibition in the concentration was of 28.60 percent, 36.70 percent e 27.99 percent for stalk, root and green bean respectively. Before of the results, the extracts of S. alata display high control potential for Monosporascus cannonballus fungi.

The Antimutagenic effect of extract from green bean (Phaseolus aurous) in lead acetate induced mice

40 male mice were divided into 4 groups: control [10], lead acetate intraperitoneal injected mice at dose 0.2mg/kg/day for 15 days [10], lead acetate + extract from the green bean tegument treated mice [10], and lead acetate + extract from total seeds of green bean [10]. The extract of green bean was used as drink at dose of 1,5g green bean/each mouse/day for 17 days (green bean was given to mice 2 days before injection of lead acetate). At dose of used lead acetate exerted clastogenic effect in bone marrow cells, but not exert in testicular cells: the frequency of structural aberrations in bone marrow cells have been significantly higher than that in control. The extract from tegument or total seeds of green bean reduced the frequency of chromosome aberrations caused by lead acetate.