Natural products, although frequently associated with beneficial effects and considered harmless, still require thorough analysis; therefore, their bioactive compounds need to be used caution. Biological assays using plant models represent an appropriate alternative for evaluating the cytogenotoxicity these products. In this study, phyto- cytotoxic potential of extracts from bark Rhamnus purshiana DC. a species widely treatment constipation was investigated due its anthraquinone content. To...

Copper oxide nanoparticles (CuO NPs) are employed in antifouling paints, and chromium (Cr2O3 have been used as a green pigment. Their extensive use can contaminate aquatic ecosystems, the toxicological effects of these NPs to biota poorly known. In this study, we evaluated acute toxicity induced by CuO Cr2O3 NPs, comparing with CuSO4 Cr(NO3)3 Cu2+ Cr3+ ion source, respectively, using microcrustacean Daphnia similis. The mean EC50-48h for was 0.064 mg L-1 0.015 L-1. tend agglomerate, which...

A hortaliça Brassica oleracea é uma cultura de grande importância econômica e social para os pequenos agricultores do país. espécie, por sua vez, enfrenta grandes desafios fitossanitários, principalmente com a Ascia monuste orsis, das pragas que mais causam danos esta cultura. O objetivo da pesquisa foi avaliar ação extrato aquoso sabueiro (Sapindus saponaria), em diferentes concentrações no controle orseis, o intuito mitigar causados pela mesma na oleracea. experimento realizado 4...

A formação de professores é um elemento crucial para a execução uma educação inclusiva qualidade, que vital o desenvolvimento habilidades e competências atendam à diversidade dos estudantes. Este trabalho justifica escolha do tema ao ressaltar necessidade melhoria substancial na docentes, situando os educadores como agentes transformação. O foco principal examinar inicial contínua professores, bem sua preparação manejar as diversas realidades presentes nas salas aula modernas. metodologia...

Ioxynil octanoate, considered to be non-genotoxic, is widely used as a post-emergence herbicide. However, extensive agricultural usage might potentially adversely affect non-target organisms, indicating the need for comprehensive toxicological reassessment. The aim of this study was investigate phytotoxic and cytogenotoxic effects attributed exposure herbicide on Allium cepa L. examining germination, early growth, cell cycle progression, genomic stability. Herbicide concentrations 52, 209,...

O potencial citotóxico e genotóxico dos efluentes bruto (EB) tratado (ET) de duas indústrias têxteis localizadas no sul Minas Gerais, que tratam seus conjuntamente na mesma estação, foi investigado utilizando-se o sistema-teste Allium cepa.A citotoxicidade determinada a partir parâmetros alongamento raízes índice mitótico (IM) avaliação da genotoxicidade constou determinação anormalidades cromossômicas (AC).As amostras foram testadas nas concentrações 0, 25, 50, 75 100% (v/v).Foi adotado um...

The objectives of this study were to perform the physicochemical characterization chitosan, evaluate its effects on germination, early growth, root anatomy and cell cycle two maize hybrids.The hybrids DKB 390 VTPRO (transgenic) used.DKB390 is from Monsanto, event number 89034, which expresses proteins Cry1A105 Cry2AB2.For physico-chemical following analyzes performed:, elemental analysis, total ash, infrared absorption spectroscopy, nuclear magnetic resonance, powder X-ray diffraction,...

Coumarins are widely distributed substances in plant species that promote phytotoxic effects, allowing them to be exploited as herbicides less harmful the environment, since many invasive have demonstrated resistance commercially available products. The derived coumarins used this study had not been tested models and their effect on plants was unknown. objective of evaluate action these bioassays with Lactuca sativa L., order select most responsive substance whose toxicity best elucidated by...

Abstract The ornamental plant sector is growing due to the development of new species and technologies. focus research extend shelf life cut flowers maintain quality customer satisfaction. Techniques such as storage at low temperatures, use preservative solutions, technologies nanotechnology can help floral stem. present review aims analyze various techniques used post-harvest stems. For this purpose, a systematic search was conducted on major indexing platforms for studies published in...

Some macrophytes species show a high growth potential, colonizing large areas on aquatic environments. Cattail (Typha angustifolia L.) uncontrolled causes several problems to human activities and local biodiversity, but this also may lead competition further for itself. Thus, the objective of study was investigate anatomical modifications T. plants from different population densities, once it can help understand its biology. Roots leaves were collected natural populations growing under low...

Toxic metals have become some of the main abiotic agents that influence stress organisms due to their numerous agricultural and industrial uses result in bioaccumulation toxicity at different levels, depending on type concentration environment. Aluminum lead are present as a anthropogenic activities cause soil contamination and, consequently, pollution effects producers such plants. In this review, we used meta-analysis techniques assess effect aluminum plant physiology. We calculated...

Objetivou-se com esse trabalho avaliar a fitotoxicidade de cinco concentrações chumbo na germinação, anatomia radicular, e divisão celular alface. Cipselas alface foram colocadas em placas Petri papel filtro 2,5 mL solução contendo 0,0; 0,5; 1,0; 2,0 5,0 mM Pb(NO3)2. As permaneceram câmara do tipo B.O.D. 25°C fotoperíodo 12 h, sendo avaliadas as seguintes variáveis: crescimento inicial, índice mitótico frequência anormalidades cromossômicas no meristema apical radicular. O delineamento...

Objetivou-se, com este trabalho, avaliar a influência espacial e temporal da fitotoxicidade citogenotoxicidade água do sedimento de córrego urbano quanto às características germinativas crescimento inicial Lactuca sativa. Amostras foram coletadas em 5 pontos Córrego Pântano (Alfenas, Minas Gerais), no período outubro 2010 julho 2011 as concentrações dos metais Cd, Pb Zn quantificadas. Os ensaios realizados amostras extratos aquosos sedimentos. parâmetros avaliados taxa germinação,...

The objective of this work was to evaluate the effects population density Typha angustifolia plants in anatomical and physiological characteristics. Plants were collected from populations high (over 50% colonization capacity) low (less than cultivated under controlled greenhouse conditions. both grown plastic trays containing 4 L nutritive solution for 60 days. At end period, relative growth rate, leaf area ratio, net assimilatory root/shoot anatomy, root catalase ascorbate peroxidase...

Cytogenetic studies were carried out on five accesses of interspecific hybrids Pennisetum purpureum and glaucum their parentals, which are part the Forage Germplasm Bank "Centro Nacional de Pesquisa Gado Leite" EMBRAPA, Brazil. The mitotic cytogenetic analysis, performed using stain by Schiff reactive, confirmed chromosome number 2n = 14, 28 21 for P. glaucum, hybrids, respectively. For each access, descriptions complement idiograms presented allowed to establish karyotypic relationships...

Hydrothiolation of 1-organylbuta-1,3-diynes and 1,4-diorganylbuta-1,3-diynes with the sodium organylthiolate anions, which were generated in situ by reacting diphenyl dibutyl di­sulfide NaBH4 ethanol, results regio-, stereo-, chemoselective formation (Z)-1-organylthio-4-organylbut-1-en-3-ynes (Z)-1-organylthio-1,4-diorganylbut-1-en-3-ynes, respectively.

A caracterização foliar em árvores é essencial para a sua identificação e utilização, bem como se compreender as suas relações com o ambiente. Neste trabalho, objetivou-se estudo da anatomia dos folíolos das características biométricas folhas de S. molle diferentes alturas na copa, função modificações ambientais fisiológicas promovidas. As foram coletadas três copa: base, meio alto copa uma população cultivada molle. Para analises anatômicas, fixadas FAA armazenadas etanol sendo,...