Qualidade fisiológica e armazenamento de sementes de plantas matrizes de Dimorphandra gardneriana Tulasne

The species Dimorphandra gardneriana Tulasne is a native Brazilian tree, propagated by seeds, whose fruits have high content of bioflavonoids rutin and quercetin, used in large scale by the pharmaceutical industry. Thus, it is necessary to evaluate the quality of the seeds produced in order to select seed plants for the seed harvest. The objective of this work was to evaluate the physiological quality of seeds of different D. gardneriana matrix plants, as well as their storage potential. In order to characterize the fruits and seeds of D. gardneriana, the biometrics were determined, while germination and vigor tests were performed (germination speed, seedling length and dry mass, conductivity electrical, accelerated aging, emergency in the field and tests of cold and x-rays). In order to store the seeds, different packages (aluminum foil, Kraft paper, cloth, plastic and bottles of polyethylene terephthalate - PET) were tested and in environments (laboratory natural, refrigerator and cold and dry chamber) for a period of 28 months, with evaluation of the water content, germination and vigor at the beginning and every 40 days of storage. The biometric characteristics of fruits and seeds of D. gardneriana are variable between the matrix plants, being indicated to 20 as one that owns seeds of larger size. By the results of the accelerated aging test the seeds of the matrix plant 11 are the most vigorous. Greenhouse and field emergence tests were efficient in separating the seeds of different D. gardneriana seedlings at vigor levels, and the seeds of the plants 19 and 20 were considered of better physiological quality. Cold and germination at low temperature highlight the seeds of the maturing plants 18, 19 and 20 as the most vigorous, whereas by the results of the tetrazolium test the most vigorous seeds were from the plants 2, 3, 6, 8 and 13. X - ray image was effective to evaluate the morphology of the seeds of different D. gardneriana matrix plants and its relationship with vigor. In storage, the seeds of D. gardneriana remained viable and with high physiological quality for up to 20 periods, with plastic and PET bottles being the most suitable for the storage of these seeds.A espécie Dimorphandra gardneriana Tulasne é uma árvore nativa brasileira, propagadada por sementes, cujos frutos possuem alto teor dos bioflavonóides rutina e quercetina, utilizados em larga escala pela indústria farmacêutica. Dessa forma torna-se necessário avaliar a qualidade das sementes produzidas com a finalidade de selecionar plantas matrizes para a colheita de sementes de qualidade. O objetivo do trabalho foi avaliar a qualidade fisiológica das sementes de plantas matrizes de D. gardneriana, assim como o seu potencial de armazenamento. Para a caracterização dos frutos e das sementes de D. gardneriana foi determinada a biometria, enquanto que para avaliação da viabilidade e vigor das sementes foram realizados testes de germinação e vigor (primeira contagem e índice velocidade de germinação, comprimento e massa seca de plântulas, condutividade elétrica, envelhecimento acelerado, emergência em campo e os testes de frio e raios X). Para o armazenamento das sementes foram testadas diferentes embalagens (papel alumínio, papel Kraft, pano, plástico e garrafas de polietileno tereftalato - PET) e em ambientes (natural de laboratório, geladeira e câmara fria e seca) por um período de 28 meses, com avaliações do teor de água, germinação e vigor no início e a cada 40 dias de armazemanto. Os caracteres biométricos de frutos e sementes de D. gardneriana são variáveis entre as plantas matrizes, sendo indicada a 20 como aquela que possui sementes de maior tamanho. Pelos resultados do teste de envelhecimento acelerado as sementes da planta matriz 11 são as mais vigorosas. Os testes de emergência em casa de vegetação e em campo foram eficientes na separação das sementes de plantas matrizes de D. gardneriana em níveis de vigor, sendo consideradas de melhor qualidade fisiológica as sementes das plantas matrizes 19 e 20. Os resultados dos testes de frio e germinação a baixa temperatura destacam as sementes das plantas matrizes 18, 19 e 20 como as mais vigorosas, enquanto pelos resultados do teste de tetrazólio as sementes mais vigorosas foram das plantas matrizes 2, 3, 6, 8 e 13. O teste de imagem de raios X foi eficaz para avaliar a morfologia das sementes de plantas matrizes de D. gardneriana e sua xxii relação com o vigor. No armazenamento, as sementes de D. gardneriana se mantiveram viáveis e com alta qualidade fisiológica por até 20 períodos, sendo as embalagens de plástico e garrafa PET as mais adequadas para o armazenamento destas sementes

Physiological and sanitary quality of seeds of Dimorphandra gardneriana Tul. treated with essential oils

Dimorphandra gardneriana, popularly known as fava d’anta, is a medicinal species whose fruits and seeds are used in the manufacture of medicines. The objective of this study was to evaluate the efficiency of clove (Syzygium aromaticum (L.) Merr. & L.M. Perry) and copaíba (Copaifera sp.) essential oils in antifungal treatment of seeds of D. gardneriana and their influence on physiological quality of the seeds. Two experiments were carried out in a completely randomized design using seeds treated with different concentrations of copaiba and clove oils (0.5, 1.0, 1.5, and 2.0 mL) and two controls—seeds were treated with distilled water or fungicide. The variables analyzed were: incidence of fungi in seeds in the first experiment and seed germination and vigor (first germination, length and dry mass of root and shoot of the seedlings) in the second one. The incidence of fungi of the genera Aspergillus sp., Penicillium sp., and Rhizopus sp. in the seeds was elevated. The copaiba oil at the concentrations used did not satisfactorily reduce the incidence of fungi in the seeds of D. gardneriana, while the treatment of the seeds with clove oil at concentrations of 2.0 and 0.5 mL reduced the incidence of Penicillium sp. and Rhizopus sp., respectively. Seed germination and vigor increased at concentrations of 2 mL of clove oil and 1.25 mL of copaiba oil.Dimorphandra gardneriana, popularly known as fava d’anta, is a medicinal species whose fruits and seeds are used in the manufacture of medicines. The objective of this study was to evaluate the efficiency of clove (Syzygium aromaticum (L.) Merr. & L.M. Perry) and copaíba (Copaifera sp.) essential oils in antifungal treatment of seeds of D. gardneriana and their influence on physiological quality of the seeds. Two experiments were carried out in a completely randomized design using seeds treated with different concentrations of copaiba and clove oils (0.5, 1.0, 1.5, and 2.0 mL) and two controls—seeds were treated with distilled water or fungicide. The variables analyzed were: incidence of fungi in seeds in the first experiment and seed germination and vigor (first germination, length and dry mass of root and shoot of the seedlings) in the second one. The incidence of fungi of the genera Aspergillus sp., Penicillium sp., and Rhizopus sp. in the seeds was elevated. The copaiba oil at the concentrations used did not satisfactorily reduce the incidence of fungi in the seeds of D. gardneriana, while the treatment of the seeds with clove oil at concentrations of 2.0 and 0.5 mL reduced the incidence of Penicillium sp. and Rhizopus sp., respectively. Seed germination and vigor increased at concentrations of 2 mL of clove oil and 1.25 mL of copaiba oil

FUNGOS ASSOCIADOS ÀS SEMENTES DE Enterolobium contortisiliquum: ANÁLISE DA INCIDÊNCIA, CONTROLE E EFEITOS NA QUALIDADE FISIOLÓGICA COM O USO DE EXTRATOS VEGETAIS

http://dx.doi.org/10.5902/1980509821090 The fungi are main micro-organisms associated with seeds, may cause damages, both in the field but also post-harvest and during storage. In this last phase, deterioration can occur by the action of specific fungi, affecting their physiological quality. The use of plant extracts with antimicrobial properties are promising and environmentally friendly alternatives to replace the protection promoted by fungicide application. The objective of this work was to evaluate the effectiveness of extracts of Allamanda blanchetti e Momordica charantia in concentrations of 10, 100, 500 e 1000 ppm on mycoflora and germination in seeds of Enterolobium contortisiliquum. Seeds were collected in different municipalities in the state of Paraiba (Areia, Arara, Conde and Sobrado). The lots were tested for germination and sanity. The evaluation of the incidence of fungus was made from the visualization of fungi by the method of incubation blotter test. Was used the health test 100 seeds per treatment which were immersed in 20 mL of extracts for five minutes, incubated in then Petri dishes on double layer of filter paper. 200 seeds were used in the germination test, with four replications of 25 seeds per treatment, divided into germitest paper and germinated at temperatures of 30 ± 2°C. The experimental design was completely randomized. It was found in the seeds of Enterolobium contortisiliquum the following fungi: Aspergillus niger, Aspergillus flavus, Rhizopus stolonifer, Penicillium sp., Curvularia lunata, Nigrospora sp. and Cladosporium sp. The extracts of Allamanda blanchetti and Momordica charantia at concentrations of 500 and 1000 ppm caused a reduction in the frequency of fungi. The extract of Momordica charantia at concentrations of 500 and 1000 ppm provided an increase in germination and first count, and reduce the percentage of dead seeds.http://dx.doi.org/10.5902/1980509821090Os fungos são os principais micro-organismos associados às sementes, podendo causar danos, tanto na fase de campo, como também na pós-colheita e durante o armazenamento. Nesta última fase, a deterioração pode ocorrer pela ação específica de fungos, afetando a qualidade fisiológica das sementes. A utilização de extratos de plantas com propriedades antimicrobianas são alternativas ecológicas e promissoras para substituir a proteção promovida pela aplicação de fungicidas. Objetivou-se nesta pesquisa avaliar a eficiência dos extratos de Allamanda blanchetti e Momordica charantia nas concentrações de 10, 100, 500 e 1000 ppm sobre a micoflora e germinação em sementes de Enterolobium contortisiliquum. As sementes foram coletadas em diferentes municípios do estado da Paraíba (Areia, Arara, Conde e Sobrado). Os lotes foram submetidos a testes de sanidade e de germinação. A avaliação da incidência de fungos foi feita a partir da visualização dos fungos através do método de papel de filtro. Utilizaram-se no teste de sanidade 100 sementes por tratamento, as quais foram imersas em 20 mL dos extratos por cinco minutos, em seguida incubadas em placas de Petri sobre dupla camada de papel de filtro. No teste de germinação utilizaram-se 200 sementes, distribuídas em papel germitest e germinadas à temperatura de 30 ± 2°C. O delineamento experimental utilizado foi o inteiramente casualizado. Constatou-se nas sementes de Enterolobium contortisiliquum os fungos: Aspergillus niger, Aspergillus flavus, Rhizopus stolonifer, Penicillium sp., Curvularia lunata, Nigrospora sp. e Cladosporium sp. Os extratos de Allamanda blanchetti e Momordica charantia nas concentrações de 500 e 1000 ppm causaram redução da frequência dos fungos. O extrato de Momordica charantia nas concentrações de 500 e 1000 ppm proporcionou o aumento na germinação e primeira contagem, além de reduzir o percentual de sementes mortas

FUNGI ASSOCIATED THE SEEDS OF Enterolobium contortisiliquum : ANALYSIS OF INCIDENCE, CONTROL AND EFFECTS ON PHYSIOLOGICAL QUALITY WITH THE USE OF PLANT EXTRACTS

Os fungos s\ue3o os principais micro-organismos associados \ue0s sementes, podendo causar danos, tanto na fase de campo, como tamb\ue9m na p\uf3s-colheita e durante o armazenamento. Nesta \ufaltima fase, a deteriora\ue7\ue3o pode ocorrer pela a\ue7\ue3o espec\uedfica de fungos, afetando a qualidade fisiol\uf3gica das sementes. A utiliza\ue7\ue3o de extratos de plantas com propriedades antimicrobianas s\ue3o alternativas ecol\uf3gicas e promissoras para substituir a prote\ue7\ue3o promovida pela aplica\ue7\ue3o de fungicidas. Objetivou-se nesta pesquisa avaliar a efici\ueancia dos extratos de Allamanda blanchetti e Momordica charantia nas concentra\ue7\uf5es de 10, 100, 500 e 1000 ppm sobre a micoflora e germina\ue7\ue3o em sementes de Enterolobium contortisiliquum. As sementes foram coletadas em diferentes munic\uedpios do estado da Para\uedba (Areia, Arara, Conde e Sobrado). Os lotes foram submetidos a testes de sanidade e de germina\ue7\ue3o. A avalia\ue7\ue3o da incid\ueancia de fungos foi feita a partir da visualiza\ue7\ue3o dos fungos atrav\ue9s do m\ue9todo de papel de filtro. Utilizaram-se no teste de sanidade 100 sementes por tratamento, as quais foram imersas em 20 mL dos extratos por cinco minutos, em seguida incubadas em placas de Petri sobre dupla camada de papel de filtro. No teste de germina\ue7\ue3o utilizaram-se 200 sementes, distribu\ueddas em papel germitest e germinadas \ue0 temperatura de 30 \ub1 2\ub0C. O delineamento experimental utilizado foi o inteiramente casualizado. Constatou-se nas sementes de Enterolobium contortisiliquum os fungos: Aspergillus niger , Aspergillus flavus , Rhizopus stolonifer , Penicillium , Curvularia lunata , Nigrospora sp. e ,Cladosporium sp. Os extratos de Allamanda blanchetti e Momordica charantia nas concentra\ue7\uf5es de 500 e 1000 ppm causaram redu\ue7\ue3o da frequ\ueancia dos fungos. O extrato de Momordica charantia nas concentra\ue7\uf5es de 500 e 1000 ppm proporcionou o aumento na germina\ue7\ue3o e primeira contagem, al\ue9m de reduzir o percentual de sementes mortas.The fungi are main micro-organisms associated with seeds, may cause damages, both in the field but also post-harvest and during storage. In this last phase, deterioration can occur by the action of specific fungi, affecting their physiological quality. The use of plant extracts with antimicrobial properties are promising and environmentally friendly alternatives to replace the protection promoted by fungicide application. The objective of this work was to evaluate the effectiveness of extracts of Allamanda blanchetti and Momordica charantia in concentrations of 10, 100, 500 and 1000 ppm on mycoflora and germination in seeds of Enterolobium contortisiliquum. Seeds were collected in different municipalities in the state of Paraiba (Areia, Arara, Conde and Sobrado). The lots were tested for germination and sanity. The evaluation of the incidence of fungus was made from the visualization of fungi by the method of incubation blotter test. Was used the health test 100 seeds per treatment which were immersed in 20 mL of extracts for five minutes, incubated in then Petri dishes on double layer of filter paper. 200 seeds were used in the germination test, with four replications of 25 seeds per treatment, divided into germitest paper and germinated at temperatures of 30 \ub1 2\ub0C. The experimental design was completely randomized. It was found in the seeds of Enterolobium contortisiliquum the following fungi: Aspergillus niger , Aspergillus flavus , Rhizopus stolonifer , Penicillium sp., Curvularia lunata , Nigrospora sp. and Cladosporium sp. The extracts of Allamanda blanchetti and Momordica charantia at concentrations of 500 and 1000 ppm caused a reduction in the frequency of fungi. The extract of Momordica charantia at concentrations of 500 and 1000 ppm provided an increase in germination and first count, and reduce the percentage of dead seeds

Jornalismo político no Facebook? As fanpages dos jornais O Estado do Maranhão(MA) e A Tarde (BA) como “distribuidoras” de informação sobre as eleições 2016

Este artigo analisa como as eleições de 2016 ganharam visibilidade na cobertura jornalística feita pelos jornais O Estado do Maranhão(MA) e A Tarde (BA), nas páginas do Facebook. Trata-se de um estudo comparado para compreender similaridades e diferenças no espaço destinado ao tema político-eleitoral em cada um dos jornais de diferentes localidades do Nordeste. A análise está amparada na importância da informação jornalística nos processos eleitorais, assim como no papel das redes sociais digitais no processo de circulação e recirculação de conteúdos informativos. A técnica de pesquisa empregada é a análise de conteúdo, a partir de uma abordagem quantitativa. O período de observação compreende toda a disputa eleitoral de 2016, na qual os dois veículos fizeram 1.871 postagens no Facebook

Superação de dormência e vigor em sementes de Fava-d’Anta (Dimorphandra gardneriana Tulasne)

The objective of this study was to evaluate the effciency of different methods of overcoming of dormancy in Dimorphandra gardneriana Tulasne seeds, aiming to provide technical and scientifc knowledge to enable the creation of a protocol for germination. In an experiment conducted at ‘Laboratório de Análise de Sementes’, Centro de Ciências Agrárias, Universidade Federal da Paraíba (CCA-UFPB), in a completely randomized experimental design, seeds of fava d’anta were subjected to the following treatments: control consisting of non-carifed seeds mechanically scarifed with sandpaper Nº 120, mechanically scarifed seeds with sandpaper and soaked in distilled water for 6, 12, 18 and 24 hours, seeds subjected to blunt the region opposite to the hilum of nail with pliers, seeds subjected to blunt the region opposite to the hilum of nail with pliers and put on immersion in water distilled for 6, 12, 18 and 24 hours, chemical scarifcation with concentrated sulfuric acid for 5, 10 and 15 minutes. After the treatments, the seeds were tested for germination and vigor (emergence, speed of germination and emergence, length and dry weight of roots and hypocotyl). Mechanical scarifcation with sandpaper and lopping followed by immersion in distilled water for six hours favor the percentage of seed germination and the seedling emergence of Dimorphandra gardneriana and treatments using sulfuric acid dramatically reduced the strength of these seeds.O objetivo neste trabalho foi avaliar a eficiência de diferentes métodos para a superação da dormência em sementes Dimorphandra gardneriana Tulasne, visando fornecer conhecimentos técnico-científicos que permitam a criação de um protocolo de germinação. Em um experimento realizado no Laboratório de Análise de Sementes do Centro de Ciências Agrárias da Universidade Federal da Paraíba (CCA-UFPB), em delineamento experimental inteiramente ao acaso, as sementes de D. gardneriana foram submetidas aos seguintes tratamentos: testemunha que consistiu de sementes não escarificadas, sementes escarificadas mecanicamente com lixa n° 120, sementes escarificadas mecanicamente com lixa e submetidas à embebição em água destilada por 6, 12, 18 e 24 horas, sementes submetidas ao desponte na região oposta ao hilo com alicate de unha, sementes submetidas ao desponte na região oposta ao hilo com alicate de unha e postas em embebição em água destilada por 6, 12, 18 e 24 horas, escarificação química com ácido sulfúrico concentrado por 5, 10 e 15 minutos. Após a aplicação dos tratamentos as sementes foram submetidas a testes de germinação e vigor (emergência, índice de velocidade de germinação e de emergência, comprimento e massa seca de hipocótilo e raízes). A escarificação mecânica com lixa e o desponte seguidos de imersão em água destilada por seis horas favorecem a porcentagem de germinação de sementes e emergência de plântulas de Dimorphandra gardneriana, e os tratamentos utilizando ácido sulfúrico reduziram drasticamente o vigor destas sementes

Estresse salino e diferentes temperaturas alteram a fisiologia em sementes de Clitoria fairchildiana Howard

Clitoria fairchildiana Howard, popularly known as sombreiro is a native tree widely used in urban landscaping due to its rapid growth and beauty of the its flowers. In addition, it provides excellent shade and its wood is used in many purposes. Thus, the work was carried out with the objective of determining the tolerance of the seeds of Clitoria fairchildiana Howard to salt stress on germination at different temperatures. The experiment was conducted in the Laboratory of Seed Analysis of the Center of Agricultural Sciences of the Federal University of Paraíba, Areia – PB state. To simulate the salt stress, sodium chloride (NaCl) diluted in distilled and deionized water to obtain the concentrations of 0.0 (control) was used as the solute; 1.5; 3.0; 4,5; 6.0; 7.5; 9.0 and 10.5 dS m-1, at constant 25 and 30 ° C and alternating 20-30 ° C temperatures. In the evaluation of the effects of the treatments, the following characteristics were determined: percentage, first count and germination speed index (IVG), as well as length and dry mass of seedlings (root and shoot). The experimental design was completely at random, with treatments arranged in a 3 x 8 factorial scheme (temperatures and salinity levels), in four replications. The percentage of germination and vigor of the seeds reduced with the increasing in the salinity levels, however, for those submitted to a constant temperature of 25 °C the percentage of germination was higher compared to the others. The decrease in the osmotic potentials of saline solutions (NaCl) in the germination medium causes a reduction in the germination and vigor of the seeds of Clitoria fairchildiana Howard, which are classified as glycophytes, with moderate tolerance to NaCl salt.Clitoria fairchildiana Howard, conhecida popularmente como sombreiro, é uma árvore nativa muito utilizada no paisagismo urbano devido ao rápido crescimento e beleza das flores, além disso, fornece excelente sombra e sua madeira é utilizada para diversas finalidades. Dessa forma, o trabalho foi realizado com o objetivo de determinar a tolerância das sementes de Clitoria fairchildiana Howard ao estresse salino na germinação em diferentes temperaturas. O experimento foi conduzido no Laboratório de Análise de Sementes do Centro de Ciências Agrárias da Universidade Federal da Paraíba, em Areia - PB. Para simular o estresse salino utilizou-se como soluto o cloreto de sódio (NaCl) diluído em água destilada e deionizada para obtenção das concentrações de 0,0 (controle); 1,5; 3,0; 4,5; 6,0; 7,5; 9,0 e 10,5 dS m-1, nas temperaturas de 25 e 30°C constantes e 20-30°C alternada. Na avaliação dos efeitos dos tratamentos determinaram-se as seguintes características: porcentagem, primeira contagem e índice de velocidade de germinação (IVG), bem como comprimento e massa seca de plântulas (raiz e parte aérea). O delineamento experimental foi inteiramente ao acaso, com os tratamentos dispostos em esquema fatorial 3 x 8 (temperaturas e níveis de salinidade), em quatro repetições. A porcentagem de germinação e o vigor das sementes reduziram com o aumento dos níveis de salinidade, no entanto, para aquelas submetidas à temperatura constante de 25°C a porcentagem de germinação foi superior em relação às demais. O decréscimo nos níveis de potencial osmótico das soluções salinas (NaCl) no meio germinativo provoca redução na germinação e no vigor das sementes de Clitoria fairchildiana Howard, as quais são classificadas como glicófitas, com moderada tolerância ao sal NaCl

Physiological and sanitary quality of seeds of Dimorphandra gardneriana Tul. treated with essential oils

Dimorphandra gardneriana, popularly known as fava d’anta, is a medicinal species whose fruits and seeds are used in the manufacture of medicines. The objective of this study was to evaluate the efficiency of clove (Syzygium aromaticum (L.) Merr. & L.M. Perry) and copaíba (Copaifera sp.) essential oils in antifungal treatment of seeds of D. gardneriana and their influence on physiological quality of the seeds. Two experiments were carried out in a completely randomized design using seeds treated with different concentrations of copaiba and clove oils (0.5, 1.0, 1.5, and 2.0 mL) and two controls—seeds were treated with distilled water or fungicide. The variables analyzed were: incidence of fungi in seeds in the first experiment and seed germination and vigor (first germination, length and dry mass of root and shoot of the seedlings) in the second one. The incidence of fungi of the genera Aspergillus sp., Penicillium sp., and Rhizopus sp. in the seeds was elevated. The copaiba oil at the concentrations used did not satisfactorily reduce the incidence of fungi in the seeds of D. gardneriana, while the treatment of the seeds with clove oil at concentrations of 2.0 and 0.5 mL reduced the incidence of Penicillium sp. and Rhizopus sp., respectively. Seed germination and vigor increased at concentrations of 2 mL of clove oil and 1.25 mL of copaiba oil

Emergência e crescimento inicial de plântulas de Platymiscium floribundum Vog. em função de diferentes posições e profundidades de semeadura

Platymiscium floribundum Vog., pertencente à família Fabaceae, pode ser utilizada no paisagismo, em reflorestamentos e na recomposição de áreas degradadas e de preservação permanente. Objetivou-se verificar o efeito da posição da semente e da profundidade de semeadura na emergência e crescimento inicial de plântulas de P. floribundum. O experimento foi realizado em delineamento inteiramente ao acaso, utilizando-se diferentes posições das sementes no substrato areia: hilo voltado para baixo (HB), hilo voltado para o lado, formando um ângulo de 90° em relação ao eixo imaginário com o substrato (HL) e hilo voltado para cima (HC), nas profundidades de semeadura de 0, 1, 2, 3, 4, 5 e 6cm. Avaliou-se a porcentagem, primeira contagem e índice de velocidade de emergência de plântulas, assim como o comprimento e massa seca das plântulas normais. Para o teste de emergência de plântulas de P. floribundum, a semeadura deve ser na profundidade de até 2,0cm com o hilo voltado para baixo

SUPERAÇÃO DA DORMÊNCIA DE SEMENTES DE Sapindus saponaria L.

Sapindus saponaria L. (Sapindaceae) is a species native to Brazil used in the recovery of degraded areas and has medicinal properties, but the dormancy of its seeds affects negatively the germination and fast obtaining of seedlings. The present study aimed to evaluate the efficiency of different methods for overcoming dormancy of Sapindus saponaria seeds. The treatments to overcome the seeds dormancy were: control - intact seeds; immersion in concentrated sulfuric acid (96% H2SO4 P.A) for 60, 70, 80 and 90 minutes; immersion in concentrated sulfuric acid for 60, 70, 80 and 90 minutes followed by immersion in distilled water at room temperature for 12, 24 and 36 hours; immersion in water at 70 °C for 10 to 15 minutes followed by exposure in a refrigerator (6 °C) for 30 minutes; immersion in water at 70 °C for 10 to 15 minutes followed by exposure in a freezer (-18 °C) for 30 minutes; heat shock by exposing the seeds in a forced air circulation oven regulated at 70 °C for 5, 10 and 15 minutes followed by the transference to refrigerator and freezer for 30 minutes. For comparison between treatments were evaluated emergence percentage, speed and first counting of emergence, shoot length and primary root, dry matter of shoots and roots. The immersion of the seeds in sulfuric acid for 80 minutes followed by imbibition in water for 24 hours is efficient to overcome the dormancy, to accelerate and to promote the emergence and growth of Sapindus saponaria