Estudo experimental sobre a intoxicação de Gallus gallus domesticus com semente de crotalaria spectabilis. II efeito em aves na fase final de crescimento

This study was undertaken to investigate the toxic effect of Crotalaria spectabilis seeds added to the ration for commercial broilers during the final phase of growth. Ground seeds were added at different concentrations to the ration: 0.0% (control), 0.01%, 0.1% and 0.4%. Rations containing 0.4% caused symptoms of intoxication, beginning in the second week of the study. During the third week birds showed bristling, apathy, general weakness, distended abdomen and agglomeration. In the fourth week, four animals died. Necropsy revealed prominent ascites and severe lesions of liver, kidney and lung. Microscopic examination revealed necrosis of hepatocytes, inflammatory cell infiltration, hypertrophy and hyperplasia of biliary duct cells leading to atresia and cholestasis. Prominent cartilaginous and osseous nodules in the lungs were also present as well as degenerative, changes in the kidney tubules and necrosis of cells of the bursa. All the broilers receiving a ration with 0.1% of Crotalaria seeds showed ascites and slight lesions of the liver. The remaining groups showed no reduction in weight gains, lesions or clinical symptoms. It is concluded that broilers during the final phase of growth are sensitive to administrations of seeds of C. spectabilis in their ration. The presence of ascites and cartilaginous and osseous nodules in the lungs of the affected birds was also considered important.

Germinação da semente e produção de mudas de cultivares de alface em diferentes substratos

The aim of this paper was to evaluate the effects of the combinations of substrata on germination and development of seedlings of lettuce cultivars. The experiment was carried out in a nursery, in Mato Grosso do Sul State University. There wend compared the following combinations of substrata: washed sand + earthworm humus (2: 1); manure bovine + earthworm humus (2: 1); Plantmax(R) + earthworm humus (2: 1); washed sand + Plantmax(R) (2: 1) and manure bovine + Plantmax(R) (2: 1), and three lettuce cultivars: Crespa sem cabeca, Americana Julia and Baba de Verao. The experimental design was entirely at random, in a 5x3 factorial outline, with four replications and 16 seeds perplot. There were considered for evaluation 10 central seedlings per plot. The characteristics evaluated were: germination percentage (%), index of germination speed (IVE) and dry mass of the whole seedling (g). For all the analyzed variables, the cultivars Baba de Verao and Crespa sem cabeca presented the best results. Manure + humus was the best substratum to obtain seedling with larger development (vigor), althout it did not increase IVE and germination percentage.

Determinação de parâmetros genéticos em população de gonçalo-alves (Astronium fraxinifolium) através das características fisiológicas da semente

Seeds of Astronium fraxinifolium (Anarcadiaceae) were collected in two years, and submitted to tests of seed germination and vigour (first count, aging and electric conductivity), in order to verify the potencial of conservation and if variations in the seed quality presented on association with genetic parameters. Coefficient of heritability in average (ĥm 2) were 0.91 and 0.97 to germination; 0.90 and 0.96 to first count; 0.93 and 0.97 to aging and 0.95 and 0.99 to electric conductivity, for seeds collected in 1997 and 1998, respectively, evidencing a great heritability to all studied characteristics. Genetic variability was influenced more by environmental conditions of blooming and harvest of seeds than storage time.

Caracterização morfológica do fruto, da semente e desenvolvimento pós-seminal do abacateiro

A propagação do abacateiro é comercialmente, realizada por enxertia da variedade desejada sobre porta-enxertos seminais. No entanto, a literatura é discordante sobre a ocorrência de poliembrionia e tipo de fruto, nesta espécie. Em função do exposto, o trabalho objetivou caracterizar o tipo de fruto, aspectos morfológicos da semente e da plântula, além de avaliar o número de embriões existente. O abacateiro possui frutos do tipo baga, as sementes são monoembriônicas e exalbuminosas, a germinação é hipógea e a emergência das plântulas ocorreu 33 dias após a semeadura. A raiz primária é longa e de coloração branca e as raízes secundárias são curtas e filiformes. Os cotilédones são maciços e de coloração rosada. Foi possível observar a presença de múltiplos caulículos na semente de abacate, originados do colo. As sementes apresentam policaulia; o início da estabilização da emergência de plântulas ocorreu na oitava semana, sendo inviável para a propagação da espécie, manter essas sementes no viveiro por mais tempo.

Caracterização morfológica do fruto, semente e morfofunção de plântulas de sapoteira-preta (Diospyros ebenaster Retz.)

Diospyros ebenaster, originária do México e América Central, família Ebenaceae, é conhecida como sapota-preta. Os frutos podem ser consumidos in natura ou em sucos, como fonte de vitamina C. O objetivo deste trabalho foi caracterizar a morfologia do fruto, da semente e do processo germinativo da espécie. Os frutos foram caracterizados quanto à coloração, textura, consistência e teor de água no pericarpo, deiscência, massa, partes constituintes e dimensões. Para as sementes considerou-se: Massa, coloração, textura e consistência do tegumento, forma, presença e tipo de tecido de reserva e tipo, coloração, forma e posição do embrião. A descrição das plântulas foi realizada a partir da emissão da raiz primária até a expansão dos primeiros eófilos e início de fenecimento dos cotilédones. O fruto é carnoso, indeiscente, do tipo baga, polispérmico, globoso e achatado nos pólos. O epicarpo é liso, delgado e esverdeado. O comprimento médio dos frutos é 8,8 cm, o diâmetro médio 8,6 cm e a massa de 263 g. As sementes apresentam tegumento liso e cor castanho-médio. A massa de 100 sementes é 100,6 g. O comprimento médio das sementes é 2,2 cm, com 1,3 cm de largura. Possuem endosperma branco-Transparente e oleaginoso. O embrião é esbranquiçado e a germinação é epígea.

Emergência de plantas daninhas em função da posição da semente e quantidade de palha de cana-de- açúcar

This work was carried out to evaluate the effects of sugarcane straw density and positions of seeds of Euphorbia heterophylla, Mucuna cinereum, Digitaria nuda and Eleusine indica on emergence and initial development of plants. The experiment were arranged in a completely randomized design, with 15 treatments and four replications, in a factorial arrangement 3 x 5 with a additional control; the first factor was constituted by position of seeds related to the straw (under, between and on) and the second by five quantities of straw (1, 2, 4, 8 e 16 t ha -1) with a control without straw. At 15 days after sowing (DAS) it was realized evaluations of height, dry mass and emergence percentage for E. heterophylla and M. cinereum, and at 28 DAS it was analyzed dry mass and emergence percentage for D nuda e E. indica. Data obtained were submitted to F in variance analysis test and means were compared with Tukey at 5% probability. Emergence and initial development of E. heterophylla e M. cinereum were reduced with increasing of straw and were affected by seed position, but it was not inhibited in none of conditions, indicating aggressiveness of these weeds in sugarcane mechanized harvest conditions. D. nuda and E. indica emergence was not affected by seed position and coverage soil with 8 e 16 t ha -1 of sugarcane straw inhibited its emergence.

Reação de cultivares de cana-de-açúcar à broca do colmo

The objective of this study was to evaluate the reaction of ten sugarcane cultivars to Diatraea saccharalis under field conditions, using a randomized block design with treatments in factorial 2x10 with six replications. The first factor was represented by two levels of infestation (infested and not infested) by borer and the second one, by the ten sugarcane varieties (IAC87-3396, IAC91-1099, IACSP93-3046, IACSP94-2101, IACSP94-2094, IACSP94-4004, IACSP95-5000, IACSP96-3060, IACSP96-2042 and SP91-1115). The experiment was evaluated in two crop cycles: plant crop and first ratoon. All cultivars were attacked by the borer, being IACSP94-4004, IACSP96-2042 and SP91-1115 the most damaged cultivars with the highest infestation index. During the plant crop, plots infested by the borer presented higher fiber content than the ones not infested. During the first ratoon, non infested plants produced 10% less and presented lower purity and higher content of reducing sugars than the non-infested plants.

Danos do complexo broca-podridão à produtividade e à qualidade da cana-de-açúcar fertirrigada com doses de nitrogênio

The objective of this work was to evaluate the effect of nitrogen-fertigation on the damage caused by the borer-rot complex to the productivity and quality of fertigated sugarcane. The experiment was carried out in field, using a randomized complete block design, with four replicates and five N doses (0, 50 100, 150, and 200 kg ha-1) applied through drip irrigation. The following variables were determined: number of holes caused by Diatraea saccharalis (Lepidoptera: Crambidae); number of internodes infected with red rot; incidence percentage of red rot; stalk productivity; and sugar content. In laboratory, the attractiveness and the consumption of culm fragments by fourth instar caterpillars, in trials with or without choice, were evaluated. Nitrogen fertigation increased the incidence of D. saccharalis and red rot. The number of holes produced by the larvae was correlated with the occurrence of red rot. Sugar percentage reduced with the increase in the number of red rot affected internodes. Nitrogen doses did not affect the attractiveness of sugarcane culm fragments; however, higher N doses increased the consumption of these fragments by D. saccharalis caterpillars. Despite the damages to quality, nitrogen fertilization expressively enhanced the productivity of stalks and sugar.

Estudo da equivalência entre a lectina artin M obtida a partir da semente da jaca e a sua forma recombinante na afinidade por glicanas

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Efeito da suplementação com semente de girassol na performance reprodutiva de fêmeas bovinas de corte: Mariângela Bueno Cordeiro. -

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Isolado protéico de farinha de semente de goiaba (Psidium guajava): caracterização de propriedades funcionais e térmicas

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Pomada a base de óleo de semente de maracujá no tratamento de lesões cutâneas em coelhos

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Comportamento de genótipos de cana-de-açúcar em relação ao complexo broca-podridão causado pela ação de Diatraea saccharalis (Fabricius, 1794) (Lepidoptera: Crambidae) e microorganismos

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Análise do comportamento de estacas do tipo broca escavada com trado mecânico, solicitadas por esforços transversais

Pós-graduação em Engenharia Civil - FEIS

Morfologia, anatomia e desenvolvimento do fruto e semente de Manihot caerulescens Pohl. e M. tripartita Mull. Arg. (Euphorbiaceae)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)