Atividade da enzima bromelina emplantas de abacaxi (Ananas comosus L. Merril), sob condições de salinidade in vitro

The objectives of this work were to characterize pineapple plants (Ananas comosus L. Merril) cv. Smooth Cayenne, cultured in vitro, in saline medium, in relation to bromelian activity, identifying the parts of the plant with the highest bromelian activity. Also under aim was the study of the influence of saline stress on the enzyme activity. Axillary buds of pineapple were cultivated in vitro in MS medium, supplemented with 2 mg.L-1 BAP and 1 mg.L-1 NAA. The levels of salinity tested were: 0.57 g.L-1 NaCl, 1.15 g.L-1 NaCl, and 2.30 g.L-1 NaCl. Bromelian activity was evaluated in the development of buds, shoots, and roots. The results showed that bromelian activity was higher in buds at the highest salt concentration at 15 days. Cultured shoots showed bromelian activity decreasing in the saline treatments in all the collection, up to 60 days in culture. The roots showed higher bromelian activity in the roots in saline medium.

Efeito da salinidade e do esgoto orgânico sobre a comunidade zooplanctônica, com ênfase nos copépodes, do estuário do rio Itanhaém, Estado de São Paulo

The objective of this work is to analyze the effects of salinity and wastewater on the zooplankton community of the Itanhaém river estuary, São Paulo state. Samples of zooplankton as well as physical and chemical variables of water were collected in four sites, located between the coastal line and the superior part of the estuary, including a secondary channel where wastewater is thrown without previous treatment. The samples were collected in low and high tide in winter and summer. Results showed that the estuary presents a temporal and spatial variation of physical and chemical characteristics, especially salinity, in function of the tide and seasonal variation of rain. The high values of salinity occurred in winter and high tide. Zooplankton community was adapted to the dynamic of salinity, and marine and estuarine species occurred in the low part of the estuary in winter. Although the Itanhaém river estuary has the same temporal and spatial dynamic of other estuaries, the values of salinity are low when compared with others located in the southern coast of São Paulo. Consequently, mainly oligohaline and fresh water species constitute the zooplankton community. These characteristics are due to the great drainage area of the Itanhaém river basin. The waste water modified physical and chemical characteristics of water that now presents higher concentrations of nutrients, higher values of suspended matter and lower concentrations of oxygen. It was observed a positive relation between the density of nauplii of copepods and organic pollution in this estuary.

produção de mudas de maracujazeiro amarelo submetidas à salinidade em solo com biofertilizante bovino

The experiment was conducted in a greenhouse from May 1 to July 31, 2008, in Areia county, Paraiba State, PB, Brazil, in order to evaluate the effects of irrigation water salinity on initial growth of the passionfruit seedlings in non-saline substrate with and without bovine biofertilizer. The treatments were distributed in a completely randomized design, with three replications and twelve plants per plots, in a factorial arrangement 5 × 2 × 2, corresponding the former to the levels of salinity in the irrigation water: 0.5; 1.0; 2.0; 3.0 and 4.0 dS m-1, in soils with and without bovine biofertilizer applied at two moments (25 and 65 days after seedling emergence). The growth of the seedlings and the soil electrical conductivity were evaluated at the end of the experiment. The biofertilizer was diluted in a low saline water at a 1:1 ratio and was applied once two days before sowing, corresponding to 10% of the substrates volume. The increase in water salinity inhibited the growth in height of plants, leaf area and root length, but always to a lesser extent in the treatments with bovine biofertilizer. The increase in electrical conductivity of the irrigation water elevated the soil salinity, independently of the addition of biofertilizer.

Desenvolvimento Inicial de Plantas de Eucalyptus Platyphylla Submetidas A Níveis de Salinidade

The objective of this study was to evaluate the behavior of morphological Eucalyptus platyphylla when subjected to five levels of soil salinity. The research project was conducted in a greenhouse at the experimental area of the Department of Agricultural Engineering of the FCA / UNESP, Botucatu-SP, utilizing plastic pots filled with soil containing NaCl concentrations, in sufficient quantities to raise the level of electrical conductivity. The experiment was conducted in randomized blocks in factorial scheme 5 x 4, 5 electrical conductivities (1.41, 2.50, 4.50, 6.45 and 8.33 dS m-1) and four repetitions. The results showed that soil salinity did not significantly affect the following parameters: height, green mass and dry matter of shoot, and root and leaf area of the plants.

Comportamento do noni à salinidade da água de irrigação em solo com biofertilizante bovino

Salt excess in soil and water used for irrigation can cause significant loss of production and growth in cultivated plants. Among some options for reduction of negative effects of salts to plants in cultivated areas, fermented bio fertilizer has been used to grow vegetables and fruit tree irrigated with saline water. The study aimed at evaluating the behavior of the noni plant to salinity of the irrigation water in substrate with and with no bio fertilizer. Treatments were arranged in a randomized block design with four replications, using a 5 × 2 factorial arrangement. Five levels of electrical conductivity of irrigation water (0.5, 1.5, 3.0, 4.5, 6.0 dS m-1) were used in substrates with and with no bio fertilizer. Parameters were evaluated as follows: plant height, stem diameter, number of leaves, leaf area, shoot dry matter and water consumption. All evaluated variables were negatively affected by the increase in salt concentration of the irrigation water, but always with less intense effects in treatments with bio fertilizer.The bio fertilizer does not eliminate, but mitigates the negative effects of salts in noni plants.

Influência da salinidade do fluido na avaliação da compactação e da resistividade elétrica de dois solos

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Influência de diferentes doses de salinidade e níveis de água na produção de cenoura

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Desenvolvimento inicial de plantas de Eucalyptus platyphylla irrigado, em diferentes níveis de salinidade

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Fertirrigação e controle da salinidade no cultivo de beterraba em ambiente protegido

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

Desenvolvimento do tomate em diferentes níveis de irrigação e de doses de salinidade

Pós-graduação em Agronomia (Irrigação e Drenagem) - FCA

Salinidade e composição iônica da água na larvicultura do camarão-da-amazônia, Macrobrachium amazonicum

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Manejo da irrigação por gotejamento, com diferentes níveis de salinidade da água, na cultura do melão

Pós-graduação em Agronomia (Irrigação e Drenagem) - FCA

O efeito da salinidade no desenvolvimento larval do caranguejo-uçá, Ucides cordatus (Linnaeus, 1763) (Decapoda: Ocypodidae) no Norte do Brasil

O presente trabalho estudou o efeito da salinidade na sobrevivência e na duração do desenvolvimento larval do caranguejo-uçá, Ucides cordatus (do estuário do Rio Caeté, Norte do Brasil), até a fase de megalopa em sete tratamentos de salinidade (0, 5, 10, 15, 20, 25 e 30). A salinidade afetou significativamente a sobrevivência das larvas zoea, no entanto não afetou a duração do desenvolvimento larval (20,77 ± 1,56 dias). Nas salinidades 0, 5 e 10 houve total mortalidade das larvas zoea. Somente a partir da salinidade 15 observou-se um desenvolvimento completo até a fase de megalopa. A taxa de sobrevivência foi maior em salinidade 30 (72%) e menor em 15 (16%). A reduzida taxa de sobrevivência das larvas zoea de U. cordatus, em salinidades baixas, indica a necessidade de dispersão larval do estuário para as águas costeiras onde as condições de salinidade para o desenvolvimento larval são mais favoráveis. Caso contrário se não houvesse a dispersão, a reduzida salinidade das águas estuarinas no período chuvoso, causaria uma elevada mortalidade, afetando desta forma o recrutamento, a manutenção e o crescimento da população de U. cordatus nos manguezais.

Germinação de sementes de palmeiras quanto à tolerância a dessecação, salinidade e temperatura

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Resistência do mexilhão Perna perna (Linnaeus, 1758) proveniente de bancos naturais da baixada santista, a variações de temperatura, salinidade, tempo de exposição ao ar e determinação da incidência de parasitismo

Pós-graduação em Ciências Biológicas (Zoologia) - IBRC