Armazenamento de sementes de salsa osmocondicionadas

Laura, Valdemir Antônio; Pereira, Sílvia Rahe; Ferreira, Eleane; Freitas, Mirianny Elena de

doi:10.1590/s0103-84782011005000069

Cited by 5 publications

(6 citation statements)

References 16 publications

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“…Despite the advantages of seed priming, one of the difficulties of this technique is the storage of seeds after the treatment since they lose the quality more quickly. Rodrigues et al (2011) observed the need for studies that seek to achieve a positive effect of priming as it minimizes deleterious effects during storage. Little is known about the behavior of primed tobacco seeds after storage.…”

Section: Introductionmentioning

confidence: 99%

Cryopreservation of primed tobacco seeds

et al. 2018

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Priming is a commercial technique used to increase the speed and uniformity of seed germination. However, the physiological quality of primed seeds is usually negatively affected during storage. Tobacco seeds of the cultivar BAT 2101 were used to investigate whether primed seeds could be cryopreserved. The most suitable substances, type of drying, and reheating during priming and cryopreservation of tobacco seeds were studied. Seed priming was performed with water, spermidine, and potassium nitrate, and drying was carried out with silica gel and a saturated saline solution. Seeds were cryopreserved in liquid nitrogen for 24 h and reheated in a water bath for two and five minutes and at ambient temperature. Tobacco seeds primed with spermidine and water can be cryopreserved without loss of physiological quality when quickly dried on silica gel and reheated in a water bath for two minutes.

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Section: Introductionmentioning

confidence: 99%

Cryopreservation of primed tobacco seeds

et al. 2018

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“…Accordingly, an increase in the temperature as a result of the respiration process is sufficient for the decomposition of lipids, and it increases the deterioration rate (Rodrigues, 2011). As shown in Figure 2, drying sunflower grains at different air temperatures affect the acidity index of the extracted oil substantially, at 5% probability.…”

Section: Resultsmentioning

confidence: 97%

<b>Yield and acidity indices of sunflower and soybean oils in function of grain drying and storage

2017

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ABSTRACT. The aim of this study was to identify the best conditions for drying and storing soybeans and sunflower grains to maintain their quality. In the first experiment, the soybeans were found to have initial moisture contents of 25 and 19% (w.b.) at different drying air temperatures (75, 90, 105, and 120°C). In the second step, the soybeans were evaluated after they were stored in paper bags and plastic polyethylene at temperatures of 3, 10 and 23°C for six months. In the third experiment, sunflower grains were tested after exposure to drying air temperatures of 45, 55, 65, and 75°C, and under storage conditions of 25°C and 50%, 20°C and 60%, 30°C and 40% RH over six months in paper bags and raffia. Drying the sunflower seeds at 45°C and storing them at 30°C and 40% RH led to higher oil yields and lower acid numbers. The oil that was extracted from the acid number was higher for soybean grains that were dried down from initial concentrations of 25% water at a drying air temperature of 120°C. The air temperature in storage at 3°C favored for yield and reduction of the soybean oil acidity.Keywords: postharvest, processing and quality.Rendimento e índice de acidez do óleo de girassol e soja em função da secagem e armazenamento dos grãos RESUMO. Este estudo teve como objetivo identificar as melhores condições para secagem e armazenamento de grãos de soja e de girassol para a qualidade. No primeiro experimento, avaliou-se grãos de soja com umidades iniciais de 25 e 19% (b.u.) em diferentes temperaturas do ar de secagem (75, 90, 105 e 120°C). Na segundo etapa, avaliou-se grãos de soja armazenadas em sacos de papel e de plástico polietileno nas temperaturas de 3, 10 e 23°C, durante seis meses. No terceiro experimento, testaram-se grãos de girassol na secagem com temperaturas do ar de 45, 55, 65 e 75°C e condições de armazenagem de 25°C e 50%, 20°C e 60%, 30°C e 40% de UR do ar, ao longo de seis meses, usando sacos de papel e ráfia. A secagem de grãos de girassol a 45°C e o armazenamento na condição de 30°C e 40% UR forneceu maior rendimento do óleo e menores índice de acidez. O índice de acidez do óleo extraído da soja foi maior para os grãos submetidos à secagem com teores iniciais de água de 25% e na temperatura do ar de secagem de 120°C. O armazenamento na temperatura do ar a 3°C foi favorável ao rendimento e a redução do índice de acidez do óleo de soja.Palavras-chave: pós-colheita, processamento e qualidade.

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“…Oil seeds should be stored with moisture contents lower than recommended for starch. Accordingly, an increase in temperature as a result of breathing process is sufficient for the decomposition of lipids and increased rate of deterioration (Rodrigues et al, 2011). Among the theories proposed to elucidate the process of deterioration in oilseeds such as sunflower, degeneration of enzyme inactivation and membrane have been the most studied.…”

Section: Resultsmentioning

confidence: 99%

“…Seed quality can be conceptualized as the sum of genetic, physical, physiological and health that affect the ability to give plants with higher productivity and seed storage can influence aspects of these, and yet it is an essential step for seed production (Hussain et al, 2006;Ferreira et al, 2010) program. In Brazil, the store operation is particularly important due to the tropical and subtropical climatic conditions with high temperatures and relative humidity of the air, which is unfavorable for the maintenance of seed quality (Rodrigues et al, 2011). Thus, given the need to reduce energy costs of the process and growing concern to ensure product quality during storage, research on different methods of storing become increasingly relevant day.…”

Section: Introductionmentioning

confidence: 99%

Alterations of the Quality of Sunflower Seeds in the Storage

Coradi¹,

Peralta²,

Fernandes³

et al. 2015

RBPA

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The storage of sunflower seeds in an adequate position to guarantee the quality and regulate the supply of raw material for the industries for the production of oils and bran. The objective of this study was to evaluate the yield of sunflower seed oil after drying and during storage in three conditions (25 0 C and 50%, 20% and 60 0 C, 30 0 C and 40%) in different packing (permeable and impermeable). Quality assessments of seed and oil yield were performed in zero, three and six months of storage times and analyzed by the average test were compared by Tukey test at 5 % probability. In storage there were greater reductions in oil, with the increase of storage temperature of 20 °C to 30 °C and reducing the relative humidity from 60% to 40%. Under these conditions, the yield of oil decreased from 65% to 17%. Waterproof packaging positively influenced the quality of sunflower seeds stored. The conditions of 25 °C and 50% RH air storage were more favorable for the quality of the seeds. The increase in time of storage under conditions of 30 °C and 40% RH air adversely affecting the quality of seeds. It was concluded that to increase the oil yield of sunflower seeds, the best storage conditions were 25 0 C and 50% RH air.

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Armazenamento de sementes de salsa osmocondicionadas

Cited by 5 publications

References 16 publications

Cryopreservation of primed tobacco seeds

Cryopreservation of primed tobacco seeds

<b>Yield and acidity indices of sunflower and soybean oils in function of grain drying and storage

Alterations of the Quality of Sunflower Seeds in the Storage

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