Secagem estacionária de sementes de soja com ar desumidificado por resfriamento

Avelar, Suemar Alexandre Gonçalves; Levien, Alexandre Moscarelli; Peske, Silmar Teichert; Villela, Francisco Amaral; Baudet, Leopoldo

doi:10.1590/s0101-31222011000300008

Cited by 8 publications

(8 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Avelar et al (2011) state that the maximum temperature for the safe drying of seeds is dependent on the species, but generally ranges between 35 and 45 °C, and for partially dry seeds this temperature may be higher. Barbedo and MarcosFilho (1998) have subjected Caesalpinia echinata (common names include Brazilwood, Pau-Brasil, Pau de Pernambuco, Pernambuco tree, Nicaragua wood and Ibirapitanga (Tupi)) seeds to drying in greenhouses regulated at 40 and 50 °C, reducing the water content up to 8%, and have found no drying temperature effect on seed germination.…”

Section: Resultsmentioning

confidence: 99%

Physiological quality and expression of genes in seeds of Handroanthus serratifolius subjected to drying

et al. 2015

View full text Add to dashboard Cite

Physiological quality and expression of genes in seeds ofHandroanthus serratifolius subjected to drying ABSTRACT -Handroanthus serratifolius seeds are considered orthodox and have some mechanisms that assist in desiccation tolerance, like heat-resistant proteins and the presence of protective systems against free radical production. In order to investigate the drying effect on the quality of Handroanthus serratifolius seeds collected with 28% water content two methods were used: slow drying (30 °C) and fast drying (45 °C) until water contents equaled 20%, 15%, 10% and 5%. Seed quality was assessed by germination test, first count of germination, speed germination, emergence and speed emergence. The expression of heat-resistant proteins and enzymes catalase, esterase and isocitrate lyase was assessed by electrophoresis. The gene expression of sHSP17.5, CAT3 and ICL6 was quantified by real time PCR. Higher values of germination and vigor were obtained in seeds with 20% water content, subjected to fast drying. There was induction of heat-resistant proteins expression for both drying methods. There was variation in the electrophoretic pattern of catalase, esterase and isocitrate lyase in seeds subjected to different treatments. The gene expression in Handroanthus serratifolius seeds varies depending on methods of drying and water content of seeds. The drying of Handroanthus serratifolius seeds until the water content between 15 and 10% compromises their physiological quality. Index terms: isoenzymes, enzymes, qRT-PCR, Handroanthus serratifolius.Qualidade fisiológica e expressão de genes em sementes de Handroanthus serratifolius submetidas à secagem RESUMO -Sementes de ipê-amarelo são consideradas ortodoxas e dispõem de mecanismos que auxiliam na tolerância à dessecação, como proteínas resistentes ao calor e sistemas de proteção contra radicais livres. Para investigar o efeito da secagem na qualidade das sementes de ipê-amarelo coletadas com 28% de teor de água utilizaram-se dois métodos: secagem lenta (30 ºC) e secagem rápida (45 ºC) até atingirem teores de água na massa de sementes iguais a 20%, 15%, 10% e 5%. A qualidade das sementes foi avaliada por meio de testes de germinação e vigor. Foi avaliada a expressão das proteínas resistentes ao calor e das enzimas catalase, esterase e isocitrato liase. A expressão dos genes sHSP17.5, CAT3 e ICL6 foi quantificada por meio da técnica de qRT-PCR. Maiores valores de germinação e vigor foram obtidos em sementes com teor de água de 20%, submetidas à secagem rápida. Houve a indução de expressão de proteínas resistentes ao calor nos dois métodos de secagem. Ocorreu variação no padrão eletroforético das enzimas catalase, esterase e isocitrato liase entre os diferentes tratamentos. A expressão de genes varia em função dos métodos de secagem e teores de água das sementes. A secagem até os teores de água entre 15 e 10% compromete a qualidade fisiológica das mesmas.Termos para indexação: isoenzimas, enzimas, RTqPCR, ipê-amarelo.

show abstract

Section: Resultsmentioning

confidence: 99%

Physiological quality and expression of genes in seeds of Handroanthus serratifolius subjected to drying

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Some authors such as Krzyzanowski et al, (2006a); Krzyzanowski et al, (2006b); Levien et al, (2008); and Avelar et al, (2011), have already tested the heat pipe technology (HPT) and proved its efficiency in drying grains. In coffee, this drying method also showed results that corroborate our findings on the maintenance of grain quality.…”

Section: Number Of Defective Grainsmentioning

confidence: 99%

“…With the advances in drying air dehumidification (e.g., heat pipe technology -HPT), electricity became part of the drying process in a financially competitive scenario. In Brazil, HPT was firstly applied in peanut drying by Krzyzanowski et al, (2006a), as well as in soybean by Krzyzanowski et al, (2006b); Levien et al, (2008); and Avelar et al, (2011). These authors used dehumidified air to dry seeds and found a reduction in drying time and greater maintenance of seed physiological quality.…”

Section: Introductionmentioning

confidence: 99%

Price and Quality of Coffee (Coffea Arabica L.) Dried Using Air Dehumidified by Convection

et al. 2019

View full text Add to dashboard Cite

Grain drying processes have been improved to reduce costs and losses of coffee beverage quality. The objectives of this study were to evaluate the quality of coffee dried using air partially dehumidified before entering drying units (DUs) in four coffee-producing farms, as well as the effects of such process on coffee commercial value. The method consisted of obtaining three samples (triplicates) of coffee dried in both DUs and concrete terraces (control) for mean multiple comparisons. The following variables were analyzed for sieve #13 and hand-picked beans: defect number, cupping test, and pricing. Evaluations were carried out by three professional graders. The results showed that coffee dried in the DUs presented fewer broken grains, higher cupping score, and less negative factors of handsorting and defects. As a conclusion, it should be emphasized an average increase of 12.11% in price for coffee beans previously dehumidified.

show abstract

“…With the dehumidification of air resulting in greater potential for withdrawal of water from the seeds, this technique can accelerate the drying process, correlating with an energy savings. Avelar, Levien, Peske, Villela, and Baudet (2011) analysed the efficiency of stationary drying of soybean seeds with an apparatus similar to that used in this study and found it possible to dry soybean seeds on a commercial scale.…”

Section: Asmentioning

confidence: 99%

Immediate and latent effects of drying soybeans with dehydrated air

et al. 2019

View full text Add to dashboard Cite

New grain drying techniques have been improved to reduce post-harvest losses. The electric air dehumidifier (UTA 60®) is an example; it was installed at the ELLITT Seed Company for drying soybean seeds (TEC 7849) with random sample collection (DIC). Our objective was to evaluate the immediate and latent effects of the dehumidified air on the vigour of the seeds. Our vigour analysis method was based on the Rules for Seed Analysis (RAS), and our results showed an immediate significant difference in seedling percentage, but the germination level did not have an effect at 5% (Dunnett's test). In latent effects, at 5% (Tukey test), there was a reduction in the germination percentage and emergence rate, but it was not possible link such variations to the drying process. The germination potential was classified as "highest vigour", and it was possible to conclude that dehydrating drying air with UTA constituted a method capable of maintaining seed quality and germinative vigour.

show abstract

Secagem estacionária de sementes de soja com ar desumidificado por resfriamento

Cited by 8 publications

References 7 publications

Physiological quality and expression of genes in seeds of Handroanthus serratifolius subjected to drying

Physiological quality and expression of genes in seeds of Handroanthus serratifolius subjected to drying

Price and Quality of Coffee (Coffea Arabica L.) Dried Using Air Dehumidified by Convection

Immediate and latent effects of drying soybeans with dehydrated air

Contact Info

Product

Resources

About