Teste de condutividade elétrica para avaliação do potencial fisiológico de sementes de canola

Milani, Marília; Menezes, Nilson de Lemos; Lopes, Sidinei José

doi:10.1590/s0034-737x2012000300012

Cited by 16 publications

(23 citation statements)

References 8 publications

(5 reference statements)

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“…However, Cruz et al (2013) did not obtain satisfactory results for recommendation of a methodology for the electrical conductivity test in this same species. In other oilseed species, such as canola (Milani, Menezes;Lopes, 2012) and sesame seed (Torres et al, 2009), a reduction in time for assessment of the electrical conductivity test was also recommended.…”

Section: Lotmentioning

confidence: 99%

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Accelerated Aging and Electrical Conductivity Tests in Crambe Seeds

et al. 2015

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The aim of this study was to adapt the methodology of the accelerated aging and electrical conductivity tests for determination of physiological potential in crambe seeds. Six seed lots of crambe (cv. FMS Brilhante) were subjected to determination of moisture content, germination test, first count germination, emergence, and emergence speed index. For the accelerated aging test, the traditional methodology was used with water, and with a saturated potassium chloride and sodium chloride solution in three periods of exposure (24, 48, and 72 hours) at 41°C; the electrical conductivity test was performed with four pre-soaking treatments (0, 2, 4, and 8 hours) and four soaking periods (4, 8, 16, and 24 hours) at 25°C. The accelerated aging test with water for 72 hours and the electrical conductivity test with 2 hours of pre-soaking and assessment after 16 hours were effective for classification of the crambe seed lots in regard to physiological quality. Index terms:Crambe abyssinica, vigor, physiological quality. RESUMOConduziu-se esta pesquisa, com o objetivo de adequar a metodologia dos testes de envelhecimento acelerado e condutividade elétrica para determinação do potencial fisiológico em sementes de crambe. Seis lotes de sementes de crambe cultivar FMS Brilhante foram submetidos à determinação do teor de água, teste de germinação, primeira contagem de germinação, emergência, índice de velocidade de emergência. Para o teste de envelhecimento acelerado, foi utilizada a metodologia tradicional com o uso de água e com solução saturada de cloreto de potássio e cloreto de sódio em 3 períodos de exposição (24, 48 e 72 horas) a 41°C; o teste de condutividade elétrica foi realizado com quatro tratamentos de pré-embebição (0, 2, 4 e 8 horas) e quatro períodos de embebição (4, 8, 16 e 24 horas) a 25°C. O teste de envelhecimento acelerado com água por 72 horas e o teste de condutividade elétrica com 2 horas de pré-embebição e avaliação, após 16 horas, foram eficientes para a classificação dos lotes de sementes de crambe quanto à qualidade fisiológica. Termos para indexação:Crambe abyssinica, vigor, qualidade fisiológica.

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Section: Lotmentioning

confidence: 99%

“…In seeds of canola, a Brassicacea oilseed crop, Milani, Menezes and Lopes (2012) observed that the electrical conductivity test distinguished seed lots in regard to vigor after 8 hours. A similar recommendation is made by Torres et al (2009) for sesame seeds.…”

Section: Introductionmentioning

confidence: 99%

Accelerated Aging and Electrical Conductivity Tests in Crambe Seeds

et al. 2015

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“…seeds and two water volumes (25 and 50 mL), found that the release was considerably higher, regardless of the amount of seeds, when the seeds were soaked in a smaller volume of water. According to Milani et al (2012), the lower dilution of leachates (50 seeds in 25 mL) differentiates the quality of the batches in a shorter immersion time than the higher dilution (50 seeds in 50 mL).…”

Section: In B Napusmentioning

confidence: 99%

“…Similarly, Albuquerque et al (2001) determined the separate effect of the imbibition temperature in Helianthus annuus L. seeds. However, Milani et al (2012) observed a significant triple interaction (p < 0.05) when assessing the methodology of the electrical conductivity test (four batches; two volumes of water, 25 and 50 mL; and five immersion periods, 2, 4, 8, 16, and 24 h) using Brassica napus L. var. oleifera seeds, indicating that the seed batches behaved differently in each combination of water volume and immersion period.…”

mentioning

confidence: 94%

Tests for evaluating the physiological quality of pitaya seeds

Ortiz¹,

Moritz²,

Takahashi³

et al. 2015

Sem. Ci. Agr.

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Germination test is used to assess the physiological quality of seeds; however, since it is carried out under ideal conditions, this test has not been shown sufficient for this purpose. Instead, it is possible to use vigor tests, although the lack of standardized methodologies has reduced their applicability and reproducibility. Thus, this study aimed to develop methodologies for conducting tests of germination, accelerated aging, and electrical conductivity for the evaluation of the physiological quality of pitaya seeds. For this purpose, seeds from ripe Hylocereus undatus fruits were used. A completely randomized experimental design was used with four replications. The physiological quality of the seeds was assessed using germination, accelerated aging, and electrical conductivity tests, and the speed of germination index (SGI) and mean germination time (MGT) were determined for both the germination test and accelerated aging test. For the statistical analysis, we performed regression model adjustments and calculated the Pearson correlation coefficient (p < 0.05). The germination test for H. undatus seeds can be performed at 25 °C, with the aim of reaching the highest SGI and lowest MGT values. The accelerated aging test can be conducted at 43 °C for 48 h, because combining these factors favors the expression of seed vigor, allowing seeds to achieve the maximum SGI and minimum MGT, while reducing the time of the assay. The electrical conductivity test can be performed using 25 seeds at a temperature of 30 °C and a water volume of 10 mL, since under these conditions there is less interference from external factors on the leachate content of the solution. Key words: Accelerated aging, cactaceae, electrical conductivity, germination, Hylocereus undatus, vigor ResumoO teste de germinação é utilizado na avaliação da qualidade fisiológica de sementes; porém, devido à sua condução em condições ideais, não tem se mostrado suficiente para este propósito. Nesse sentido, há a possibilidade de recorrer aos testes de vigor, conquanto, a ausência de metodologias padronizadas tem dificultado a sua aplicabilidade e reprodutibilidade. Assim, o trabalho teve como objetivo determinar as metodologias dos testes de germinação, envelhecimento acelerado e condutividade elétrica, a fim de avaliar a qualidade fisiológica de sementes de pitaia. Para o estudo foram utilizadas sementes de frutos maduros de Hylocereus undatus. O delineamento experimental foi o inteiramente casualizado, com quatro repetições. A qualidade fisiológica das sementes foi avaliada pelos testes de germinação, envelhecimento acelerado e condutividade elétrica, além da determinação do índice de velocidade de germinação (IVG) e do tempo médio de germinação (TMG), ambos, em conjunto

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“…Pesquisas realizadas envolvendo esses testes (Silva et al, 2008;Carvalho et al, 2009) mostraram que ambos são satisfatórios na avaliação do potencial fisiológico de sementes de soja . O teste de condutividade elétrica baseia-se no fato de que o vigor está diretamente relacionado com a integridade do sistema de membranas celulares (Milani et al, 2012).…”

Section: Introductionunclassified

Qualidade de sementes de soja convencional e Roundup Ready (RR), produzida para consumo próprio e comercial

Melo

Brandão

Nóbrega³

et al. 2016

Rev. Ciênc. Agr.

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A garantia de sementes com elevado vigor e boa qualidade é fundamental para o sucesso de qualquer cultura. Sementes com baixo vigor podem apresentar dificuldades na germinação e emergência em campo, sob condições não favoráveis, como a falta de umidade ou baixas temperaturas. Portanto, os produtores, na tentativa de reduzir custos de produção, têm separado grãos da safra produzida para serem utilizados como sementes e isso tem sido cada vez mais frequente. Assim, este trabalho teve como objetivo avaliar o potencial fisiológico de sementes de soja Roundup Ready com sementes convencionais, e comparar sementes "salvas", produzidas por um produtor com sementes comerciais. As sementes foram caracterizadas em laboratório (pureza, massa de mil sementes e teor de água), submetidas a testes de vigor (envelhecimento acelerado, teste de frio e condutividade elétrica), teste de germinação, emergência em areia, índice de velocidade de emergência, crescimento de plântulas, comprimento de raízes e parte aérea das plântulas e matéria fresca e seca. Foi possível identificar maior pureza nas sementes comerciais do que nas sementes "salvas". Os lotes das cultivares convencionais apresentaram potencial fisiológico superior às cultivares de soja Roundup Ready, porém, entre as sementes "salvas" e comerciais não houve diferença quanto ao vigor.Palavras-chave: germinação, pureza, sistema de produção, teste de vigor. A B S T R A C TThe guarantee of seeds with high vigor and good quality is the most important characteristic for the success in soybean cropping. Seeds with low vigor may show some difficulty on germination and field emergence, mainly under adverse conditions, such as moisture deficiency or low temperatures. Thus, this study aimed at evaluating the physiological potential of Roundup Ready (RR) and conventional soybean seeds, 'saved' by a farmer as well as commercial seeds. Nevertheless, some farmers, in an attempt to reduce production costs, have already separated cropped grains produced to be used as seeds and it has been increasingly common. So, this trial aimed at evaluating the physiological potential of Roundup Ready soybean seeds with conventional seeds, and compare the 'saved' seeds, produced by a farmer with commercial seeds. The seeds were characterized in the laboratory (purity, mass of thousand seeds and moisture content). Vigor (accelerated aging, cold test and electrical conductivity test), germination test, emergence on sand, emergence speed index, seedling growth, roots and shoots length of seedlings as well as fresh and dry matter were determined. It was possible to identify that the commercial seeds showed higher purity when compared to the saved ones. Plots of conventional cultivars showed higher physiological potential, and there was no difference concerning the vigor between the 'saved' seeds and commercial ones.

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Teste de condutividade elétrica para avaliação do potencial fisiológico de sementes de canola

Cited by 16 publications

References 8 publications

Accelerated Aging and Electrical Conductivity Tests in Crambe Seeds

Accelerated Aging and Electrical Conductivity Tests in Crambe Seeds

Tests for evaluating the physiological quality of pitaya seeds

Qualidade de sementes de soja convencional e Roundup Ready (RR), produzida para consumo próprio e comercial

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