Teste de condutividade elétrica para avaliação da qualidade fisiológica de sementes de azevém (Lolium multiflorum L.)

Lopes, Rodrigo Ramos; Franke, Lucia Brandão

doi:10.1590/s0101-31222010000100014

Cited by 16 publications

(17 citation statements)

References 10 publications

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“…The correlation of data from a vigor test with seedling emergence in the field is crucial to consider the test successful because it should classify the lots into different levels of vigor as close as possible to seedling emergence in the field (ARAÚJO et al, 2011;LOPES;FRANKE, 2010;MARCOS-FILHO, 2015).…”

Section: Continuationmentioning

confidence: 99%

“…Therefore, the tests that efficiently assess the seed physiological potential should be identified for each species, thereby enabling obtaining consistent and reproducible results (LOPES; FRANKE, 2010;MARCOS-FILHO, 2015;STEINER et al, 2011). Quality control laboratories usually perform several vigor tests simultaneously, in addition to the germination test, to classify seed lots safely into different levels of physiological quality (SOARES et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

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Vigor tests in assessing the quality of signal grass seeds

Melo

Jeromini

Affonso

et al. 2017

SCA

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The correct assessment of the physiological quality of seed lots is necessary for the quality control program of companies. For such purpose, tests that detect differences in the physiological potential of seed lots and that meet the minimum market requirements. Thus, the study was conducted towards assessing the efficiency of laboratory tests in differentiating the quality of Brachiaria brizantha cv. Xaraés seed lots. Seeds from nine lots were assessed regarding water content, germination, first germination count, electrical conductivity and seedling emergence in sand in the laboratory (normal seedlings, first count and germination rate index), and the results were compared with those from the seedling emergence test conducted in the field. The experimental design used was completely randomized, with four replicates, and the Pearson correlation coefficient between the values from the germination, vigor and field seedling emergence tests was determined. The germination and seedling emergence in sand tests and the seedling emergence rate index efficiently assess the physiological quality of Brachiaria brizantha cv. Xaraés seed lots, providing data similar to those from seedling emergence in the field. Key words: Brachiaria brizantha. Germination. Forrage grass. Vigor tests. ResumoA avaliação correta da qualidade fisiológica dos lotes de sementes é necessária para o programa de controle de qualidade das empresas, para isso se utiliza testes que detectam diferenças no potencial fisiológico de lotes e que atendam às exigências mínimas para a comercialização. Assim, o trabalho foi conduzido com o objetivo de verificar a eficiência de testes de laboratório na diferenciação da qualidade dos lotes de sementes de Brachiaria brizantha cv. Xaraés. As sementes de nove lotes foram avaliadas quanto ao teor de água, germinação, primeira contagem de germinação, condutividade elétrica, emergência de plântulas em areia no laboratório (plântulas normais, primeira contagem e índice de velocidade de emergência) e os resultados comparados aos obtidos no teste de emergência de plântulas em campo. O delineamento experimental utilizado foi o inteiramente casualizado, com quatro repetições e determinado o coeficiente de correlação de Pearson entre os valores obtidos nos testes de germinação e de vigor e o teste de emergência em campo. O teste de germinação, emergência de plântulas em areia e índice de velocidade de emergência de plântulas em areia são eficientes na avaliação da qualidade fisiológica de lotes de sementes de Brachiaria brizantha cv. Xaraés, fornecendo informações equivalentes à emergência de plântulas em campo. Palavras-chave: Brachiaria brizantha. Germinação. Gramíneas forrageiras. Testes de vigor.

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Section: Continuationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Vigor tests in assessing the quality of signal grass seeds

Melo

Jeromini

Affonso

et al. 2017

SCA

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“…Accordingly (i.e., due to solute dilution), the 75-mL soaking volume was less efficient in distinguishing between the vigor of the two seed lots. Pereira and Martins Filho (2012) observed a similar pattern, with lower soaking volumes facilitating the discrimination of Solanum sessiliflorum seed lots with different qualities, and both Lopes and Franke (2010) and Milani et al (2012) reported that lower water volumes were more appropriate for measuring the electrical conductivity of Lolium multiflorum and Brassica napus seeds, respectively. Therefore, there appears to be a direct relationship between the seed vigor differentiation and soaking volume.…”

Section: Resultsmentioning

confidence: 83%

ELECTRICAL CONDUCTIVITY TEST IN Melanoxylon brauna SCHOTT. SEEDS (FABACEAE-CAESALPINIOIDEAE)

Ataíde

Borges

Flores

2018

Rev. Agric. Neotrop.

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The electrical conductivity test is a simple and rapid method for evaluating seed vigor. The aim of the present study was to optimize the electrical conductivity test for assessing the vigor of Melanoxylon brauna seeds by investigating the effects of seed number (25, 50, or 75), water volume (25, 50, or 75 mL), and soaking duration (24, 48, or 72 h). The seeds belonged to two lots (I and II) that were collected in 2010 and 2012, respectively, and were incubated in a germination chamber at 25 ºC. Electrical conductivity was determined using a conductivity meter Micronal model B220. The Lot II seeds performed better, in terms of vigor and germination, than the Lot I seeds, regardless of other parameters. In addition, electrical conductivity decreased with increasing water volume and soaking duration, regardless of seed lot. In order to most effectively evaluate the physiological quality of M. brauna seed lots, the electrical conductivity test should be performed using 50 seeds, 50 mL of water, and a 48-h soaking period.

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“…Esses testes Alguns testes de vigor podem ser realizados conjuntamente com o de germinação, a exemplo da primeira contagem de plântulas, realizada para facilitar a condução do teste de germinação, uma vez que a velocidade da germinação é uma das primeiras características a serem afetadas no processo de deterioração das sementes (COIMBRA et al, 2009;MACHADO et al, 2012;MARTINS et al, 2014). Portanto, deve-se identificar quais os testes de avaliação do potencial fisiológico são eficientes para as sementes de cada espécie, possibilitando a obtenção de resultados consistentes e reproduzíveis FRANKE, 2010;MARCOS-FILHO, 2015;STEINER et al, 2011). Os laboratórios de controle de qualidade costumam utilizar vários testes de vigor simultaneamente, além do teste de germinação, para classificar com maior segurança os lotes de sementes em diferentes níveis de qualidade fisiológica (SOARES et al, 2010).…”

Section: Introductionunclassified