Teste de condutividade elétrica para sementes de feijão-mungo-verde

Araújo, Roberto Fontes; Zonta, João Batista; Araújo, Eduardo Fontes; Heberle, Elaine; Zonta, Flávia Miranda Garcia

doi:10.1590/s0101-31222011000100014

Cited by 35 publications

(31 citation statements)

References 12 publications

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“…There is 92% negative correlation between variables. These results agree with Araujo et al (2011), who also worked on a leguminous plant (green beans) and obtained similar negative results of Pearson's correlation values around 90% between germination and electrical conductivity.…”

Section: +supporting

confidence: 91%

Influence of foliar fertilization with manganese on germination, vigor and storage time of RR soybean seeds

et al. 2015

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RESUMOThis study aimed to evaluate the influence of foliar fertilizer doses containing Mn of phenological stages of suggested application in RR soybeans, to recover management damages with glyphosate at postemergence application on seed vigor in post-harvest and post six months storage. The seeds originated from a field experiment conducted , which included two applications of glyphosate, concomitant with foliar fertilizer in growth stages V4 and V6, with 0.00, 113.50 and 227.00 mg ha -1 doses of Mn 2+ . Germination, GSI (Germination Speed Index), electrical conductivity tests and the first count of seeds were conducted. The application of Mn did not affect the physiological quality of RR soy in postharvest. However, in post-storage, higher doses of Mn had a negative effect on tests of abnormal seedlings, GSI and electrical conductivity. The applications of Mn, regardless of the developmental stage, did not interfere in the germination and first count tests, with and without storage. The electrical conductivity test showed a higher correlation with the seed germination test in the post-harvest treatment. Influência da fertilização foliar com manganês para a germinação, vigor e tempo de armazenamento de sementes de soja RREste trabalho propôs avaliar a influência de doses de fertilizante foliar com Mn e de estádios fenológicos de aplicação sugeridas, em soja RR, para se recuperar de injúrias do manejo com glyphosate em pós-emergência, sobre o potencial fisiológico das sementes em pós-colheita e pós-armazenamento de seis meses. As sementes foram originadas de um experimento realizado a campo, que contou com duas aplicações do herbicida, concomitantes com fertilizante foliar, nos estádios fenológicos V4 e V6, com doses de 0,00; 113,50 e 227,00 mg ha -1 de Mn 2+ . Foram conduzidos testes de germinação, de IVG (índice de velocidade de germinação), de condutividade elétrica e de primeira contagem em sementes. A aplicação de Mn não influenciou a qualidade fisiológica da soja RR em pós-colheita. Já, em pós-armazenamento, as doses mais elevadas de Mn tiveram efeito negativo nos testes de plântulas anormais, de IVG e de condutividade elétrica. As aplicações de Mn, independentemente do estádio fenológico, não interferiram nos resultados dos testes de germinação e de primeira contagem, com e sem armazenamento. O teste de condutividade elétrica apresentou maior correlação com o teste de germinação de sementes no tratamento pós-colheita. Palavras-chave:Glycine max L., qualidade fisiológica, micronutriente, glyphosate. 447Influence of foliar fertilization with manganese on germination, vigor and storage time... Rev. Ceres, Viçosa, v. 62, n.5, p. 446-452, set-out, 2015

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Section: +supporting

confidence: 91%

Influence of foliar fertilization with manganese on germination, vigor and storage time of RR soybean seeds

et al. 2015

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“…Therefore, the authors recommended using the lowest number of seeds in order to reduce costs, because one of the main trouble for vegetables production is the high cost of seeds. Their results agree with the studies by Araujo et al (2011), in which one of the objectives of the laboratory tests is to minimize the quantity of seeds needed in addition to reducing the period necessary to carry out the test. However, adjustments to the electrical conductivity test methodology are important to ensure consistent results (DIAS et al, 2006).…”

Section: In B Napussupporting

confidence: 88%

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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“…Xaraés seeds ranged from 9 to 10% (Table 1), which is considered uniform because the maximum variation was 1%. This similarity between values is paramount to prevent differences in seed metabolic activity from affecting the physiological quality tests (ARAÚJO et al, 2011;COIMBRA et al, 2009;OLIVEIRA et al, 2014;SENA et al, 2015).…”

Section: Resultsmentioning

confidence: 99%

“…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%

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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Teste de condutividade elétrica para sementes de feijão-mungo-verde

Cited by 35 publications

References 12 publications

Influence of foliar fertilization with manganese on germination, vigor and storage time of RR soybean seeds

Influence of foliar fertilization with manganese on germination, vigor and storage time of RR soybean seeds

Tests for evaluating the physiological quality of pitaya seeds

Vigor tests in assessing the quality of signal grass seeds

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