Testes para avaliação do vigor de sementes de sorgo com ênfase à condutividade elétrica

Soares, Marcos Morais; Conceição, Patrícia Marluci da; Dias, Denise Cunha Fernandes dos Santos; Alvarenga, Eveline Mantovani

doi:10.1590/s1413-70542010000200017

Cited by 24 publications

(23 citation statements)

References 10 publications

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“…In that case, higher conductivity values and lower germination after aging were found after the 18th month. In this experiment, effects of storage time and environment were significantly detected at least by one of the tests, which disagree with Soares et al (2010), who concluded that the accelerated aging test is efficient to classify seed lots in vigor levels whereas conductivity evaluations are not efficient but only identify low-vigor lots.…”

Section: The Equation Adjusted To Mean Germinationcontrasting

confidence: 99%

Extended Storage of Sudangrass Seeds

Toledo¹,

Cavariani²,

Nakagawa³

et al. 2013

Revista Brasileira de Milho e Sorgo

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RESUMO -O sorgo-sudão se destaca por sua tolerância à seca e estresse salino. No entanto, estudos sobre produção de sementes e técnicas de pós-colheita são insuficientes considerando-se a demanda e o potencial desta cultura. Este estudo objetivou monitorar a qualidade fisiológica de sementes de sorgo-sudão armazenadas em diferentes condições ambientais por um período de 18 meses. As sementes de sorgo-sudão foram armazenadas sob quatro condições (ambiente natural, câmara seca, geladeira frost free e freezer). A qualidade fisiológica foi avaliada por testes de germinação e vigor antes e durante o armazenamento, semestralmente, até 18 meses. Os dados foram submetidos à análise de variância e analisados em esquema fatorial 4 x 4, com médias de ambientes comparadas pelo teste de Tukey (p≤0,05) e períodos de armazenamento por análise de regressão. A velocidade a porcentagem de emergência de plântulas de sorgo-sudão são reduzidas a partir de 15 meses de armazenamento das sementes enquanto que a germinação, o desenvolvimento das plântulas e o peso são preservados até 18 meses. O armazenamento das sementes em ambiente natural ocasiona decréscimo no vigor mais rapidamente do que em câmara seca, geladeira e freezer, apesar do maior crescimento das plântulas nesta condição comparativamente às demais.Palavras-chave: Sorghum sudanense; germinação; conservação; qualidade fisiológica. ARMAZENAMENTO PROLONGADO DE SEMENTES DE SORGO-SUDÃOABSTRACT -Sudangrass stands out for being tolerant to drought and saline stress. However, studies on production of seeds and post-harvest technologies are insufficient considering both the demand and potential of this crop. This study aimed to monitor physiological quality of sudangrass seeds stored under different environmental conditions for a period of 18 months. Sudangrass seeds were stored under four conditions (natural environment, dry chamber, frost free, freezer). Physiological quality was assessed before storage and then every semester until 18 months by germination and vigor tests. Variance tests were applied for statistical analysis and means were compared as a 4 x 4 factorial.

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Section: The Equation Adjusted To Mean Germinationcontrasting

confidence: 99%

Extended Storage of Sudangrass Seeds

Toledo¹,

Cavariani²,

Nakagawa³

et al. 2013

Revista Brasileira de Milho e Sorgo

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“…Similar results were reported for sorghum (SOARES et al, 2010), rice (TUNES et al, 2012), and wheat (MERTZ et al, 2012) seeds -seedling emergence in protected environment was an efficient test to select lots of high physiological potential and field performance.…”

Section: Resultssupporting

confidence: 77%

“…The results were quickly obtained since the tests demanded between 16 and 20 hours for black oat seeds (NOGUEIRA et al, 2013) and 48 hours for triticale (STEINER et al, 2011). The cold test without soil and that of the accelerated aging test at 41 °C for 96 hours were efficient in classifying sorghum lots as to vigor and respective seedling emergence in the field performance (SOARES et al, 2010). …”

Section: Introductionmentioning

confidence: 99%

Evaluation the physiological quality of Brachiaria brizantha cv. BRS ‘Piatã’ seeds

Silva¹,

Martins²,

Cruz³

et al. 2017

Biosci. J.

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ABSTRACT:In a quality control program, seed vigor evaluation is of fundamental importance for the success of the program. The objective of this project was to evaluate the efficiency of several vigor tests to evaluate the physiological quality of Brachiaria brizantha cv. 'BRS Piatã' seed lots and to preview seedling emergence in the field. Ten grass seed lots of the B. brizantha cv. 'BRS Piatã' were evaluated by the following tests: germination, first count of germination, accelerated aging (43 °C/48 hours), cold test (seeds rolled in paper towel), seed water content before and after accelerated aging, electrical conductivity (50 and 75 mL, 25 °C and readings made 2, 4, 6, 8, and 24 hours after beginning the test), speed of germination index, and seedling emergence in sand substratum in the laboratory (26 ± 3 °C) and daily seedling counts between the 7th and the 21th day after sowing. The treatment replications were distributed in the laboratory according to a completely random design with four replications. Seedling emergence in the field data were analyzed according to a randomized complete block design. Treatment means were compared by the Scott Knott test, at the 5% level of probability. The tests for germination and first germination count, seedling emergence and first emergence count in the sand, and accelerated aging are useful to assess the vigor of seed batches of the piatã grass, and provide similar evidence to the seedling emergence in the field.

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“…Vigor tests should detect differences in the physiological potential of seed lots with similar germination and compatible with the minimum market requirements SOARES et al, 2010). These tests are classified as direct and indirect methods; direct methods try to simulate the conditions that occur in the field, and the indirect methods aim to assess physical, biological and physiological seed attributes indirectly related to vigor (SENA et al, 2015).…”

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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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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Testes para avaliação do vigor de sementes de sorgo com ênfase à condutividade elétrica

Cited by 24 publications

References 10 publications

Extended Storage of Sudangrass Seeds

Extended Storage of Sudangrass Seeds

Evaluation the physiological quality of Brachiaria brizantha cv. BRS ‘Piatã’ seeds

Vigor tests in assessing the quality of signal grass seeds

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