Adequação do teste de condutividade elétrica para sementes de Pisum sativum subsp. Arvense

Machado, Carla Gomes; Martins, Cibele Chalita; Santana, Denise Garcia de; Cruz, Simério Carlos Silva; Oliveira, Silvia Sanielle Costa de

doi:10.1590/s0103-84782011005000062

Cited by 16 publications

(21 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…http://dx.doi.org/10.1590/2317-1545v37n4152357 Among the vigor tests, the electrical conductivity test is considered one of the most indicated by International Seed Testing Association (ISTA, 1995) and by the Association of Official Seed Analysts (AOSA, 2009) because of its objectivity and speed, plus the ease of execution. The principle of the test establishes that less vigorous (or more deteriorated) seeds have a lower speed for restoring integrity of cell membranes during soaking and therefore release greater amounts of solutes (sugars, amino acids, fatty acids, proteins, enzymes and inorganic ions) to the external environment (Machado et al, 2011;Marcos-Filho, 2015).…”

Section: Introductionmentioning

confidence: 99%

Electrical conductivity test in Piptadenia moniliformis Benth. seeds

et al. 2015

View full text Add to dashboard Cite

-The electrical conductivity test is a quick, practical and objective test force; however, its effectiveness varies according to the species, quantity of seed, water volumes, soaking temperature, among other factors. The objective of this study was to evaluate the physiological quality of P. moniliformis seeds lots by means of the electrical conductivity test, testing different methodologies. For this, two lots were tested in three quantities of time (25, 50 and 75 seeds) and nine soaking times (2, 4, 6 , 12, 24 , 36, 48, 60 and 72 hours) in three volumes of water (50, 75 and 100 mL) at 25 °C. To evaluate the initial quality of the lots, germination percentage, germination speed index, average time of germination, length and dry mass of seedlings were determined. The use of the electrical conductivity test of P. moniliformis seeds is recommended using 75 seeds in 75 mL of water for 2 hours at 25 °C or seeds in 50 mL distilled water with 50 seeds per 6 hours at 25 °C.Index terms: catanduva, forest seeds, caatinga biome, vigor.Teste de condutividade elétrica em sementes de Piptadenia moniliformis Benth.RESUMO -O teste de condutividade elétrica é considerado rápido, prático e objetivo na diferenciação de lotes de sementes, no entanto, alguns fatores podem influenciar nos resultados. O objetivo deste trabalho foi avaliar a qualidade fisiológica de lotes de sementes de P. moniliformis por meio do teste de condutividade elétrica. Para isto, foram testados dois lotes em três quantidades de sementes (25, 50 e 75 sementes) e nove tempos de embebição (2, 4, 6, 12, 24, 36, 48, 60 e 72 horas) em três volumes de água (50, 75 e 100 mL) a 25 °C. Para avaliação da qualidade inicial dos lotes determinou-se a porcentagem de germinação, índice de velocidade de germinação, tempo médio de germinação, comprimento e massa seca de plântulas. Adotou-se o delineamento inteiramente casualizado, em esquema fatorial 2x3x9 (2 lotes, 3 quantidade de sementes, 9 períodos de embebição) avaliados para cada volume separadamente, realizando-se a comparação entre médias pelo teste Tukey a 5% de probabilidade. De acordo com os resultados, recomenda-se o uso do teste de condutividade elétrica em sementes de P. moniliformis utilizando 50 mL de água destilada com 50 sementes por 6 horas ou com 75 sementes em 75 mL de água durante 2 horas, a 25 °C.Termos para indexação: catanduva, sementes florestais, bioma caatinga, vigor.

show abstract

Section: Introductionmentioning

confidence: 99%

Electrical conductivity test in Piptadenia moniliformis Benth. seeds

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Other authors also observed that the decrease in water volume is associated with higher electrical conductivity values; for example, this was reported by Fessel et al (2005) in B. oleracea, Ribeiro et al (2009) in Z. mays, Soares et al (2010 in Sorghum bicolor [L.] Moench, Machado et al (2011) in Pisum sativum L. subsp. arvense, Ataíde et al (2012) in P. nitens, andMilani et al (2012) …”

mentioning

confidence: 68%

“…Similar results were obtained when electrical conductivity was tested using 50 pitaya seeds ( Figure 5). This result was probably due to the increase in the imbibition temperature, which is related to alterations in the viscosity of the solution and an increase in the activation energy (mobility) of the ions, and consequently to an increase in the quantity and speed of electrolyte leaching (MACHADO et al, 2011). Regarding the volume of water, it was observed that in the experiment with 50 seeds, water volumes of 50 and 40 mL promoted the expression of lower electrical conductivity values as a consequence of lower concentration of the solution.…”

Section: In B Napusmentioning

confidence: 99%

Tests for evaluating the physiological quality of pitaya seeds

Ortiz¹,

Moritz²,

Takahashi³

et al. 2015

Sem. Ci. Agr.

View full text Add to dashboard Cite

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

show abstract

“…Some tests were identified as the most efficient to rank seed lots of the most important crops such as the cold test for corn, barley, rice and sorghum (MARCOS FILHO, 2015), the electrical conductivity test for soybean and pea (ISTA, 2006;MACHADO et al, 2011), and the accelerated aging test for corn, oats and wheat (MARCOS FILHO, 2015).…”

Section: Introductionmentioning

confidence: 99%

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

Silva¹,

Martins²,

Cruz³

et al. 2017

Biosci. J.

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Adequação do teste de condutividade elétrica para sementes de Pisum sativum subsp. Arvense

Abstract: 20°C and 25°C), water volumes (75mL and 250mL) and imbibition periods (8, 16, 20, 24 and 28

Cited by 16 publications

References 4 publications

Electrical conductivity test in Piptadenia moniliformis Benth. seeds

Electrical conductivity test in Piptadenia moniliformis Benth. seeds

Tests for evaluating the physiological quality of pitaya seeds

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

Contact Info

Product

Resources

About