Teste de envelhecimento acelerado para avaliação do potencial fisiológico de sementes de urucum

Torres, Salvador Barros; Neto, Francisco Bezerra

doi:10.1590/s0102-05362009000100011

Cited by 6 publications

(2 citation statements)

References 14 publications

(2 reference statements)

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“…This fact could be attributed to the relatively short period of time which was not enough for membrane organization and release of leachate. In a study with sesame seeds, Torres and Bezerra Neto (2009) found that for the various combinations, water volume/temperature/ imbibition period, generally indicated an increase in the amount of leached electrolytes in the range of 1 to 24 hours, as the imbibition period increased.…”

Section: Resultsmentioning

confidence: 99%

Electrical Conductivity Test to Evaluate the Physiological Quality of Salvia hispanica L. Seeds

Radke¹,

Maass²,

Pieper³

et al. 2018

JAS

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Chia (Salvia hispanica L.) is an herbaceous plant that belongs to the Lamiaceae family. Seed vigor testing is an important component of quality control programs, and electrical conductivity test is a possible option in this process. The objective of this study was to identify a methodology of electrical conductivity test to stratify chia seed lots at vigor level according to the emergence of seedlings. Six lots of chia seeds were used in this study. The seeds were exposed to the following determinations: first germination count, germination, emergence speed index, emergence, aerial and root length, aerial and root dry matter, and electrical conductivity at 25, 50 and 75 mL during 1, 2, 4, 6, 8 and 24 hours of soaking in water. The electrical conductivity test in the combination of 25 seeds using 50 mL of water in 6-hour of soaking period, as well as the combination of 50 seeds using 50 mL of water for 24 hours of soaking, were efficient in the stratification of chia seeds in different levels of vigor.

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Section: Resultsmentioning

confidence: 99%

Electrical Conductivity Test to Evaluate the Physiological Quality of Salvia hispanica L. Seeds

Radke¹,

Maass²,

Pieper³

et al. 2018

JAS

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“…Of these, the accelerated aging test is an indirect method of evaluation, which simulates the stress conditions, generates a high respiration rate, and consumes reserves, thereby accelerating the metabolic processes that lead to the deterioration of the seeds by promoting greater absorption of water due to the exposure of the seeds to a humid atmosphere. Thus, the use of a saturated solution of sodium chloride (NaCl) accelerates aging and retards the absorption of water by the seeds during their aging due to the difference in osmotic pressure between the solution and the seed, which may exert a negative effect on germination (Torres et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

The physiological quality of the seeds of passion fruit (Passiflora spp.) grown at different altitudes

Maciel¹,

Lima²,

Madalon³

et al. 2018

Aust J Crop Sci

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Altitudes, ranging between 100 m and 900 m are the most suitable for growing passion fruit and the studies on the distinct geographical locations suggest the expression of different genotypes under the influence of adequate environmental conditions. The objective of this study was to evaluate the physiological quality of the seeds of Passiflora spp., cultivated at three different altitudes in the state of Espírito Santo, Brazil. Before conducting the physiological tests for seed quality, pre-tests were performed on the physically scarified, gibberellic acid-treated, and intact seeds of the yellow passion fruit (Passiflora edulis Sims f. flavicarpa Degener), the purple passion fruit (Passiflora edulis Sims), and the sweet passion fruit (Passiflora alata Curtis), collected from three different altitudes (high, medium, and low), in order to overcome dormancy. The higher values of germination and vigor were observed after the pre-germination treatments of the intact seeds of the yellow passion fruit, the scarified seeds of the purple passion fruit, and the gibberellic acid-treated seeds of the sweet passion fruit. The seeds with the highest values of germination and vigor were selected for the accelerated aging test with a saturated salt solution at 43 ºC for 72 h and the controlled deterioration test with 25% of moisture at 45 ºC for 24 h, respectively. Using these tests, it was possible to differentiate the species of passion fruit, collected from different altitudes. The seeds of the yellow passion fruit and the seeds, collected from higher altitudes presented higher physiological quality in this study.

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Alternativas metodológicas do teste de envelhecimento acelerado em sementes de coentro

et al. 2015

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RESUMO No presente trabalho, o objetivo foi adequar a metodologia do teste de envelhecimento acelerado para avaliação INTRODUÇÃOO coentro (Coriandrum sativum L.) é uma hortaliça folhosa muito utilizada na culinária brasileira, em especial na região Nordeste do Brasil, sendo uma cultura de grande rotatividade comercial. A qualidade das sementes utilizadas pelos agricultores está relacionada de forma direta ao seu potencial fisiológico, representado pela germinação e vigor, expressando sua capacidade de originar plântulas normais (PEREIRA et al., 2011).Para determinar o potencial germinativo de um lote de sementes, utiliza-se o teste de germinação, porém, esse teste, isoladamente, não determina a efetiva qualidade da semente, dessa forma, os testes de vigor fornecem informações complementares, que permitem detectar diferenças fisiológicas para lotes de mesma porcentagem de germinação. Dentre os testes utilizados e também considerados como um dos mais sensíveis para a avaliação do vigor de sementes destaca-se o teste de envelhecimento acelerado (MARCOS FILHO, 1999), uma vez que seus resultados se relacionam com o potencial de conservação das sementes.Um aspecto de grande relevância a ser considerado no teste de envelhecimento acelerado é o tamanho da semente, pois, segundo RAMOS et al. (2004), para espécies de sementes relativamente pequenas, como as de hortaliças, tem-se obtido resultados menos consistentes, devido à variação muito acentuada no grau de umidade ao final do I

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Teste de envelhecimento acelerado para avaliação do potencial fisiológico de sementes de urucum

Cited by 6 publications

References 14 publications

Electrical Conductivity Test to Evaluate the Physiological Quality of Salvia hispanica L. Seeds

Electrical Conductivity Test to Evaluate the Physiological Quality of Salvia hispanica L. Seeds

The physiological quality of the seeds of passion fruit (Passiflora spp.) grown at different altitudes

Alternativas metodológicas do teste de envelhecimento acelerado em sementes de coentro

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