-Seed deterioration causes losses to seed companies during the storage. For researches, the challenge has been to develop techniques which improve the seed longevity as well as laboratory analysis methods required for evaluating the evolution of deterioration in storage. This study had the objective of determining the effectiveness of the accelerated aging test with a saturated NaCl solution and Seed Vigor Imaging System (SVIS) analysis in checking soybean seed physiological in comparison with the recommended vigor tests. Soybean seeds from the cultivars BRS 184 and M-Soy 7908 RR were used, each of them were represented by six lots and stored for six months under two environment conditions. Seed physiological quality was checked every two months in storage through germination evaluations, accelerated aging (different methods), tetrazolium test (vigor and viability) seedling emergence, and SVIS analysis. The tetrazolium test is the most advisable method for evaluating soybean seed quality during storage. The results of the saturated salt accelerated aging test with NaCl at 41 °C for 72 or 96 hours and the SVIS evaluation are also both efficient for estimating the physiological potential of seeds.Index terms: physiological potential, storage, Glycine max, SVIS.Envelhecimento acelerado e análise computadorizada de imagem de plântulas para avaliação do desempenho de sementes de soja RESUMO -Deterioração em sementes provoca prejuízos para empresas sementeiras durante o armazenamento. Para os pesquisadores, o desafio tem sido buscar técnicas que visam aumentar a longevidade das sementes bem como métodos de análise laboratoriais exigidos para avaliar a evolução da deterioração no armazenamento. Este estudo teve o objetivo de avaliar a eficácia do teste de envelhecimento acelerado com solução saturada de NaCl e do uso do software Seed Vigor Imaging System (SVIS) para comparação do potencial fisiológico das sementes durante o armazenamento, em comparação com os testes de vigor existentes. Foram utilizadas sementes de soja das cultivares BRS 184 e M-Soy 7908 RR, representadas por seis lotes e armazenadas por seis meses, sob duas condições ambientais. Verificou-se o potencial fisiológico por meio de avaliações de germinação, envelhecimento acelerado (diferentes métodos), tetrazólio (vigor e viabilidade), emergência de plântulas e análise SVIS. O teste de tetrazólio é o mais sensível para avaliar o potencial fisiológico de sementes de soja durante o armazenamento. Além disso, os testes de envelhecimento acelerado em solução saturada de NaCl a 41 °C durante 72 horas ou 96 horas e análise a partir do software SVIS foram eficazes para estimar o potencial fisiológico de sementes de soja.Termos para indexação: potencial fisiológico, armazenamento, Glycine max, SVIS.
The objective was to adapt the methodology of the accelerated aging test to evaluate the physiological potential of seeds of four lots of lettuce genotypes 'Babá de verão', 'Tainá' and 'Vera' applying the traditional method and using
One of the main problems in pepper seed production is the uneven maturation of the fruits due to the continuous flowering period of the plant, making it difficult to harvest all the fruits at the same time. Thus, studies on fruit maturation stage and seed physiological potential are extremely important in order to identify the appropriate harvest time, avoiding seed deterioration. The aim of this study was to evaluate the physiological potential of five genotypes of “dedo de moça” pepper seeds (Capsicum baccatum var. pendulum) in three maturation stages (green, orange and red), with and without 10-day rest period after harvest date. Physiological potential and vigor of seeds were evaluated through germination tests (first count, accelerated aging and electrical conductivity). The observed results were submitted to variance analysis, comparing averages through Tukey test and principal components analysis. In general, red fruits reflected seed maturity since they provided maximum germination. On the other hand, even fruits harvested at a maturation stage prior to red (green and orange), showed the benefits of the rest periods on germination and vigor characteristics, being this result more evident in green fruits which, initially, had lower physiological potential. The evaluated genotypes showed lower physiological potential of fruits harvested at the green stage, without 10-day rest period.
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