Sowing seasons and quality of soybean seeds

Ávila, Marizangela Rizzatti; Braccini, Alessandro de Lucca e; Motta, Ivo de Sá; Scapim, Carlos Alberto; Braccini, Maria do Carmo Lana

doi:10.1590/s0103-90162003000200007

Cited by 17 publications

(13 citation statements)

References 5 publications

(8 reference statements)

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“…We also found a significant interaction between cultivars and locations, i.e., the cultivars showed no consistent performance irrespective of environment. These results confirm the reports presented by [15]- [17] for physiological quality in different environments. Significant interactions between cultivars and locations have been frequently reported in the literature for physiological seed quality [6] [16] [18].…”

Section: Resultssupporting

confidence: 93%

Potassium Fertilization and Physiological Soybean Seed Quality

Zambiazzi¹,

Bruzi²,

Carvalho³

et al. 2014

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The purpose of this study was to evaluate the influence of increased application rates of potassium on the physiological quality of seeds from different soybean cultivars. Seeds from two locations (São Gotardo, MG and Lavras, MG, Brazil) were used. After harvest, the seeds were sent to the Central Seed Analysis Laboratory of the Federal University of Lavras. We used a randomized design in a 4 × 6 factorial arrangement of four cultivars and six doses of potassium. All tests were performed with two replicates of 50 seeds (300 seeds per treatment). Germination, emergence under controlled conditions, accelerated aging, electrical conductivity, and tetrazolium tests were performed. Data were subjected to analysis of variance. In soybean seed production fields with high potassium content in the soil, higher application rates of potassium do not increase the physiological quality of seeds.

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Section: Resultssupporting

confidence: 93%

Potassium Fertilization and Physiological Soybean Seed Quality

Zambiazzi¹,

Bruzi²,

Carvalho³

et al. 2014

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“…The highest percentage of seedlings with primary leaf growth between 50% and 75% of coleoptile length was observed in hybrid 4,followed by hybrids 2 and 3, which had a higher percentage of this seedling type than hybrid 1 (Table 9) under light less conditions with water quantity 2.0 to 3.0 times paper weight. This was also observed by Ávila, Braccini, and Scapim (2007), who reported a reduction in the length of maize plants when water availability was reduced. However, according to Yap (1981), an excess of water is also detrimental to the development of maize seedlings.…”

Section: Hybridsupporting

confidence: 77%

<b>Primary leaf growth and coleoptile length in maize seedlings

et al. 2018

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ABSTRACT. Evaluation of the physiological potential of maize seeds during the certification process is performed by a germination test. However, some tests show a delay in the growth of aerial seedling organs that does not reflect seed lot behavior in the field. This study aims to investigate the effects of genotype, water, light and temperature on differential primary leaf growth compared to coleoptile length in maize seedlings. Seeds from two simple hybrids and their reciprocal crosses that showed slow primary leaf growth were evaluated according to physiological quality, morphology, histochemistry, and enzymatic expression. There were differences among maize genotypes regarding initial primary leaf growth when compared to the coleoptile, especially when germination was tested without light. Water availability and optimal temperature range did not affect the differential growth of the primary leaf in the hybrids. Pericarp thickness, lignin content and differences in enzyme expression in different genotypes were also not related to changes in the relationship of primary leaf growth with coleoptile length during the maize seed germination test.Keywords: Zea mays L.; germination test; lignin; enzymes.Crescimento diferencial da plúmula e do comprimento do coleóptilo de plântulas de milho RESUMO. A avaliação do potencial fisiológico de lotes de sementes de milho no processo de certificação é realizada pelo teste de germinação. No entanto, em alguns testes, são observados atrasos no crescimento das estruturas da parte aérea das plântulas, o que leva a considerá-las plântulas anormais, mas não reflete o comportamento do lote no campo. Objetivou-se, neste trabalho, investigar o efeito do genótipo, água, luz e temperatura sobre o crescimento diferencial da plúmula em relação ao comprimento do coleóptilo de plântulas de milho. Sementes de dois híbridos simples e dos seus recíprocos com característica de crescimento lento da plúmula, foram avaliadas em sua qualidade fisiológica, morfológica, histoquímica e expressão enzimática. Existem diferenças entre genótipos de milho no que se refere ao crescimento inicial da plúmula em relação ao coleóptilo, principalmente na ausência de luz no teste de germinação. Disponibilidade hídrica e temperatura não afetam a resposta dos híbridos em relação ao crescimento diferencial da plúmula. Espessura do pericarpo, presença de lignina ou diferenças na expressão das enzimas dos genótipos não estão relacionadas às variações de comprimento plúmula/coleóptilo, durante o teste de germinação.Palavras-chave: Zea mays L.; teste de germinação; lignina; enzimas.

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“…Entretanto, é importante ressaltar que a época de semeadura é fundamental para a produção de sementes de potencial fisiológico elevado, como observaram ÁVILA et al (2003), em estudo com várias épocas de semeadura da soja.…”

Section: Resultados E Discussão Cultivar Fts Campo Mourão Rr (Ciclo Punclassified

Antecipação da colheita na qualidade fisiológica de sementes de soja

Terasawa¹,

Panobianco

Possamai

et al. 2009

Bragantia

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RESUMOO retardamento da colheita a partir da maturidade fisiológica pode influenciar negativamente a qualidade da semente devido a sua exposição a condições menos favoráveis do ambiente. Normalmente, o produtor aguarda a redução de umidade das sementes e inicia a colheita tão logo seja possível efetuá-la. A pesquisa teve por objetivo avaliar a influência da colheita da soja, com diferentes teores de água, sobre a qualidade fisiológica das sementes produzidas, procurando-se determinar o melhor momento de colheita antecipada para a cultura. Para tanto foram realizados experimentos na safra 2006/2007 com duas cultivares: FTS Campo Mourão RR e FTS Cascavel RR, de ciclo precoce e semiprecoce, respectivamente, sendo as sementes de cada cultivar colhidas no estádio R8, com diferentes teores de água, iniciando-se a operação com 28,5% de água e finalizando com 14,0%. A avaliação da qualidade foi efetuada em duas épocas: abril, para analisar a qualidade inicial das amostras e, em outubro, para avaliar a influência do armazenamento. Em cada época de avaliação foram determinados o teor de água das sementes, a germinação e a viabilidade e vigor pelo tetrazólio. Pelos resultados pode-se concluir que é possível a colheita antecipada de sementes de soja, de alta qualidade fisiológica, com teores abaixo de 22,9% de água. Palavras-chave:Glycine max, teor de água, germinação, vigor. ABSTRACT HARVEST ANTICIPATION ON THE PHYSIOLOGICAL QUALITY OF SOYBEAN SEEDSThe harvest delay starting from the physiological maturity has negative influence in soybean seed quality, due to the exposure to unfavorable environmental conditions. Usually, farmers wait for the decrease in seed moisture levels to begin the harvest process as soon as possible. This research had the objective to analyze the influence of harvest anticipation of soybean seeds at different moisture contents on the physiological quality of seeds produced, in search of better seed moisture contents for earliest harvest considering seed vigor and germination. Then trials were carried out with two soybean cultivars, during 2006/2007 crop year and seeds of each cultivar were harvested at R8 stage, at different seed moisture levels, beginning the operation at 28.5% of water and ending at 14.0%. Quality evaluation was made twice: in April, in order to analyze the initial quality of the samples and, in October, to analyze the influence of storage. In each evaluation period, seed moisture content, germination and tetrazolium viability and vigor were assayed. According to the results obtained, the following conclusion can be drawn: soybean seed harvest time can start at seed moisture content below 22.9%.

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Sowing seasons and quality of soybean seeds

Cited by 17 publications

References 5 publications

Potassium Fertilization and Physiological Soybean Seed Quality

Potassium Fertilization and Physiological Soybean Seed Quality

<b>Primary leaf growth and coleoptile length in maize seedlings

Antecipação da colheita na qualidade fisiológica de sementes de soja

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