Efeito do vigor de sementes de soja sobre o seu desempenho em campo

Vanzolini, Silvelena; Carvalho, N. M.

doi:10.1590/s0101-31222002000100006

Cited by 29 publications

(14 citation statements)

References 2 publications

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“…Within this context, Costa et al (2012) had already demonstrated that the germination test, when performed at 25 °C, and under an osmotic potential of -0.1 MPa simulated with PEG 6000 may be used as a tool to assess vigor of soybean seeds; as it presents a result similar to that obtained through the accelerated aging test. Vanzolini and Carvalho (2002) found that more vigorous seeds produce seedlings with higher length roots; a result that is similar to what was observed in this study. However, herein it was found that under ideal conditions the smaller seeds, identified in the first count of germination test as having lower vigor, produced seedlings with radicles of shorter length (Table 2).…”

Section: Resultssupporting

confidence: 91%

Influence of seed size and water restriction on germination of soybean seeds and on early development of seedlings

Pereira

Dias

2013

J. Seed Sci.

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-Germination is a biological process that depends on adequate water supply to embryo development. Water deficit slows this process and depending on intensity and extent of this deficit may cause seed death. Nevertheless, it has not yet been reported whether seed size influences physiological potential, or tolerance to water stress. This study aimed at assessing the effects of seed size, as well as of water stress on germination of the seeds and on early soybean seedling development. The experiment was composed by seeds of 10 soybean cultivars classified by metallic screens with three sizes of oval holes (S12, S13 and S14) and subjected to three water potentials (0, -0.1, and -0.2 MPa), with four replications. Data on genotypes were grouped as replications and arranged on a factorial 3 x 3 (size x water potential), with 40 replications. Data assessed were: first and final count of germination; length and seedling dry weight; and correlation between length/mass of radicle and hypocotyl. It was concluded that under ideal moisture conditions larger seeds have better physiological quality, producing more vigorous seedlings; but, that under water potential of -0.2 MPa smaller seeds produce larger seedlings; and that the hypocotyl is more influenced by water stress than the radicle.Index terms: Glycine max, seed, water potential, germination.Influência do tamanho de semente e da restrição hídrica na germinação de sementes de soja e no desenvolvimento inicial das plântulas RESUMO -A germinação é um processo biológico dependente do fornecimento adequado de água para o desenvolvimento do embrião. O déficit hídrico retarda este processo e, dependendo da densidade e duração desse déficit, pode causar a morte da semente. Contudo, ainda não foi relatado se o tamanho da semente influencia o seu potencial fisiológico e a sua tolerância ao estresse. O objetivo deste estudo foi investigar os efeitos do tamanho da semente e do estresse hídrico na germinação das sementes e no desenvolvimento inicial das plântulas de soja. Este experimento foi composto por sementes de 10 cultivares de soja, classificadas por peneiras com crivos de três tamanhos (P12, P13 e P14) e submetidas a três potenciais hídricos (0, -0,1 e -0,2 MPa), com quatro repetições. Os dados sobre genótipos foram agrupados como repetições de um fatorial simples 3 x 3 (tamanhos x potenciais hídricos), com 40 repetições. Avaliou-se: primeira contagem e contagem final de germinação, e relação comprimento/massa do hipocótilo e da radícula. Concluiu-se que sob condições ideais de umidade, sementes maiores têm melhor qualidade fisiológica, produzindo plântulas mais vigorosas; mas, sob potencial hídrico de -0,2 MPa sementes menores produzem plântulas maiores; e que o hipocótilo é mais afetado pelo estresse hídrico do que a radícula.Termos para indexação: Glycine max, semente, potencial hídrico, germinação.1

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Section: Resultssupporting

confidence: 91%

Influence of seed size and water restriction on germination of soybean seeds and on early development of seedlings

Pereira

Dias

2013

J. Seed Sci.

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“…Several species of the Asteraceae show similar behavior to that found in this study for E. mollis, with seed maturation close to 45 DAA (Bezerra et al, 2003;Duarte, Santos, Souza Peixoto, & Santos, 2012;Grzybowski et al, 2016;Guimarães, Oliveira, Mantovani-Alvarenga, & Grossi, 1998;Silveira, Villela, & Tillmann, 2002), with some species showing earlier maturation, such as Adenostemma brasilianum (Pers.) Cass.…”

Section: Discussionsupporting

confidence: 81%

Maturation, processing and seed storage of Elephantopus mollis Kunth Maturação, processamento e armazenamento de sementes de Elaphantopus mollis Kunth.

et al. 2019

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Elephantopus mollis Kunth. (Asteraceae) é uma espécie medicinal aromática, nativa da América do Sul e Central com propriedades hepatoprotetora, anti-inflamatória, antitumoral e leishmanicida. Objetivou-se avaliar a maturação, ponto de colheita, beneficiamento e armazenamento de sementes desta espécie visando contribuir com a produção do recurso fitoterápico. Coletou-se capítulos florais entre 7 e 56 dias após a antese, sendo avaliado a massa seca, teor de umidade e germinação das sementes e correlacionados com caracteres morfológicos dos capítulos florais. Avaliou-se o beneficiamento dos capítulos florais por meio de peneiras e soprador de sementes, com averiguação da pureza, peso de mil sementes, germinação e valor cultural das sementes. Determinou-se potencial germinativo de sementes armazenadas por até 18 meses à temperatura ambiente e refrigerado e correlacionado com teste de envelhecimento acelerado. O ponto de colheita ocorre aos 49 dias após a antese e pode ser identificado a campo pela coloração marrom das brácteas interflorais. Pode-se obter sementes com valor cultural acima de 80% com o uso de peneira 0,59 mm e soprador de sementes. As sementes podem ser armazenadas por 12 meses a frio sem queda do potencial germinativo. O teste de envelhecimento acelerado permite estimar a viabilidade do armazenamento das sementes por 18 meses.

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“…On the other hand, the seed traits showed a significant and inverse correlation with NDM (Table 5). Low-vigor seed lots have been shown to prolong the vegetative phase of plants (Vanzolini and Carvalho, 2002), which is intimately related to the reproductive cycle of a genotype.…”

Section: Resultsmentioning

confidence: 99%

Canonical correlations between agronomic traits and seed physiological quality in segregating soybean populations

Pereira¹,

Silva

Val

et al. 2017

Genet. Mol. Res.

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The objective of this study was to evaluate the relationship between agronomic traits and physiological traits of seeds in segregating soybean populations by canonical correlation analysis. Seven populations and two commercial cultivars in three generations were used: F plants and F seeds; F plants and F seeds, and F seeds and plants. The following agronomic traits (group I) were evaluated: number of days to maturity, plant height at maturity, insertion height of first pod, number of pods, grain yield, and oil content. The physiological quality of seeds (group II) was evaluated using germination, accelerated aging, emergence, and emergence rate index tests. The results showed that agronomic traits and physiological traits of seeds are not independent. Intergroup associations were established by the first canonical pair for the generation of F plants and F seeds, especially between more productive plants with a larger pod number and high oil content and seeds with a high germination percentage and emergence rate. For the generation of F plants and F seeds, the first canonical pair indicated an association between reduced maturity cycle, seeds with a high emergence percentage and a high percentage of normal seedlings after accelerated aging. According to the second canonical pair, more productive and taller plants were associated with seed vigor. For the generation of F seeds and plants, the associations established by the first canonical pair occurred between seed vigor and more productive plants with high oil content and reduced maturity cycle, and those established by the second canonical pair between seeds of high physiological quality and tall plants.

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Efeito do vigor de sementes de soja sobre o seu desempenho em campo

Cited by 29 publications

References 2 publications

Influence of seed size and water restriction on germination of soybean seeds and on early development of seedlings

Influence of seed size and water restriction on germination of soybean seeds and on early development of seedlings

Maturation, processing and seed storage of Elephantopus mollis Kunth Maturação, processamento e armazenamento de sementes de Elaphantopus mollis Kunth.

Canonical correlations between agronomic traits and seed physiological quality in segregating soybean populations

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