Métodos e temperaturas de hidratação na qualidade fisiológica de sementes de milho

Zucareli, Claudemir; Cavariani, Cláudio; Oliveira, Eliege Aparecida de Paiva; Nakagawa, João

doi:10.1590/s1806-66902011000300015

Cited by 10 publications

(9 citation statements)

References 12 publications

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“…In a study of four hydration methods (wet substrate, humid atmosphere, immersion in water and addition of the amount of water required) to raise the moisture content of corn seeds, Zucareli et al (2011) found that the humid atmosphere method reduced the physiological potential of the seeds, corroborating the results obtained for the different characteristics assessed in the present study. On the other hand, the authors found that a temperature of 30 °C and the method of direct immersion in water did not alter the physiological quality of ordinary corn seeds, being suitable for the hydration of these seeds, diverging from the results of this study.…”

Section: Resultssupporting

confidence: 88%

“…In their study on the physiological potential of ordinary corn seeds after being submitted to hydration through the methods of humid atmosphere, wet substrate, immersion in water and addition of the required amount of water under two temperatures, 20 and 30° C, Zucareli et al (2011) found that the humid atmosphere method reduced the physiological quality of corn seeds and the method of direct immersion in water at 30º C did not impact the physiological quality of the seeds, being the most suitable for this purpose.…”

Section: Introductionmentioning

confidence: 99%

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Hydration methods and physiological potential of sweet corn seeds

Marinho¹,

Fonseca²,

Zucareli³

2020

Biosci. J.

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The evaluation of the physiological potential of sweet corn seeds is fundamental in the production process, because the germination and vigor reflect the potential for storage, commercialization and use of these seeds. The choice of vigor tests with an adequate and efficient analysis methodology is fundamental to obtaining reliable results. In this sense, the objective of this study was to assess the physiological potential of sweet corn seeds after hydration using different moistening methods to increase water content to 20%. First, the lot of seeds was characterized as to its moisture content and initial physiological potential. Subsequently, two experiments were conducted, both under a completely randomized design. In the first experiment, different volumes of water on the filter paper sheets were assessed for seed hydration a method that uses a wet substrate. In the second, four hydration methods were evaluated: wet substrate (WS), humid atmosphere (HU), immersion in water (IW) and addition of the required amount of water (WR). A constant temperature of 25ºC was used in both experiments and then the moisture content and physiological potential of seeds were determined. The humid atmosphere method reduces the physiological quality of sweet corn seeds because it favors the deterioration and hence is unsuitable for the hydration of seeds of this species. The wet substrate method, in an amount equivalent to 2.5 times the paper mass, increased the water content of sweet corn seeds to 20%, achieving the desired degree of moisture without altering their physiological potential.

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Section: Resultssupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Hydration methods and physiological potential of sweet corn seeds

Marinho¹,

Fonseca²,

Zucareli³

2020

Biosci. J.

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“…Tabela 5 -Coeficiente de correlação de Spearman ( ) entre os dados médios obtidos nos testes de emergência de plântulas em campo e de germinação a baixa temperatura, dos lotes de sementes de milho, híbridos 30F35R e 30P70H *Significativo a 5% de probabilidade pelo teste T Temperaturas abaixo da ótima recomendada para germinação tornam o processo de embebição mais lento (ZUCARELI et al, 2011), podendo dificultar a reorganização das membranas celulares (CARVALHO et al, 2009), sendo este fato influenciado pela qualidade fisiológica (vigor) e genética (cultivar) da semente.…”

Section: Teste De Frio ----------------------------------------------unclassified

Stress testing in the evaluation of vigour in maize seed

Grzybowski

Vieira

Panobianco

2015

Revista Ciência Agronômica

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RESUMO -Na semeadura da cultura do milho, fatores adversos como o alagamento do solo e temperaturas abaixo da recomendada podem prejudicar o estabelecimento do estande. Assim, há a necessidade de se buscar alternativas para a determinação do vigor da semente em condições adversas, visando auxiliar o sistema de produção. No trabalho objetivouse estimar a qualidade fisiológica de sementes de milho em condições de estresses hídrico e térmico, estudando a metodologia dos testes de submersão em água e germinação a baixa temperatura. Para condução dos experimentos foram utilizados dez lotes de dois híbridos simples (30F35R e 30P70H), sendo cinco de cada. A avaliação da qualidade inicial dos lotes foi determinada pelo teor de água e testes de germinação, frio e emergência de plântulas e, as metodologias estudadas para a avaliação do vigor foram: a) submersão das sementes em água, combinando diferentes períodos (24; 36; 48 e 72 horas) e temperaturas (20; 25 e 30 °C); b) germinação a baixa temperatura, testando-se 15 °C por oito dias e 16; 17 e 18 °C por sete dias. O teste de submersão em água é promissor para avaliação do vigor de sementes de milho em condições de estresse, mediante imersão das sementes em água por 48 horas, a 25 °C. Palavras-chave:Zea mays L.. Germinação. Submersão em água. Baixa temperatura.ABSTRACT -When sowing maize, such adverse factors as flooding and temperatures below those recommended can hinder establishment of the stand. There is therefore a need to find alternatives for the determination of seed vigour under adverse conditions, with a view to helping the system of production. This work aimed to estimate the physiological quality of maize seed under conditions of hydric and thermal stress, studying the methodology of testing by submersion in water and germination at low temperatures. To carry out the experiments, ten lots of two single hybrids (30F35R and 30P70H) were used, giving five lots of each. Evaluation of the initial quality of the lots was determined by water content, the cold test and the tests of germination and seedling emergence; the methodologies studied to evaluate vigour were: a) submersing the seeds in water, combining different periods (24, 36 , 48 and 72 hours) and temperatures (20, 25 and 30 °C); and b) germination at low temperature, testing at 15 °C for eight days and at 16, 17 and 18 °C for seven days. The test for submersion in water is promising for the evaluation of the vigour of maize seeds under conditions of stress through immersion of the seeds in water for 48 hours at 25 °C.

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“…In general, higher electrical conductivity values occurred at the highest temperature (25 0 C), except for mother trees 6 and 12, in the lowest imbibition volume (75 mL) while leaching differences increased with the increasing imbibition period (Figure 1). Furthermore, the temperature is one of the factors affecting the leaching pattern of exudates, so that the quantity and speed of leachate loss are greater at higher temperatures (ZUCARELI et al, 2011). However, these authors reported that the observed changes do not grant a changing classification of seed lots.…”

Section: Resultsmentioning

confidence: 97%

Quality of Handroanthus serratifolius (Vahl) S. O. Grose seeds evaluated by the electrical conductivity test

Silva

Paula

Valdovinos

et al. 2021

Revista Ciência Agronômica

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The electrical conductivity test (EC) used to evaluate seed vigor is directly related to the integrity of cell membranes, but its use in forest species is still restricted. Thus, the objective of this study is to analyze the efficiency of the EC test to evaluate physiological parameters regarding seed quality and the genetic variability among Handroanthus serratifolius mother trees. Seeds from 15 mother trees were evaluated for germination (G%) and germination speed index (GSI). In the EC test, the seeds were imbibed in two water volumes (75 and 100 mL) at 20 and 25 °C, and the electrical conductivity was measured after five imbibition periods (24, 48, 72, 96, and 120 h). The germination test data were submitted to a randomized block design (RBD) analysis of variance and means were compared by the Scott-Knott test. The EC test was conducted as an RBD in a split-split plot scheme, with interaction unfolding by polynomial regression analysis. The mother trees were divided into four groups regarding G% and SGI. The EC test separated the mother trees into a larger number of groups, regardless of temperature, volume, and imbibition period. In conclusion, the EC test consisting of imbibition 25 seeds in 75 mL of deionized water at 20 °C for 48 h is suitable for evaluating the physiological quality of seeds and the variability among mother trees of Handroanthus serratifolius (Vahl) S. O. Grose.

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Métodos e temperaturas de hidratação na qualidade fisiológica de sementes de milho

Cited by 10 publications

References 12 publications

Hydration methods and physiological potential of sweet corn seeds

Hydration methods and physiological potential of sweet corn seeds

Stress testing in the evaluation of vigour in maize seed

Quality of Handroanthus serratifolius (Vahl) S. O. Grose seeds evaluated by the electrical conductivity test

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