Envelhecimento acelerado em sementes de trigo

Pedroso, Daniele Cardoso; Tunes, Lilian Madruga de; Barbieri, Ana Paula Piccinin; Barros, Antônio Carlos Souza Albuquerque; Muniz, Marlove Fátima Brião; Menezes, Vanessa Ocom

doi:10.1590/s0103-84782010001100023

Cited by 12 publications

(14 citation statements)

References 6 publications

(3 reference statements)

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“…The effect was greatly exacerbated after 96 and 120 h of exposure, which were shown to be inadequate for seeds belonging to this species. Similar results were obtained by Pedroso et al (2010) and Tunes et al (2012b) in Triticum aestivum L. and Brassica oleracea L. var.…”

supporting

confidence: 91%

“…According to Marcos Filho (1999), the increase in temperature is one of the factors contributing to accelerated seed deterioration, according to the basic principles of the accelerated aging test. Pedroso et al (2010), in their analysis of T. aestivum seed performance in the accelerated aging test at 42 °C over 48, 72, and 96 h, observed a reduction in germination rate after aging, indicating that the procedure using the exposure of 96 h is not the most adequate for this species. This adverse effect is also confirmed in the present study of H. undatus seeds, which is indicated by the decrease in SGI and increase in MGT in seeds exposed for 96 h in an aging chamber.…”

mentioning

confidence: 99%

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Tests for evaluating the physiological quality of pitaya seeds

Ortiz

Moritz

Takahashi

et al. 2015

SCA

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Germination test is used to assess the physiological quality of seeds; however, since it is carried out under ideal conditions, this test has not been shown sufficient for this purpose. Instead, it is possible to use vigor tests, although the lack of standardized methodologies has reduced their applicability and reproducibility. Thus, this study aimed to develop methodologies for conducting tests of germination, accelerated aging, and electrical conductivity for the evaluation of the physiological quality of pitaya seeds. For this purpose, seeds from ripe Hylocereus undatus fruits were used. A completely randomized experimental design was used with four replications. The physiological quality of the seeds was assessed using germination, accelerated aging, and electrical conductivity tests, and the speed of germination index (SGI) and mean germination time (MGT) were determined for both the germination test and accelerated aging test. For the statistical analysis, we performed regression model adjustments and calculated the Pearson correlation coefficient (p < 0.05). The germination test for H. undatus seeds can be performed at 25 °C, with the aim of reaching the highest SGI and lowest MGT values. The accelerated aging test can be conducted at 43 °C for 48 h, because combining these factors favors the expression of seed vigor, allowing seeds to achieve the maximum SGI and minimum MGT, while reducing the time of the assay. The electrical conductivity test can be performed using 25 seeds at a temperature of 30 °C and a water volume of 10 mL, since under these conditions there is less interference from external factors on the leachate content of the solution. Resumo O teste de germinação é utilizado na avaliação da qualidade fisiológica de sementes; porém, devido à sua condução em condições ideais, não tem se mostrado suficiente para este propósito. Nesse sentido, há a possibilidade de recorrer aos testes de vigor, conquanto, a ausência de metodologias padronizadas tem dificultado a sua aplicabilidade e reprodutibilidade. Assim, o trabalho teve como objetivo determinar as metodologias dos testes de germinação, envelhecimento acelerado e condutividade elétrica, a fim de avaliar a qualidade fisiológica de sementes de pitaia. Para o estudo foram utilizadas sementes de frutos maduros de Hylocereus undatus. O delineamento experimental foi o inteiramente casualizado, com quatro repetições. A qualidade fisiológica das sementes foi avaliada pelos testes de germinação, envelhecimento acelerado e condutividade elétrica, além da determinação do índice de velocidade de germinação (IVG) e do tempo médio de germinação (TMG), ambos, em conjunto

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supporting

confidence: 91%

mentioning

confidence: 99%

Tests for evaluating the physiological quality of pitaya seeds

Ortiz

Moritz

Takahashi

et al. 2015

SCA

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“…f) Accelerated ageing was evaluated using four replicates of 50 seeds per repetition. The seeds were disposed over a wire mesh attached to the interior of germination boxes (gerbox), which contained a blade of 40 mL of saturated saline solution (Pedroso et al, 2010). Saturated saline solution was composed of 110 g NaCl L -1 and the germination boxes containing the seeds were maintained at an incubator at 43ºC for 48 hours (Lima et al, 2006).…”

Section: Evaluation Of Seed Physical and Physiological Qualitiesmentioning

confidence: 99%

Chemical composition and physiological quality of wheat seeds with the application of trinexapac-ethyl, a plant growth regulator

Koch¹,

Zimmer²,

Monteiro³

et al. 2017

Aust J Crop Sci

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This study evaluated the effect of the plant growth regulator trinexapac-ethyl on chemical composition and physiological quality of wheat seeds produced under fertilization for high yield potential. The experiment was performed under completely randomized design with five treatments (0; 200; 400; 600; 800 mL ha-1 of the commercial product Moddus ®) and four repetitions. The plant growth regulator was applied at elongation via foliar spraying. Seeds were harvested at the end of crop cycle. Variables evaluated were 1000 seeds weight, germination and first count of germination, speed of germination index, seedling dry matter, electrical conductivity, accelerated ageing and the contents of total soluble sugars, starch, amino acids and proteins. The first count of germination increased until the higher dose. Electrical conductivity after three hours of imbibition reduced at the doses of 600 mL ha-1 and 800 mL ha-1 , indicating greater seed physiological quality. Starch showed a trend of increase until the dose of 448 mL ha-1 ; amino acids until the dose of 243 mL ha-1 and protein until the dose of 417 mL ha-1. The content of total soluble sugars decreased with the increasing dose of the plant growth regulator. Therefore, wheat seeds produced from plants in which trinexapac-ethyl is applied present higher vigor and greater contents of starch, protein and amino acids, but lower content of total soluble sugars. Our results demonstrate that trinexapac-ethyl can be used for wheat management in seed production fields in the recommended dose (400 mL ha-1) with benefits in seed quality and composition.

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“…Esto permite observar diferencias del potencial fisiológico entre lotes de semillas (Panobianco y Marcos Filho, 2001), ya que lotes con menor vigor presentan una disminución de viabilidad más acentuada que lotes con mayor vigor (Marcos Filho, 2005). Sin embargo, la absorción de agua de las semillas puede interferir en la interpretación de los resultados del ensayo (Marcos Filho, 2015), por tal razón, están siendo estudiadas alternativas para la realización de este ensayo, por ejemplo, la substitución de agua por soluciones salinas, con el objetivo de controlar el proceso de deterioro de las semillas sin reducir la sensibilidad del análisis (Pedroso et al, 2010).…”

Section: Introductionunclassified

“…°C por 96 horas y porPedroso et al (2010) en semillas de trigo envejecidas a 41°C por 96 horas. Por otro ladoLopes et al (2010) encontraron que el envejecimiento acelerado tradicional durante 72 horas a 41 °C es una alternativa para encontrar diferencias de vigor de semillas de ocra (Abelmoschus esculentus).En referencia a los resultados obtenidos en el envejecimiento acelerado con solución salina no saturada por 48 horas, se observó que estos concuerdan con los obtenidos porCantos et al (2011), quienes verificaron que el ensayo de envejecimiento acelerado con solución salina durante 48 horas demostró sensibilidad suficiente para evaluar el potencial fisiológico de semillas de avena blanca.…”

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Metodologías para el ensayo de envejecimiento acelerado en semillas de triticale

Castellanos¹,

Lemes²,

Almeida³

et al. 2018

Agrociencia

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El triticale es una Poaceae ampliamente usada en la región sureste de Brasil en el periodo de invierno. Sin embargo, las semillas de esta especie pueden presentar bajo vigor por exposición a factores adversos, ya sea bióticos o abióticos, durante su formación. Esto hace que la evaluación del vigor sea imprescindible para estimar el potencial fisiológico de los lotes de semillas destinados al cultivo de esta forrajera. El objetivo del trabajo fue evaluar la metodología del ensayo de envejecimiento acelerado para determinar el potencial fisiológico de semillas de triticale. Se determinaron el porcentaje de humedad, el porcentaje y velocidad de emergencia de plántulas y el porcentaje de germinación antes y después del envejecimiento acelerado, que fue realizado usando agua, solución salina saturada y solución salina no saturada durante 48, 72 y 96 horas a 42 °C. La interpretación de los resultados permitió concluir que el ensayo de envejecimiento acelerado durante 48 horas con solución salina, saturada o no, es eficiente para evaluar el vigor de semillas de triticale.

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Envelhecimento acelerado em sementes de trigo

Cited by 12 publications

References 6 publications

Tests for evaluating the physiological quality of pitaya seeds

Tests for evaluating the physiological quality of pitaya seeds

Chemical composition and physiological quality of wheat seeds with the application of trinexapac-ethyl, a plant growth regulator

Metodologías para el ensayo de envejecimiento acelerado en semillas de triticale

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