Germinação sob altas temperaturas para avaliação do potencial fisiológico de sementes de milho

Sbrussi, Cesar Augusto Gasparetto; Zucareli, Claudemir

doi:10.1590/0103-8478cr20130906

Cited by 6 publications

(5 citation statements)

References 5 publications

(5 reference statements)

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“…Although 25 ºC is not considered a low temperature for germination in maize seeds, and is suggested when carrying out the standard germination test (BRASIL, 2009), using a temperature of 30 ºC may have resulted in greater dry-weight accumulation in the purple maize seedlings due to favouring greater speed in the germination process (Figure 2B). When studying different maize batches, Sbrussi and Zucareli (2015) found that a temperature of 34 ºC gave the greatest dry weight accumulation for both the shoots and root system of maize seedlings.…”

Section: Resultsmentioning

confidence: 99%

Toxidez por alumínio: estresse oxidativo durante a germinação e desenvolvimento inicial de milho roxo

Alves¹,

Silva²,

Hermínio³

et al. 2022

Revista Ciência Agronômica

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Purple maize is a source of natural pigments that can be used for various industrial purposes; however, soil contamination from aluminium affects production. The aim of this study was to evaluate the effect of aluminium toxicity associated with different temperatures on seed germination and initial development in purple maize seedlings, through germination, initial seedling growth and indicators of oxidative damage. The experimental design was completely randomised in a 5 × 2 factorial scheme (concentrations -0, 25, 50, 75 and 100 mg L -1 × temperatures -25 and 30 ºC). The parameters under evaluation were germination percentage, length and total dry weight of the root system and shoots, and indicators of oxidative damage (chlorophyll a, chlorophyll b and total chlorophyll, total carotenoids and lipid peroxidation) at the seedling stage. Aluminium chloride concentrations have no effect on seed germination in purple maize. With increasing aluminium concentrations, the length, dry weight, chlorophyll a, chlorophyll b, total chlorophyll and total carotenoids of normal purple maize seedlings are reduced, while lipid peroxidation increases. Aluminium toxicity stress in purple maize seedlings can be detected using biochemical indicators (chlorophyll a, chlorophyll b and total chlorophyll, total carotenoids and lipid peroxidation).

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Section: Resultsmentioning

confidence: 99%

Toxidez por alumínio: estresse oxidativo durante a germinação e desenvolvimento inicial de milho roxo

Alves¹,

Silva²,

Hermínio³

et al. 2022

Revista Ciência Agronômica

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“…2) and the smallest value of β2 of inclination of the quadratic regression model when subjected to higher temperatures, (0.19), being then considered the seeds with greater force. The tolerance for above-average temperatures can pose a direct relationship with the plant's performance on the field, this factor can then be used efficiently as a test for the assessment of seed vigor [32].…”

Section: Resultsmentioning

confidence: 99%

Germination under High Temperatures of Maize Adapted to the Cerrado of Tocantins

Barbosa

Aguiar

Siebeneichler

et al. 2019

IJPSS

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The purpose of this study was to evaluate the response of germination and vigor in maize seeds in laboratory conditions, exposure to high temperatures, in order to highlight the most adaptable genotypes at these temperatures. Were supplied three cultivars of the PIONEIRA LTDA. (PIONEIRA HS-9, PIONEIRA HS-14i, PIONEIRA ROBUSTO), to perform the experiment, in addition to the commercial cultivar BRS 3040. After the selection of superior genotypes, were performed at temperatures of 25 reviews, 30, 35 and 40ºC, these being: germination, first count, seedling dry mass and speed index of the emergence of seedlings. At the temperature of 25°C were made the cold test and seedling length, shoot and root axis. The results were submitted to analysis of variance, comparison of averages by Tukey test, to three genotypes and regression analysis to high school, to three genotypes and the witness commercial. Whereas the maximum temperature of 35°C tested, one could observe that the PIONEIRA HS-6 genotype presented the best adaptation to high temperatures. The PIONEIRA ROBUSTO genotype was more adapted to high temperatures whereas as the highest temperature of 40°C. The BRS 3040 was not adapted to the high temperatures in relation to genotypes produced under conditions of high temperatures of the Cerrado.

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“…(2015), que, avaliando o efeito da temperatura no comportamento de germinação de milho branco, amarelo, roxo e vermelho, observaram que a temperatura para o milho apresentar melhor comportamento está na faixa dos 30ºC, demonstrando, assim como no presente estudo, que as temperaturas baixas de 15ºC e as elevadas de 40°C, provocam retardo na germinação das sementes, quando comparadas à faixa intermediária. Sbrussi & Zucareli (2015), avaliando a qualidade fisiológica de sementes de milho germinadas em altas temperaturas também mostraram decréscimo na germinação de sementes submetidas a temperaturas superiores a 34ºC.…”

Section: Discussionunclassified

Simulação do efeito da variação da temperatura ambiente na germinação de variedades de milho

Carvalho¹,

Bezerra²,

Reis

et al. 2017

J. Env. Anal. Progr.

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A B S T R A C TIncreases in room temperature may significantly influence the germination process of several plant species. It can directly interfere directly with physiological, biochemical and other activities, thus altering the maximum seed capacity to activate seedling emergence, as well as the morphological Plants. The objective of this study was to evaluate the effect of temperature on germination of three varieties of corn. It was used three different maize varieties: BRS Assum black, BRS011, and BRS033 Asa Branca. The treatments consisted of three controlled temperature: 20°C and 40°C and 30°C. The variables analyzed were percentage of germination; germination speed index; mean germination time; germination frequency; height change and stem; stem diameter; number of leaves; chlorophyll a, b, overall; fresh and dry stem, leaf and root. The Tukey test was applied at 5%, in the variables when significant. The 30°C temperature range is ideal for germination and early development of corn seedlings. The varieties studied do not differ significantly for dry mass production, except the roots, as well as the biometric variables. There are no differences between varieties in the production of chlorophyll. The temperature of 30 proved that influences the increased production of chlorophyll A and total; stem and leaves dry weight as well as the biometric variables. Keywords: Emergence, seedling, variables, production. R E S U M OAumentos na temperatura ambiente podem influenciar de forma significativa o processo de germinação de diversas espécies vegetais. Podem interferir diretamente em atividades fisiológicas, bioquímicas entre outras, alterando desta forma a máxima capacidade das sementes em ativar a emergência das plântulas, bem como a formação morfológica das plantas. O objetivo desse estudo foi simular em câmaras de crescimento o efeito de diferentes temperaturas na germinação de três cultivares de milho: BRS Assum preto, BRS011 e BRS033 Asa Branca. O experimento foi implantado a partir da utilização dos tratamentos formados por três temperaturas controladas: 20º, 30º e 40ºC. As variáveis analisadas foram percentuais de germinação; índice de velocidade de germinação; tempo médio de

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Germinação sob altas temperaturas para avaliação do potencial fisiológico de sementes de milho

Abstract: RESUMO O objetivo do trabalho foi avaliar e padronizar o teste de germinação sob altas temperaturas para avaliação do vigor de sementes de milho. Foram utilizados seis lotes de

Cited by 6 publications

References 5 publications

Toxidez por alumínio: estresse oxidativo durante a germinação e desenvolvimento inicial de milho roxo

Toxidez por alumínio: estresse oxidativo durante a germinação e desenvolvimento inicial de milho roxo

Germination under High Temperatures of Maize Adapted to the Cerrado of Tocantins

Simulação do efeito da variação da temperatura ambiente na germinação de variedades de milho

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