Envelhecimento acelerado de sementes de pinhão-manso

Pereira, Márcio Dias; Filho, Sebastião Martins; Laviola, Bruno Galvêas

doi:10.1590/s1983-40632012000100017

Cited by 14 publications

(13 citation statements)

References 10 publications

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“…1 Means followed by the same letter in the column do not differ among themselves by the Tukey's test at 5% probability. This indicates that from a certain amount of exposure to aging treatment the seeds lose vigor, become more sensitive to stress during germination and subsequently are unable to promote the damages reparation, losing the ability to germinate (Rajjou and Debeaujon, 2008;Samarah and Al-Kofahi, 2008). In studies carried out by Bittencourt and Vieira (2006) and Mendes et al (2010), maize (Zea mays L.) and castor (Ricinus communis L.) seeds germination reduction was observed after accelerated aging, with increasing temperature decay from 42 to 45 °C, in the first case, and from 41 to 45 °C, in the second one.…”

Section: Resultsmentioning

confidence: 99%

Accelerated aging test in niger seeds

2015

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-Niger is a promising oilseed species for biodiesel production but there is no much information about the physiological potential of its seeds. Thus, the aim was to adapt the methodologies of accelerated aging test on six lots of niger seeds. The test was carried out by traditional and with saturated salt solution (20 and 40 g NaCl.100 mL -1 ) methods at 41 and 45 °C for 24, 48, 72 and 96 hours. After the decay period, the seeds were submitted to the germination test, proceeding to an evaluation on the seventh day after sowing, counting the normal seedlings percentage. A completely randomized design with four replications of 50 seeds was used and the means were compared by Tukey's test. The accelerated aging test was correlated with seedling emergence and provided lots classification in at least two levels of vigor. For the accelerated aging test, the method with 20 g NaCl.100 mL -1 at 41 °C for 24 hours is recommend. The traditional method is not suitable because it provides water content variation between samples above what is tolerable.Index terms: biodiesel, Guizotia abyssinica (L.f.) Cass., oilseed, vigor.Teste de envelhecimento acelerado em sementes de nigerRESuMo -o niger é uma espécie oleaginosa de interesse para a produção de biodiesel com poucas informações sobre o potencial fisiológico de suas sementes. Portanto, objetivou-se adequar as metodologias do teste de envelhecimento acelerado para a avaliação do vigor de seis lotes de sementes de niger. utilizaram-se os métodos tradicional e com solução saturada de sal (20 e 40 g de NaCl.100 mL -1), nas temperaturas de 41 e 45 °C por 24, 48, 72 e 96 horas. Após o período de deterioração, as sementes foram submetidas ao teste de germinação e procedeu-se a avaliação, aos sete dias após a semeadura, contabilizandose a porcentagem de plântulas normais. O delineamento experimental utilizado foi o inteiramente casualizado, com quatro repetições de 50 sementes e as médias comparadas pelo teste de Tukey. o teste de envelhecimento acelerado correlacionouse com o teste de emergência de plântulas e proporcionou a estratificação dos lotes em pelo menos dois níveis de vigor, recomendando-se o método com 20 g NaCl.100 mL -1 a 41 °C por 24 horas. o método tradicional não é recomendado por proporcionar variação do teor de água entre as amostras, superior ao tolerável.Termos para indexação: biodiesel, Guizotia abyssinica (L.f.) Cass., oleaginosa, vigor.

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Section: Resultsmentioning

confidence: 99%

Accelerated aging test in niger seeds

2015

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“…Esse teste acelera artifi cialmente a taxa de deterioração das sementes através de sua exposição a níveis elevados de temperatura e umidade relativa do ar, considerados os fatores ambientais preponderantes na intensidade e velocidade de deterioração (MARCOS FILHO, 1999). Nessa situação, sementes de baixa qualidade deterioram-se mais rapidamente do que as mais vigorosas, apresentando queda diferenciada da viabilidade (PEREIRA et al, 2012).…”

Section: Introductionunclassified

Diferenciação de lotes de sementes de quiabo pelo teste de envelhecimento acelerado

et al. 2014

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“…So, seed lots with high vigor will maintain the viability or be little affected when submitted to stress, whereas those with low vigor will have their viability reduced, making possible to stablish differences in the physiological potential of the lots (Miloševic et al, 2010;Pereira et al, 2012;Tunes et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Association between the artificial aging test and the natural storage of coffee seeds

et al. 2018

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-The accelerated aging test is recognized as an efficient method for evaluating the vigor of seed lots and for estimating their storage potential. Thus, this work aimed to evaluate the association between artificial aging and natural storage of coffee seeds, through the correlation factor analysis. Seeds of four cultivars of Coffea arabica L. (Catuaí Amarelo, Arara, Catiguá, and Mundo Novo) and one of Coffea canephora Pierre (Apoatã) were used. Part of the newly-harvested seeds were aged in a growth chamber under controlled temperature and relative humidity conditions (42 ºC and 100% RH) for periods of 0, 4, 6, 8, and 10 days. The other part of the seeds was stored in tri-wall paper packaging for a period of 2, 4, and 6 months in a non-climate-controlled environment. Artificial aging allows predictions on the storage potential of coffee seeds, although the artificial aging periods depend on the cultivars.

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Envelhecimento acelerado de sementes de pinhão-manso

Cited by 14 publications

References 10 publications

Accelerated aging test in niger seeds

Accelerated aging test in niger seeds

Diferenciação de lotes de sementes de quiabo pelo teste de envelhecimento acelerado

Association between the artificial aging test and the natural storage of coffee seeds

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