Responses of quinoa estocadas em diferentes temperaturas de germinacao

In this experiment, we assessed the germination and vigor of quinoa seeds packed in paper bags and stored at room temperature for 36, 85, 119, 146, 177 and 270 days. The seeds were harvested under experimental conditions in Marechal Candido Rondon, Parana, during the 2012/13 growing seasons. Four re...

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Bibliographic Details
Published in:Acta scientiarum. Agronomy 2017-01, Vol.39 (1), p.83
Main Authors: Strenske, Andressa, Soares de Vasconcelos, Edmar, Egewarth, Vanessa Aline, Herzog, Neusa Francisca Michelon, de Matos Malavasi, Marlene
Format: Article
Language:Spanish
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Summary:In this experiment, we assessed the germination and vigor of quinoa seeds packed in paper bags and stored at room temperature for 36, 85, 119, 146, 177 and 270 days. The seeds were harvested under experimental conditions in Marechal Candido Rondon, Parana, during the 2012/13 growing seasons. Four replicates of 100 seeds each were established for each storage time, and the seeds were evaluated, on paper, based on the BOD under the following experimental temperature conditions: alternating temperatures of 20 and 30[degrees]C and a constant temperature of 25[degrees]C. The seeds from both treatments were subject to seven-hour photoperiods and 25[degrees]C under continuous darkness. The germinated seeds were counted daily for eight days after sowing, and we evaluated the percentages of normal and abnormal seedlings and the germination index. The experimental design was completely randomized using a split-plot design. Increasing the storage time decreased the percentage of germinated seeds and seed vigor due to the increased number of abnormal seedlings. Over the 430-day study period, quinoa seed germination completely declined under the experimental conditions. The final number of germinating seeds should be evaluated 7 days after the beginning of the germination test. Keywords: Germination test, temperature, photoperiod, seed vigor. Neste ensaio, avaliou-se a germinacao e o vigor de sementes de quinoa, acondicionadas em sacos de papel e armazenadas a temperatura ambiente durante 36, 85, 119, 146, 177 e 270 dias. Semearamse quatro repeticoes de 100 sementes, de cada periodo de armazenamento, sendo as mesmas avaliadas, sob papel, em BOD, sob as seguintes condicoes experimentais de temperatura: alternancia de temperaturas de 20 e 30[degrees]C e temperatura constante de 25[degrees]C. As sementes de ambos os tratamentos foram dispostas em fotoperiodo de sete horas, adicionalmente, outras em 25[degrees]C e escuro continuo. A contagem de sementes germinadas foi realizada diariamente, durante oito dias apos a semeadura, sendo avaliados a porcentagem de plantulas normais, anormais e o indice de velocidade de germinacao. O delineamento experimental empregado foi inteiramente casualizado no esquema de parcela subdividida. Com o aumento do periodo de armazenamento, ocorreu diminuicao do percentual de sementes germinadas e vigor das sementes, devido ao aumento do numero de plantulas anormais. Durante o periodo de 430 dias, as sementes de quinoa perderem todo seu potencial
ISSN:1679-9275
1807-8621
DOI:10.4025/actasciagron.v39i1.30989