avaliação de métodos de estratificação para a quebra de dormência de sementes de erva-mate evaluation of stratification methods for dormancy break of ilex paraguariensis st. hil. seeds
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ID: 187590
1994
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Abstract
Na tentativa de verificar o método de estratificação mais adequado para a quebra de dormência de sementes de erva mate (Ilex paraguariensis, St. Hil.), três lotes de diferentes procedências foram submetidos, durante 6 meses, a tratamentos de estratificação em ambiente não controlado em campo e sob condições variáveis de disponibilidade de luz, temperatura, ácido giberélico e de nitrato de potássio em laboratório. As avaliações da porcentagem de germinação foram efetuadas a cada dois meses, constatando que existem diferenças de respostas de lotes a métodos de estratificação. Os métodos de estratificação que envolveram alternância de luz e temperatura e adição de nitrato de potássio foram os mais indicados para reduzir o período de dormência de sementes de erva mate.
Three lots of Ilex paraguariensis St. Hil. seeds from different origin were tested to determine the most proper stratification method to break seed dormancy. The seed lots were submitted, during six months to treatments of light and temperature alternation, addition of giberelic acid and potassium nitrate, low temperatures, and stratification in field and laboratory conditions. The evaluation of seed germination percentages were performed bimonthly. There were significative differences in the response of the seed lots to the stratification methods. The methods involving light and temperature alternation and addition of potassium nitrate were the most adequate to reduce the period of Ilex paraguariensis dormancy.
Three lots of Ilex paraguariensis St. Hil. seeds from different origin were tested to determine the most proper stratification method to break seed dormancy. The seed lots were submitted, during six months to treatments of light and temperature alternation, addition of giberelic acid and potassium nitrate, low temperatures, and stratification in field and laboratory conditions. The evaluation of seed germination percentages were performed bimonthly. There were significative differences in the response of the seed lots to the stratification methods. The methods involving light and temperature alternation and addition of potassium nitrate were the most adequate to reduce the period of Ilex paraguariensis dormancy.
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cuquel1994scientiaavaliao
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| Authors | ;F. L. Cuquel;M. L. M. de Carvalho;H.M.C.P. Chamma |
| Journal | journal of the iranian chemical society |
| Year | 1994 |
| DOI |
10.1590/S0103-90161994000300006
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