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| Masetto,Tathiana Elisa; Faria,José Marcio Rocha; Davide,Antonio Claudio; Silva,Edvaldo Aparecido Amaral da. |
| The aim of this study was to assess the desiccation tolerance and DNA integrity in Eugenia pleurantha seeds dehydrated to different moisture contents (MCs). Seeds extracted from mature fruits were submmited to drying in silica gel and evaluated at every five percentual points of decrease from the initial MC (35.5%, fresh weight basis). The effects of dehydration on seeds were verified through germination tests and DNA integrity assessment. Undried seeds achieved 87% germination, value reduced to 36% after being dried to 9.8% MC. When dried slightly more, to 7.4% MC, seeds were no longer able to germinate, suggesting an intermediate behavior in relation to desiccation tolerance. It was observed DNA degradation in seeds with 7.4% MC, which might have... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Forestry seeds; DNA degradation. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222008000100022 |
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| Masetto,Tathiana Elisa; Faria,José Marcio Rocha; Davide,Antonio Claudio; Silva,Edvaldo Aparecido Amaral da. |
| The aim of this study was to assess the desiccation tolerance and DNA integrity in Eugenia pleurantha seeds dehydrated to different moisture contents (MCs). Seeds extracted from mature fruits were dried in silica gel and evaluated at every five percentual points of decrease from the initial MC (35.5%, fresh weight basis). The effects of dehydration on seeds were verified through germination tests and DNA integrity assessment. Undried seeds achieved 87% germination, value reduced to 36% after being dried to 9.8% MC. When dried slightly more, to 7.4% MC, seeds were no longer able to germinate, suggesting an intermediate behavior in relation to desiccation tolerance. DNA degradation was observed in seeds with 7.4% MC, which might have contributed to the loss... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Forestry seeds; DNA degradation. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222008000200007 |
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| Guimarães,Cristiane Carvalho; Faria,José Marcio Rocha; Oliveira,Julio Maia; Silva,Edvaldo Aparecido Amaral da. |
| O presente trabalho teve por objetivo a avaliação da perda da tolerância à dessecação (TD) em sementes de Peltophorum dubium durante e após a germinação. As sementes foram colocadas para germinar e, ao atingirem 1, 3 e 5 mm de raiz primária (68% de umidade), foram desidratadas em sílica gel, até atingirem o grau de umidade inicial (8%), sendo em seguida reidratadas e avaliadas quanto à sobrevivência (retomada do crescimento e formação de plântulas normais). Procedimento semelhante foi adotado para os ensaios realizados durante a embebição, onde foram amostradas 100 sementes divididas em quatro repetições de 25 para cada um dos seguintes tempos de embebição: 12, 24, 48, 60 e 72 horas. Em seguida, foram selecionados diferentes pontos de interesse (12, 48 e... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: DNA nuclear; Ciclo celular; Peltophorum dubium. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222011000200002 |
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