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| Bacci Jr.,Maurício; Soares,Rafael B.S.; Tajara,Eloíza; Ambar,Guilherme; Fischer,Carlos N.; Guilherme,Ivan R.; Costa,Eduardo P.; Miranda,Vitor F.O.. |
| Transposable elements (TE) are major components of eukaryotic genomes and involved in cell regulation and organism evolution. We have analyzed 123,889 expressed sequence tags of the Eucalyptus Genome Project database and found 124 sequences representing 76 TE in 9 groups, of which copia, MuDR and FAR1 groups were the most abundant. The low amount of sequences of TE may reflect the high efficiency of repression of these elements, a process that is called TE silencing. Frequency of groups of TE in Eucalyptus libraries which were prepared with different tissues or physiologic conditions from seedlings or adult plants indicated that developing plants experience the expression of a much wider spectrum of TE groups than that seen in adult plants. These are... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Eucalyptus; Transposable element. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000400019 |
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| Silva-Pinhati,Ana C.O.; Bacci Jr.,Maurício; Siqueira,Célia G.; Silva,Aline; Pagnocca,Fernando C.; Bueno,Odair C.; Hebling,Maria J.A.. |
| The isolation and maintenance of symbiotic basidiomycete fungi living in association with ants of the tribe Attini has been hindered by the slow growth rate of these fungi and the presence of other microorganisms on the surface of the material which the ants maintain inside their nests to provide a growth substrate for their symbiont. In this paper we describe a method which increases the efficiency of isolation of these fungal symbionts by over seven fold as compared to traditional isolation procedures. Underground nests of attine ants of the genera Atta, Acromyrmex, Trachymyrmex and Mycetarotes were located, from which samples containing the fungal symbiont and ants were collected and transported to the laboratory where the ants were able to clean the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Atta; Acromyrmex; Trachymyrmex; Mycetarotes; Basidiomycete; Symbiosis. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2005000100001 |
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