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| Ribas,Alessandra Ferreira; Pereira,Luiz Filipe Protasio; Vieira,Luiz Gonzaga E.. |
| In the last 15 years, considerable advances were made in coffee genetic transformation. Different research groups in the world have been able to transform coffee with genes for insect resistance, decaffeinated coffee, herbicide resistance and control of fruit maturation. Although the majority of the research is still limited to laboratory and greenhouse studies, initial field tests with transformed coffee are beginning to appear in the literature. In this review we provide an update on the state of coffee genetic transformation, presenting technical aspects related to tissue culture systems, strategies for selection and transformation with particle bombardment, as well as the use of Agrobacterium tumefaciens. We also discuss the potential applications of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agrobacterium; Coffea; Biolistic; Genetic engineering; Transgenic. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202006000100007 |
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| Santarém,Eliane Romanato. |
| Vários métodos para transferência de genes em plantas têm sido propostos, possibilitando a produção de plantas transgênicas das espécies cultivadas de maior importância no mundo. Apesar da transformação de plantas utilizando Agrobacterium ter vantagens sobre os sistemas que não utilizam vetares biológicos, sua eficiência para a transferência de DNA ainda é baixa. Recentemente, foi proposta uma tecnologia, denominada SAAT (Transformação mediada por Agrobacterium e Ultra-som), que consiste no tratamento de tecidos vegetais com ultra-som em presença de Agrobacterium. Estudos com microscópio eletrônica de varredura e microscópio óptica mostraram que o tratamento com SAAT produz um grande número de ferimentos pequenos e uniformes na superfície do tecido,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agrobacterium; SAAT; Transformação; Ultra-som. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782000000400029 |
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| Mahmood,Tariq; Zar,Tamkina; Saqlan Naqvi,S.M. |
| Electroporation entails brief, high intensity pulse to create transient pores in the cell membrane to facilitate the entry of exogenous macromolecules, which may otherwise be excluded. Removal of the external field leads to the resealing of the membrane electropores permitting the survival of the electrically stimulated recipient cells. Using this technique foreign deoxyribonucleic acid (DNA) has been successfully introduced into many cell types both from prokaryotes and eukaryotes. Increase in pulse voltage and length beyond a critical limit has been reported to decrease transformation efficiency, hence in this study we have investigated another strategy i.e. increase in the number of pulses at constant high voltage and pulse duration. Commonly used... |
| Tipo: Journal article |
Palavras-chave: Agrobacterium; Electroporation; Pulse number; Transformation efficiency. |
| Ano: 2008 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582008000100015 |
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| Lee,Ki-Won; Choi,Gi Jun; Kim,Ki-Yong; Yoon,Sei Hyung; Ji,Hee Chung; Park,Hyung Soo; Lim,Young Chul; Lee,Sang-Hoon. |
| In the present study, genotypic variation of Agrobacterium-mediated transformation of Korean Italian ryegrass has been evaluated. Mature seed-derived calli of seven cultivars were inoculated and co-cultured with Agrobacterium tumefaciens carrying the binary vector pCAMBIA1301, which contains a reporter gene (gus) and a plant selectable marker gene conferring resistance to hygromycin (hpt) in the T-DNA region. The effects of several factors such as callus type and callus age on transformation effectiveness and the expression of the GUS gene were investigated. The highest transformation effectiveness (6.7%) was obtained with the Hwasan 101 cultivar when 9-week-old calli (type-I) were inoculated with Agrobacterium. The overall transformation rates of the... |
| Tipo: Journal article |
Palavras-chave: Agrobacterium; Forage crop; Italian ryegrass; Transgenic plants. |
| Ano: 2010 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582010000300008 |
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