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|Type:||Artigo de evento|
|Title:||In Vitro Culture Of Four Medicinal Asteraceae Species For Agrobacterium Rhizogenes Transformation|
|Abstract:||Hairy roots produced by infection with Agrobacterium rhizogenes are phenotypically altered and show an overproduction of secondary compounds. Four Asteraceae species were tested: Artemisia annua (with proven antimalarial activity), Calendula officinalis (antiseptic), Mikania glomerata (a Brazilian plant used for respiratory disease treatment) and Helianthuus annuus (sunflower with tonic and anti-neuralgic activities). Seeds of Artemisia annua, Calendula officinalis and Helianthus annuus were surface disinfected with 25% NaOCl solution for 15 min., and Mikania glomerata stems were surface disinfected with 25% NaOCl solution for 30 min. Sterile and viable explants were mantained in complete Murashige & Skoog's culture medium and subcultured after 28 days. Once established in culture, the explants of all species were inoculated with Agrobacterium rhizogenes strains 8196 and 15834. Only Artemisia annua showed a positive hairy root response. These roots were excised and cultured "in vitro". In order to confirm the transgenic character of the hairy roots a Southern Blot hybridization was carried out. The culture protocols established for the other three species were used to obtain explants for further transformation tests.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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