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      EXPRESIÓN GUS EN EXPLANTES DE Solanum phureja (Juz. et. Buk) Var. Criolla Colombia , TRANSFORMADOS CON Agrobacterium tumefaciens Translated title: Gus Expression in Solanum phureja Explants (Juz. et. Buk) Cultivar Criolla Colombia , Transformed with Agrobacterium tumefaciens

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          Abstract

          La expresión transitoria y estable del gen gusA-intron en explantes internodales de papa criolla variedad Criolla Colombia cocultivados con Agrobacterium tumefaciens es reportada. Con el fin de determinar la susceptibilidad de esta variedad a la transformación mediada por A. tumefaciens, explantes internodales de Solanum phureja fueron infectados con la cepa LBA4404 de A. tumefaciens que contiene el plásmido pCAMBIA2301. Este plásmido contiene el gen ntpII que confiere resistencia a kanamicina y el gen reportero gusA-intron. La selección de los explantes potencialmente transgénicos fue realizada en medios con kanamicina. La eficiencia de transformación estable y transitoria fue calculada con base en la actividad GUS (ß-glucuronidasa), detectada por el ensayo histoquímico X-gluc. La expresión transitoria y estable del gen gusA-intron fue observada en células del explante más bien que en tejidos completos. Estos resultados demuestran que la papa criolla (S. phureja Juz. et. Buk) variedad Criolla Colombia es susceptible a la infección por A. tumefaciens.

          Translated abstract

          The stable and transient expression of the gusA-intron reporter gene in internodal explants of "Papa Criolla" cultivar Criolla Colombia co-cultivated with Agrobacterium tumefaciens is reported. In order to determine the susceptibility of this cultivar to the A. tumefaciens-mediated transformation, internodal explants of Solanum phureja were infected by A. tumefaciens containing the vector pCAMBIA2301. This vector contains the kanamycin resistance gene ntpII and the reporter gene gusA-intron. The selection of potential transgenic explants was performed on kanamycin-containing media. The stable and transient transformation efficiency was calculated on the basis of the GUS (ß-glucuronidase) activity, detected by the histochemical X-Gluc essay. Transient and stable expression of the gusA-intron gene is observed in explants cells rather than in whole tissues. Nonetheless, these results demonstrated that "Papa Criolla" (Solanum phureja Juz. et. Buk) Cultivar Criolla Colombia is susceptible to the Agrobacterium tumefaciens infection.

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          Transgenic Bt potato and conventional insecticides for Colorado potato beetle management: comparative efficacy and non-target impacts

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            Evidence for Agrobacterium-induced apoptosis in maize cells.

            Agrobacterium spp. can genetically transform most dicotyledonous plant cells whereas many monocot species are recalcitrant to Agrobacterium-mediated transformation. One major obstacle is that co-cultivation of Agrobacterium spp. with plant tissues often results in cell death. Report here is that, in maize tissues, this process resembles apoptosis, with characteristic DNA cleavage into oligonucleosomal fragments and morphological changes. Two anti-apoptotic genes from baculovirus, p35 and iap, had the ability to prevent the onset of apoptosis triggered by Agrobacterium spp. in maize tissues. p35 is reported to act as a direct inhibitor of a certain class of proteases (caspase) whereas i.a.p. may act upstream to prevent their activation. This evidence raises the possibility that caspase-like proteases may also be involved in the apoptotic pathway in plant cells.
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              Agrobacterium-mediated transformation of Solanum phureja.

              A population of transgenic plants was produced by the transformation of internodal explants of Solanum phureja, DB337/37 (the cultivar Mayan Gold) using an Agrobacterium tumefaciens LBA4404-based vector containing a phytoene synthase gene (crtB). The regeneration strategy utilised a two-step protocol, with a 12-day callus induction stage mediated by 1.07 microM alpha-napthaleneacetic acid (NAA), 7.10 microM zeatin riboside and 0.06 microM gibberellic acid (GA3), followed by a prolonged (up to 90 day) shoot induction stage on medium containing 0.11 microM NAA, 7.10 microM zeatin riboside and 0.06 microM GA3 supplemented with kanamycin at 50 mg l(-1) as the selection agent. Southern analysis of the transgenic population revealed that the transgene copy number varied between one and five in the lines tested. Northern blot analysis showed significant expression of the introduced crtB gene in some lines during tuber development. Cytological analysis of the material showed a high incidence of chromosome doubling in the transgenic population with over 80% of all lines tested having doubled their chromosome complement during the transformation process.
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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Journal
                abc
                Acta Biológica Colombiana
                Acta biol.Colomb.
                Universidad Nacional de Colombia, Facultad de Ciencias, Departamento de Biología (Bogotá )
                0120-548X
                April 2008
                : 13
                : 1
                : 119-130
                Affiliations
                [1 ] Universidad Industrial de Santander Colombia
                [2 ] Universidad Nacional de Colombia Colombia
                Article
                S0120-548X2008000100008
                89ae352d-a04f-4b89-af68-cdd0b3175203

                http://creativecommons.org/licenses/by/4.0/

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                SciELO Colombia

                Self URI (journal page): http://www.scielo.org.co/scielo.php?script=sci_serial&pid=0120-548X&lng=en
                Categories
                BIOLOGY

                General life sciences
                Solanum,Agrobacterium tumefaciens,potato,GUS,transient expression,stable expression,transgenic cultivar,Solanum phureja,actividad Gus,expresión estable y transitoria,variedad Criolla Colombia

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