Skip to main content
Ir a la página de inicio de la Comisión Europea (se abrirá en una nueva ventana)
español es
CORDIS - Resultados de investigaciones de la UE
CORDIS
Contenido archivado el 2024-05-07

ENGINEERING AND EVALUATION OF SYST NEMATODE RESISTANCE IN SUGARBEET

Objetivo



The cyst nematode Heterodera schachtii is an important pest for the sugarbeet crop in Europe.
Very few effective nematicides are on the market and increasing environmental concerns will most probably result in restricting these toxic chemicals in Europe by the end of the century. Therefore, the introduction of cyst nematode resistance into @ugarbeet is a priority target for the sugarbeet companies. Since interspecific crossing-in natural resistance genes causes tremendous problems in sugarbeet, we propose the design and evaluation of a novel genetic basis for nematode resistance in plants.
The proposed strategy for genetic engineering resistance to cyst nematodes in sugarbeet aims at destroying selectively the nematode-induced feeding sites (syncytia) in sugarbeet roots. Sedentary nematodes (cyst and root knot nematodes) are absolutely dependent on the formation and maintenance of plant feeding sites. The strategy requires a chimeric construct consisting of a nematode-induced plant promoter, more or less specifically active in the feeding site, and a cytotoxic gene.
Several plant promoters that are activated (or down-regulated) in the feeding sites have been identified (in Arabidopsis, tomato and potato). These promoters will be tested by fusion to a reporter gene and analysis of their expression in transgenic sugarbeet roots. This will allow to confirm if the isolated promoters are strongly induced (or down-regulated) in the feeding sites of H. schachtii in sugarbeet roots.
As a cytotoxic gene, the barnase gene, a natural ribonuclease gene, will be fused to the nematode-induced promoters. A second chimeric gene containing a promoter which is down-regulated fused to the barstar (an inhibitor of barnase) gene will be used to inactivate unwanted expression of the barnase gene outside of the feeding structure. The barnase/barstar system has been successfully applied for the selective destruction of anther tissue resulting in the engineering of male sterility in oilseed rape, tobacco and corn.
The proposed project encompasses the cloning and transformation into sugarbeet of the corresponding "nematode resistance" (NR) constructs using the promoters which are induced or down-regulated in syncytia. A first nematological evaluation will be done on Agrobacterium rhizogenes-transformed sugarbeet root cultures that will allow a rapid selection of those chimeric gene combinations that confer nematode resistance. The effect of the engineered resistance will be studied on a cellular level using electron microscopy.
The work will be complemented by detailed molecular and functional analyses of the induced promoters to allow the design of an improved construct that has more specific feeding-site expression and less background expression in other tissues.
Finally, on basis of the obtained data, optimized constructs will be transformed into sugarbeet and the resulting transgenic plants will be evaluated for nematode resistance in vitro and in the greenhouse.

Ámbito científico (EuroSciVoc)

CORDIS clasifica los proyectos con EuroSciVoc, una taxonomía plurilingüe de ámbitos científicos, mediante un proceso semiautomático basado en técnicas de procesamiento del lenguaje natural. Véas: El vocabulario científico europeo..

Para utilizar esta función, debe iniciar sesión o registrarse

Tema(s)

Las convocatorias de propuestas se dividen en temas. Un tema define una materia o área específica para la que los solicitantes pueden presentar propuestas. La descripción de un tema comprende su alcance específico y la repercusión prevista del proyecto financiado.

Convocatoria de propuestas

Procedimiento para invitar a los solicitantes a presentar propuestas de proyectos con el objetivo de obtener financiación de la UE.

Datos no disponibles

Régimen de financiación

Régimen de financiación (o «Tipo de acción») dentro de un programa con características comunes. Especifica: el alcance de lo que se financia; el porcentaje de reembolso; los criterios específicos de evaluación para optar a la financiación; y el uso de formas simplificadas de costes como los importes a tanto alzado.

CSC - Cost-sharing contracts

Coordinador

FLANDERS INTERUNIVERSITY
Aportación de la UE
Sin datos
Dirección
LEDEGANCKSTRAAT, 35
9000 GENT
Bélgica

Ver en el mapa

Coste total

Los costes totales en que ha incurrido esta organización para participar en el proyecto, incluidos los costes directos e indirectos. Este importe es un subconjunto del presupuesto total del proyecto.

Sin datos

Participantes (3)

Mi folleto 0 0