Implicación del sistema de secreción de tipo 3 de Sinorhizobium (Ensifer) fredii HH103 en la modulación de la respuesta de defensa de Glycine max cv. Williams y estudio de los efectores específicos secretados a través de este sistema

Résumé

Plants that interact with pathogenic bacteria in their natural environments have developed barriers to block or contain the infection. Phytopathogenic bacteria have evolved mechanisms to subvert these defenses and promote infection. Thus, some Gram-negative phytopathogenic bacteria use the type 3 secretion system (T3SS) to deliver proteins, called effectors, directly into the cytoplasm of the host cells. These effectors suppress plant defense responses to promote infection and growth of the pathogen (Galan and Collmer, 1999). The T3SS has also been found in some symbiotic rhizobial strains and the secreted effectors, collectively known as nodulation outer proteins (Nops), are involved in host-range determination and symbiotic efficiency. Sinorhizobium (Ensifer) fredii HH103 is a broad-host range bacterium able to nodulate dozens of legumes including soybean, which is considered its natural host plant. This bacterium secretes at least eight proteins through the T3SS in response to in... <a href="http://hdl.handle.net/11441/28918">Ver más</a>