Participación del ácido salicílico como molécula señal en la respuesta de defensa de frutilla (Fragaria ananassa)

GRELLET, CARLOS; MAMANI DE MARCHESE, A; CASTAGNARO, ATILIO P.; DIAZ RICCI, JUAN C

Tafí del Valle. Tucumán

Jornada; 24º Jornadas Científicas de la Asociación de Biología de Tucumán; 2007

Asociación de Biología de Tucumán

Plants has developed several mechanisms of defense against infections caused by pathogens that involve a complex network of signals initiated by the accumulation of reactive oxygen species, followed by variations in the levels of signal molecules such as salicylic acid (SA), jasmonic acid (JA), ethylene (ET) and others which induce the expression of defense genes and proteins. In this work we have investigated the participation of SA on the establishment of a defence response in the cv. Pájaro of strawberry. Results show that when plants were challenged with the isolate M23 of Colletotrichum fragariae, producing an incompatible interaction, a significant accumulation of superoxide (6 hpi) and SA (48 hpi) takes place, whereas no accumulation of these metabolites was observed during a compatible interaction with the isolate M11 of C. acutatum. Furthermore, the accumulation of both defence response markers was associated to the resistance of plants toward the pathogen used. These results suggest that SA is directly involved in the establishment of the defence response in strawberry.