INSIBIO   05451
INSTITUTO SUPERIOR DE INVESTIGACIONES BIOLOGICAS
Unidad Ejecutora - UE
artículos
Título:
Temporal accumulation of salicylic acid activates the defense resonse against Colletotrichum in strawberry
Autor/es:
GRELLET BOURNONVILLE, CARLOS ; MARTÍNEZ ZAMORA, MARTÍN GUSTAVO; CASTAGNARO, ATILIO PEDRO; DÍAZ RICCI, JUAN CARLOS
Revista:
PLANT PHYSIOLOGY AND BIOCHEMISTRY
Editorial:
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
Referencias:
Lugar: Paris; Año: 2012 p. 10 - 16
ISSN:
0981-9428
Resumen:
Many authors have reported interactions between strawberry cultivars and pathogenic microorganisms,
yet little is known about the mechanisms triggered in the plant. In this paper we examine the participation
of the salicylic acid (SA) signaling pathway involved in the response of Fragaria x ananassa cv.
Pájaro plants to pathogens. Strawberry plants were challenged with the virulent strain M11 of Colletotrichum
acutatum, or with the avirulent strain M23 of Colletotrichum fragariae which confers resistance to
the former. Our study showed that the isolate M23 induced a temporal SA accumulation that was
accompanied with the induction of PR-1 gene expression in strawberry plants. Such events occured after
the oxidative burst, evaluated as the accumulation of hydrogen peroxide and superoxide anion, and
many hours before the protection could be detected. Similar results were obtained with exogenously
applied SA. Results obtained supports the hypothesis that strawberry plants activate a SA mediated
defense mechanisms that is effective against a causal agent of anthracnose. In contrast, plants inoculated
with M11 did not show oxidative burst, SA accumulation or PR1 gene induction. This is the first report
about a defense response signaling pathway studied in strawberry plants