INVESTIGADORES
GARRIZ Andres
artículos
Título:
The sesquiterpene botrydial produced by Botrytis cinerea induces the hypersensitive response and its toxicity is modulated by host signaling pathways mediated by salicylic acid and jasmonic acid. *(autoría compartida por FRR y AG)
Autor/es:
FR ROSSI*; GARRIZ A*; MARÍA MARINA; FM ROMERO; MARÍA E. GONZALEZ; ISIDRO G. COLLADO; FERNANDO L. PIECKENSTAIN
Revista:
MOLECULAR PLANT-MICROBE INTERACTIONS
Editorial:
AMER PHYTOPATHOLOGICAL SOC
Referencias:
Año: 2011 vol. 24 p. 888 - 896
ISSN:
0894-0282
Resumen:
Botrytis cinerea, as a necrotrophic fungus, kills host tissues and feeds on the remains. This fungus is able to induce the hypersensitive response (HR) on its hosts, thus taking advantage on the host?s defense machinery for generating necrotic tissues. However, the identity of HR effectors produced by B. cinerea is not clear. The aim of this work was to determine if botrydial, a phytotoxic sesquiterpene produced by B. cinerea, is able to induce the HR on plant hosts, using A. thaliana as a model. Botrydial induced the expression of the HR marker Athsr3; callose deposition and the accumulation of reactive oxygen species and phenolic compounds. Botrydial also induced the expression of PR1 and PDF1.2, two pathogenesis related proteins involved in defense responses regulated by salicylic acid (SA) and jasmonic acid (JA), respectively. A. thaliana and tobacco plants defective in SA signaling were more resistant to botrydial than wild type plants, as opposed to A. thaliana plants defective in JA signaling, which were more sensitive. It can be concluded that botrydial induces the HR on its hosts and its effects are modulated by host signaling pathways mediated by SA and JA.