Indolic secondary metabolites protect Arabidopsis from the oomycete pathogen Phytophthora brassicae.
Plant Signal Behav
; 5(9): 1099-101, 2010 Sep.
Article
en En
| MEDLINE
| ID: mdl-21490418
The model plant Arabidopsis thaliana contains a large arsenal of secondary metabolites that are not essential in development but have important ecological functions in counteracting attacks of pathogens and herbivores. Preformed secondary compounds are often referred to as phytoanticipins and metabolites, that are synthesized de novo in response to biotic stress are known as phytoalexins. Camalexin is the typical phytoalexin of Arabidopsis. It has antimicrobial activity towards some pathogens and was shown to be an important component of disease resistance in several plant pathogen interactions. Glucosinolates (GS) are characteristic phytoanticipins of the Brassicaceae family including Arabidopsis. GS are best known as repellents or attractants for herbivorous insects and their predators whereas their antimicrobial potential has received relatively little attention. The GS are glucosides and the biologically active aglycone is released upon biotic stress by glucohydrolase enzymes commenly called myrosinases. Because an Arabidopsis mutant susceptible to the oomycete pathogen Phytophthora brassicae shows a partial deficiency in both camalexin and iGS accumulation we became intrigued by the role of these secondary compounds in disease resistance. Our results show that disease resistance of Arabidopsis to P. brassicae is established by the combined action of iGS and camalexin.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Phytophthora
/
Enfermedades de las Plantas
/
Tiazoles
/
Arabidopsis
/
Proteínas de Arabidopsis
/
Resistencia a la Enfermedad
/
Glucosinolatos
/
Indoles
Tipo de estudio:
Prognostic_studies
Idioma:
En
Revista:
Plant Signal Behav
Asunto de la revista:
BOTANICA
/
FISIOLOGIA
Año:
2010
Tipo del documento:
Article
País de afiliación:
Suiza
Pais de publicación:
Estados Unidos