Modification of primary and secondary metabolism of potato plants by nitrogen application differentially affects resistance to Phytophthora infestans and Alternaria solani.
Plant Biol (Stuttg)
; 8(5): 653-61, 2006 Sep.
Article
en En
| MEDLINE
| ID: mdl-16821190
Potato plants ( SOLANUM TUBEROSUM L. cv. Indira) were grown at two levels of N supply in the greenhouse. Plants supplied with 0.8 g N per plant (high N variant) showed significantly increased biomass as compared to plants without additional N fertilisation (low N variant). C/N ratio was lower and protein content was higher in leaves of the high N variant. The concentration of chlorogenic acids and flavonols was significantly lower in leaves from the high N variant. Whereas resistance to ALTERNARIA SOLANI increased when plants were supplied with additional nitrogen, these plants were more susceptible to PHYTOPHTHORA INFESTANS. After infection with both pathogens, we found a strong induction of p-coumaroylnoradrenaline and p-coumaroyloctopamine, which are identified for the first time in potato leaves and are discussed as resistance factors of other solanaceous plants.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Phytophthora
/
Solanum tuberosum
/
Alternaria
/
Nitrógeno
Tipo de estudio:
Prognostic_studies
Idioma:
En
Revista:
Plant Biol (Stuttg)
Asunto de la revista:
BOTANICA
Año:
2006
Tipo del documento:
Article
País de afiliación:
Alemania
Pais de publicación:
Reino Unido